Feed Gas Or Constituent Thereof Is Sweep Gas Patents (Class 95/105)
  • Patent number: 11376548
    Abstract: Process of treating a net gas stream is disclosed. The process includes sending the net gas stream to a compressor to produce a compressed gas stream. The compressed gas stream is then sent to a pressure swing adsorption unit to produce a hydrogen product stream and a tail gas stream. Tail gas stream from the pressure swing adsorption unit is sent to a first membrane unit to produce a first permeate stream and a first non-permeate stream. Portion of the tail gas stream is sent to a second membrane unit to produce a second permeate stream and a second non-permeate stream.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: July 5, 2022
    Assignee: UOP LLC
    Inventors: Bradley P. Russell, Gautam Pandey, David A. Wegerer, Wim Elseviers
  • Patent number: 11193860
    Abstract: Embodiments of the present disclosure provide a gas purifying device and an ion migration spectrometer. The gas purifying device includes a first purificant vessel, a second purificant vessel and a valve communicated between the first purificant vessel and the second purificant vessel. The valve is configured to allow a gas flows from the second purificant vessel to the first purificant vessel in a first state and to permit the gas to flow from the first purificant vessel to the second purificant vessel in a second state.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: December 7, 2021
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Qingjun Zhang, Yuanjing Li, Zhiqiang Chen, Ziran Zhao, Yinong Liu, Yaohong Liu, Lili Yan, Ge Li, Qiufeng Ma
  • Patent number: 11033856
    Abstract: A multistage membrane system and a process for treating a gas stream is provided in which the multistage membrane system comprises at least two membrane units wherein a first stage membrane unit comprises a polymeric membrane and a second membrane unit comprises a microporous zeolitic inorganic membrane or a combination of a microporous zeolitic inorganic membrane and a polymeric membrane.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: June 15, 2021
    Assignee: UOP LLC
    Inventors: Chunqing Liu, Simon E. Albo, David W. Greer, Xueliang Dong, Mark M. Davis
  • Patent number: 10836626
    Abstract: To provide a vapor recovery device capable of making the most of the capacity of the adsorption/desorption towers and efficiently adsorbing and desorbing fuel oil vapor. A vapor recovery device 1 having: a pump 5 disposed on a pipe 4 branched from a vent pipe 3, one end of which being connected to an underground tank 2, to suck a fuel oil vapor V in the underground tank; a condenser 6 connected, on the branch pipe, to a downstream side of the pump to condense the fuel oil vapor; and a plurality of adsorption/desorption towers 7a, 7b, 8a, 8b connected, on the branch pipe, to a downstream side of the condenser in series to adsorb/desorb fuel oil vapor fed from the condenser. One of the adsorption/desorption towers can be arranged above another one of remaining adsorption/desorption towers, and the pump may be fixed in a housing 30 through a bottom face and a side face of the pump and elastic bodies 32, 33.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: November 17, 2020
    Assignee: TATSUNO CORPORATION
    Inventors: Kazuyuki Karino, Al Yuta
  • Patent number: 10343105
    Abstract: Provided an air cleaning system, which includes: a first reactor which has a first inlet and a first outlet and in which a channel is formed; a first moisture adsorption filter and a first water-soluble gas pollutant adsorption filter that are provided inside the first reactor and are provided so that a gas passes therethrough sequentially while flowing along the channel from the first inlet to the first outlet; a plurality of first magnetrons that are provided at a lateral portion of the first reactor so as to correspond respectively to the first moisture adsorption filter and the first water-soluble gas pollutant adsorption filter and selectively apply microwaves to the first moisture adsorption filter and the first water-soluble gas pollutant adsorption filter; and a heat exchanger that receives hot air containing a water-soluble gas pollutant and moisture, both of which are desorbed from the first moisture adsorption filter and the first water-soluble gas pollutant adsorption filter and are discharged by
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: July 9, 2019
    Assignee: ECOPRO CO., LTD.
    Inventors: Dong Che Lee, Seong Jin Yoon, Sung Jong Cho, Jeong Yeon Kim, Sang Jun Park, Tae Kyung Huh
  • Patent number: 10302254
    Abstract: A natural gas storage facility for reducing effects of diurnal demand on a natural gas source is disclosed. The natural gas storage facility includes a guard bed system that has a heavy natural gas component storage capacity and that is operable to remove impurities from introduced natural gas, to selectively separate the introduced natural gas into a heavy natural gas component and a light natural gas component, to retain the heavy natural gas component and to release the heavy natural gas component and an adsorption bed system that fluidly couples to the guard bed system, that has a light natural gas component storage capacity, that contains a light natural gas adsorbent that is a microporous material, and that is operable to retain the light natural gas component using the light natural gas adsorbent and to release the light natural gas component from the light natural gas adsorbent.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: May 28, 2019
    Assignee: SAUDI ARABIAN OIL COMPANY
    Inventors: Yuguo Wang, Cemal Ercan, Mohammed Ghalib Al-Hashim, Anwar H. Al-Khawajah, Rashid M. Othman
  • Patent number: 10188821
    Abstract: Provided is an oxygen concentration device which, as an oxygen concentration device having a reduced difference in flow rates of gas which flows through a pressure equalization valve of a pressure equalization path during a purge step and a pressure equalization step, is provided at at least one end side of the pressure equalization valve with a pressure control member having a difference in pressure loss due to the direction of gas flow so that pressure loss of the gas which flows through the pressure equalization path in one direction becomes nearly equal to that of the gas which flows therethrough in the opposite direction.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: January 29, 2019
    Assignee: Teijin Pharma Limited
    Inventors: Maki Hojo, Katsushi Fujimoto
  • Patent number: 10179308
    Abstract: A system for calculating maintenance predictions and making improvements to performance deficiencies to one or more components in an on-board inert gas generating system (OBIGGS) is described. The OBIGGS components include an ozone converter, heat exchanger, inlet filter, and Air Separation Module (ASM). The system comprises a prognostic health monitoring (PHM) sensor network comprising at least one respective sensor coupled to each of the components of the OBIGGS. Each at least one respective sensor is configured to output a respective data signal corresponding to a performance condition of a respective component. A control unit is operatively coupled to each component and signally coupled to each respective sensor of the PHM sensor network. The control unit includes at least one test condition algorithm configured to analyze the respective data signal to calculate the maintenance prediction for the respective component.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: January 15, 2019
    Assignee: Carleton Life Support Systems Inc.
    Inventors: Jeremy Schaeffer, Jesse Peterson, William Vestal, Abdullah Al-Yafawi
  • Patent number: 10046270
    Abstract: A method for operating an air-drying device (10) and an air-drying device (10) are provided. The air-drying device (10) has at least one adsorption device (20) with a first adsorption section (21), a second adsorption section (22), an air feed line (11), an air removal line and an analysis unit (13). The first adsorption section (21) and the second adsorption section (22) can be used alternatingly to dry air (70). The air feed line (11) feeds air (70) to be dried and is connected to an inlet opening (24) of the adsorption device (20) in a fluid-communicating manner. The air removal line (12) removes dried air (70) and is connected to an outlet opening (25) of the adsorption device (20) in a fluid-communicating manner. A compressed air system (60) for providing compressed air (70) has such an air-drying device (10).
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: August 14, 2018
    Assignee: Drägerwerk AG & Co. KGaA
    Inventors: Reiner Harm, Kjer Martensen, Marcel Busch, Raimund Mödlhammer
  • Patent number: 9669350
    Abstract: A process for adsorbing hydrogen chloride (HCl) from a regeneration vent gas. The regeneration vent gas is cooled from a catalyst regeneration zone. The cooled regeneration vent gas is passed to an adsorption zone that is spaced apart from the catalyst regeneration zone. HCl from the regeneration vent gas is adsorbed onto a sorbent in the adsorption zone to enrich the sorbent with HCl to provide HCl-rich sorbent and deplete HCl from the regeneration vent gas to provide HCl-lean regeneration vent gas. HCl-lean regeneration vent gas is purged as an effluent gas. HCl-rich sorbent is passed from the adsorption zone to a sorbent regeneration zone. HCl from the HCl-rich sorbent in the sorbent regeneration zone is desorbed to provide a regenerated sorbent. The regenerated sorbent is transferred to the adsorption zone.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: June 6, 2017
    Assignee: UOP LLC
    Inventors: Clayton C. Sadler, David A. Wegerer, Elizabeth Carter
  • Patent number: 9358495
    Abstract: TSA method for purification by means of adsorption of a synthetic gas including hydrogen, CO and/or methane, implementing at least one adsorber having at least one adsorbent and subjected to a pressure cycle comprising at least an adsorption step, a step of producing a flow enriched with a main component and a regeneration step, characterized in that the regeneration step includes: regenerating the adsorbent using a regeneration gas including more than 95 mol of nitrogen; and scavenging the adsorbent using a scavenging gas corresponding to a fraction of the synthetic gas to be purified or a fraction of the purified synthetic gas.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: June 7, 2016
    Assignee: L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude
    Inventors: Céline Carriere, Christian Monereau, Itziar Urrutia
  • Patent number: 9155978
    Abstract: A very highly concentrated solution is obtained in a single cycle of operation. In the solution separating apparatus, the solution is atomized into the mists to be mixed with the carrier gas, the carrier gas containing such atomized mists is transferred to the collection unit 3, and the collection unit 3 is so constructed and arranged that a specific target substance is separated and collected from the atomized mist component. The solution separating apparatus allows the mist component, by means of the carrier gas, to be in contact with the molecular sieving adsorbent 4 having a molecularly sieving capability of adsorbing the adsorbable component contained in the mist component so as to be separated from the mist component. The non-adsorbable component which is not adsorbed into the molecular sieving adsorbent 4 is separated from the mist component contained in the carrier gas in which the adsorbable component is separated, so that the target substance is separated from the carrier gas.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: October 13, 2015
    Assignee: ULTRASOUND BREWERY
    Inventors: Kazuo Matsuura, Fusatsugu Abe, Tetsuo Fukazu, Taisuke Sekimoto
  • Patent number: 9073003
    Abstract: A system for collecting carbon dioxide from a process gas including an adsorbent material for adsorbing carbon dioxide molecules from the process gas, a dielectric heater proximate the adsorbent material, and a vessel having an internal volume enclosing the adsorbent material and, optionally, the dielectric heater.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: July 7, 2015
    Assignee: The Boeing Company
    Inventors: Tab H. Crooks, D. Anthony Galasso, Jon A. Magnuson
  • Patent number: 9048471
    Abstract: A self-humidifying fuel cell is made by preparing a porous substrate, coating the substrate with a zeolitic material (or a graphene derivative) and filling the pores with a mixture of graphene derivative and proton-conducting material (or a proton-conducting material). The coating of the substrate includes selecting a zeolitic material, and applying coating on the pore walls and surface of the porous substrate, to form zeolitic material-coated pores. The resulting composite material is used as a self-humidifying proton-conducting membrane in a fuel cell.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: June 2, 2015
    Assignee: The Hong Kong University of Science And Technology
    Inventors: King Lun Yeung, Wei Han, Ho Yee Timothy Poon
  • Patent number: 8906138
    Abstract: The present application is directed to a method and system for preparing gaseous utility streams from gaseous process streams, nitrogen process streams, and other types of streams. The methods and systems may include at least one swing adsorption process including pressure swing adsorption, temperature swing adsorption, and rapid-cycle adsorption processes to treat gaseous streams for use in dry gas seals of rotating equipment such as compressors, turbines and pumps and for other utilities. The systems and processes of the present disclosure are further applicable to high pressure gaseous streams, for example, up to about 600 bar.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: December 9, 2014
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Peter C. Rasmussen, Paul L. Tanaka, Bruce T. Kelley, Stanley O. Uptigrove, Harry W. Deckman
  • Publication number: 20140352531
    Abstract: Methods of preparing an impurity-depleted hydrogen stream, methods of analyzing content of an impurity-depleted hydrogen stream from a pressure swing adsorption process, and pressure swing adsorption apparatuses are provided herein. In an embodiment, a method of analyzing content of an impurity-depleted hydrogen stream from a pressure swing adsorption process includes providing a hydrogen-containing feed stream to a pressure swing adsorption zone. The hydrogen-containing feed stream further includes an impurity content including methane and carbon monoxide. Methane and carbon monoxide are adsorbed from the hydrogen-containing feed stream in the pressure swing adsorption zone. The impurity-depleted hydrogen stream is withdrawn from the pressure swing adsorption zone, with the impurity-depleted hydrogen stream having a residual methane content and a residual carbon monoxide content. The residual methane content of the impurity-depleted hydrogen stream is sensed.
    Type: Application
    Filed: May 28, 2013
    Publication date: December 4, 2014
    Applicant: UOP LLC
    Inventor: Kirit M. Patel
  • Patent number: 8747522
    Abstract: In a method for adsorptively drying purified biogas and regenerating laden absorbents, foreign matter is not allowed to enter the purified biogas, the content of methane in the gas remains virtually unchanged and the effort involved in regenerating the laden adsorbent is reduced. Drying and regeneration are effected in a closed biogas cycle, wherein separate layers based on silica gel and molecular sieves are used as the adsorbent. The biogas to be dried first flows through the silica gel layer. The adsorbent is regenerated with exclusively heated, dried biomethane having a temperature of up to 150° C. which, after contact with adsorbent, is recirculated to the outflow of purified biogas. After regeneration, the bed is cooled by biomethane, which is subsequently recirculated to the outflow of purified biogas. Methane-containing water accumulating during drying and regeneration is recirculated to the biogas generation and/or purification.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: June 10, 2014
    Assignee: DGE Dr.-Ing. Guenther Engineering GmbH
    Inventor: Lothar Guenther
  • Patent number: 8658120
    Abstract: Disclosed is a non-thermofusible phenol resin powder having an average particle diameter of not more than 20 ?m and a single particle ratio of not less than 0.7. This non-thermofusible phenol resin powder preferably has a chlorine content of not more than 500 ppm. This non-thermofusible phenol resin powder is useful as an organic filler for sealing materials for semiconductors and adhesives for semiconductors. The non-thermofusible phenol resin powder is also useful as a precursor of functional carbon materials such as a molecular sieve carbon and a carbon electrode material.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: February 25, 2014
    Assignee: Air Water Inc.
    Inventors: Naoto Yoshinaga, Satoshi Ibaraki, Yoshinobu Kodani, Takaomi Ikeda
  • Patent number: 8535417
    Abstract: Carbon dioxide-containing gas such as flue gas and a carbon dioxide-rich stream are compressed and the combined streams are then treated to desorb moisture onto adsorbent beds and then subjected to subambient-temperature processing to produce a carbon dioxide product stream and a vent stream. The vent stream is treated to produce a carbon dioxide-depleted stream which can be used to desorb moisture from the beds, and a carbon dioxide-rich stream which is combined with the carbon dioxide-containing gas.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: September 17, 2013
    Assignee: Praxair Technology, Inc.
    Inventor: Minish Mahendra Shah
  • Patent number: 8349053
    Abstract: A high efficiency gas concentrating apparatus includes an air compressor for supplying high pressure air, first and second adsorption towers that are disposed above the air compressor and communicating with the air compressor to adsorb nitrogen and concentrate oxygen as the high pressure air is alternately supplied thereto, first and second concentrating passages that are disposed above the respective first and second adsorption towers to discharge the concentrated oxygen, and a cleaning tank that is disposed between the first and second concentrating passages to receive a portion of the concentrated oxygen from one of the first and second adsorption towers, temporarily store the received concentrated oxygen therein, and alternately remove adsorbed nitrogen by supplying the temporarily concentrated oxygen to the other of the first and second adsorption towers.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: January 8, 2013
    Assignees: Oxus Co., Ltd., Sogang University Industry-University Cooperation Foundation
    Inventors: Tae Soo Lee, Yoon Sun Choi, Seung Kwon Oh, Shin Kyu Han
  • Publication number: 20130000486
    Abstract: In a method for adsorptively drying purified biogas and regenerating laden absorbents, foreign matter is not allowed to enter the purified biogas, the content of methane in the gas remains virtually unchanged and the effort involved in regenerating the laden adsorbent is reduced. Drying and regeneration are effected in a closed biogas cycle, wherein separate layers based on silica gel and molecular sieves are used as the adsorbent. The biogas to be dried first flows through the silica gel layer. The adsorbent is regenerated with exclusively heated, dried biomethane having a temperature of up to 150° C. which, after contact with adsorbent, is recirculated to the outflow of purified biogas. After regeneration, the bed is cooled by biomethane, which is subsequently recirculated to the outflow of purified biogas. Methane-containing water accumulating during drying and regeneration is recirculated to the biogas generation and/or purification.
    Type: Application
    Filed: March 8, 2011
    Publication date: January 3, 2013
    Applicant: DGE DR.-ING. GUENTHER ENGINEERING GMBH
    Inventor: Lothar Guenther
  • Patent number: 8262771
    Abstract: A flammable gas concentration device comprises an adsorption tower filled by an adsorbent for adsorbing a flammable gas. Raw gas containing air and a flammable gas is fed to the adsorption tower via a feeding path and an exhaust gas in the raw gas which has not been adsorbed to the adsorbent is discharged to an outside of the adsorption tower via a discharge path. Pressure in the adsorption tower is reduced lower than an atmospheric pressure, and the flammable gas adsorbed by the adsorbent is desorbed and collected through a collection path. A flammable gas adsorption step of feeding the raw gas to the adsorption tower and discharging the exhaust gas from the adsorption tower, and a flammable gas desorption step of collecting the desorbed flammable gas are sequentially executed.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: September 11, 2012
    Assignee: Osaka Gas Co., Ltd.
    Inventors: Kenji Seki, Etsuo Shito, Katsuhiko Hirao
  • Patent number: 8075672
    Abstract: Hydroxylamine is formed in a reactor through a partial hydrogenation of nitric oxide gas (NO) with hydrogen gas (H2) in an aqueous medium with nitrogen gas (N2) as an inert gas. The formation of the hydroxylamine forms nitrous oxide gas (N2O). The gases and the water vapor are flowed away from the reactor in a vent gas stream enabling recycling of the gases. The N2O is removed from the vent gas stream to reduce flammability. Once the N2O is removed, the NO, H2, and N2 are recycled and re-used in the reactor to form additional hydroxylamine. The N2O removed from the vent gas stream is of high purity and can be commercially sold or economically discarded.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: December 13, 2011
    Assignee: BASF SE
    Inventors: Naheed Virani, Thomas Seagraves, Wayne David Musselman, William Stewart Chan, Kent S. Knaebel, Heungsoo Shin
  • Patent number: 7959865
    Abstract: The invention relates to a miniaturized gas chromatograph and injector for the same. Said micro-GC is compact and simple and economical to construct. Dead volumes are largely avoided in order to achieve reliable and reproducible measured results. Said miniaturized gas chromatograph comprises at least one injector, one separation column and a detector which are combined on a circuit board to give a gas chromatography module. The injector comprises a first sheet with channels, which is provided with a second sheet with channels and which may be displaced relative to the latter, whereby at least one of the sheets is provided with a layer of plastic, in particular a chemically inert plastic on the side of the sheet facing the other side.
    Type: Grant
    Filed: January 14, 2004
    Date of Patent: June 14, 2011
    Assignee: SLS Micro Technology GmbH
    Inventors: Tobias Schmidt, Mathias Mahnke, Uwe Lehmann
  • Patent number: 7833311
    Abstract: Pressure swing adsorption (PSA) assemblies with temperature-based breakthrough detection systems, as well as to hydrogen-generation assemblies and/or fuel cell systems containing the same, and to methods of operating the same. The detection systems are adapted to detect a measured temperature associated with adsorbent in an adsorbent bed of a PSA assembly and to control the operation of at least the PSA assembly responsive at least in part thereto, such as responsive to the relationship between the measured temperature and at least one reference temperature. The reference temperature may include a stored value, a previously measured temperature and/or a temperature measured elsewhere in the PSA assembly. In some embodiments, the reference temperature is associated with adsorbent downstream from the adsorbent from which the measured temperature is detected.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: November 16, 2010
    Assignee: Idatech, LLC
    Inventor: James A. Givens
  • Patent number: 7799117
    Abstract: A thermal sink is used to recover heat from a product gas leaving an adsorption vessel in a thermal swing adsorption process. Heat that is recovered from the product gas is used to heat a regeneration gas during the subsequent regeneration of the adsorbent material within the adsorption vessel. The step in which the regenerated bed of adsorbent material is cooled prior to returning to adsorption mode is eliminated.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: September 21, 2010
    Assignee: UOP LLC
    Inventors: Lin Li, Mark E. Schott, Andrew S. Zarchy, Bradley P. Russell
  • Patent number: 7722702
    Abstract: The present invention relates to the use of expensive and highly selective adsorbents and catalysts for trace contaminant gas removal to generate products of high and ultra-high purity. Mixing such highly selective materials with other less expensive, less selective materials results in the ability to achieve higher purity, higher capacity and/or lower cost without adding additional expensive selective material.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: May 25, 2010
    Assignee: Praxair Technology, Inc.
    Inventor: Mark William Ackley
  • Patent number: 7694674
    Abstract: An electronic controller (16) controls the operation of an electrochemical oxygen generating system (14) producing a desired gas. The product gas is fed to a storage unit (12) or a regulator (28) and pulsing valve (28) controlling the gas flow to a user. A two-stage system (180) combines a low pressure 100 and a high pressure (150) gas generating subsystems. The low pressure subsystem (100) uses IMAT's (106) to pump oxygen from ambient air to generate a low-pressure. The high pressure subsystem (150) uses IMAT's (160) to pump oxygen to high-pressure oxygen storage devices (194).
    Type: Grant
    Filed: June 12, 2005
    Date of Patent: April 13, 2010
    Assignee: Carleton Life Support Systems, Inc.
    Inventors: Victor P. Crome, Gary N. Byrd, Russell F. Hart, Scott R. Sehlin, Tuan Q. Cao, Courtney Joseph Monzyk, Timothy P. Raleigh, Lyle J. Berkenbosch, Craig L. Schledewitz
  • Publication number: 20100071552
    Abstract: Hydroxylamine is formed in a reactor through a partial hydrogenation of nitric oxide gas (NO) with hydrogen gas (H2) in an aqueous medium with nitrogen gas (N2) as an inert gas. The formation of the hydroxylamine forms nitrous oxide gas (N2O). The gases and the water vapor are flowed away from the reactor in a vent gas stream enabling recycling of the gases. The N2O is removed from the vent gas stream to reduce flammability. Once the N2O is removed, the NO, H2, and N2 are recycled and re-used in the reactor to form additional hydroxylamine. The N2O removed from the vent gas stream is of high purity and can be commercially sold or economically discarded.
    Type: Application
    Filed: September 27, 2006
    Publication date: March 25, 2010
    Inventors: Naheed Virani, Thomas Seagraves, Wayne David Musselman, William Stewart Chan, Kent S. Knaebel, Heungsoo Shin
  • Publication number: 20090293717
    Abstract: The present invention provides a low-cost ozone production method and apparatus for carrying out ozone/oxygen separation using an ozone adsorbent, that re-uses the recovered oxygen as a feed for ozone production, and that desorbs and recovers the adsorbed ozone using dry air. In the method and apparatus, a gas containing an ozone and oxygen two-component gas supplied from an ozone generator is pressurized, introduced into an ozone adsorbent-packed adsorption column, and brought into contact with the adsorbent to adsorb the ozone to the adsorbent. Using dry air as a counterflow purge gas for the adsorbed ozone, the ozone is desorbed from the ozone adsorbent-packed adsorption column loaded with adsorbed ozone by depressurizing the adsorption column or air is introduced as a purge gas from the rear of the column into the adsorbent bed, whereby an ozone and air two-component gas is recovered.
    Type: Application
    Filed: May 29, 2009
    Publication date: December 3, 2009
    Inventors: Jun IZUMI, Hong X. WANG
  • Publication number: 20090282866
    Abstract: A purification method for feed air in cryogenic air separation of the present invention includes purifying the feed air for the cryogenic air separation by using a temperature swing adsorption method, wherein the whole region of a carbon dioxide adsorbent layer packed in an adsorption column is used as a mass transfer zone of a carbon dioxide. Also, a purification apparatus for feed air in cryogenic air separation of the present invention includes at least two adsorption columns; and a moisture adsorbent and a carbon dioxide adsorbent being laminated and packed in the adsorption columns, wherein the packed amount of the carbon dioxide adsorbent is the same as the amount of the carbon dioxide adsorbent in the region of the carbon dioxide adsorbent which a mass transfer zone of a carbon dioxide occupies at the end of an adsorption step, and a temperature swing adsorption method is used.
    Type: Application
    Filed: December 12, 2006
    Publication date: November 19, 2009
    Inventors: Masato Kawai, Morimitsu Nakamura
  • Patent number: 7618594
    Abstract: A nitric oxide delivery system, which includes a gas bottle having nitrogen dioxide in air, converts nitrogen dioxide to nitric oxide and employs a surface-active material, such as silica gel, coated with an aqueous solution of antioxidant, such as ascorbic acid. A nitric oxide delivery system may be used to generate therapeutic gas including nitric oxide for use in delivering the therapeutic gas to a mammal.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: November 17, 2009
    Assignee: GeNO LLC
    Inventors: David R. Rounbehler, David H. Fine
  • Patent number: 7560076
    Abstract: Inhalation of low levels of nitric oxide can rapidly and safely decrease pulmonary hypertension in mammals. A nitric oxide delivery system that converts nitrogen dioxide to nitric oxide employs a surface-active material, such as silica gel, coated with an aqueous solution of antioxidant, such as ascorbic acid.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: July 14, 2009
    Assignee: GENO LLC
    Inventors: David R. Rounbehler, David H. Fine
  • Publication number: 20090165643
    Abstract: Device for drying a compressed gas which consists of a compressed gas supply (2), two pressure vessels (33 and 34) which are provided with an input (37, respectively) and an output (39, 40 respectively) and a take-up point (32) f or users of compressed dried gas, whereby at least two layers of desiccant (35 and 36) are provided in the pressure vessels (33 and 34), a first layer (35) made of a waterproof desiccant and a second layer (36) which is not necessarily made of a waterproof desiccant respectively, and whereby the pressure vessels (33 and 34) are provided with a second input (41, 42 respectively) for the supply of compressed gas to regenerate desiccant from the first layer (35).
    Type: Application
    Filed: March 5, 2007
    Publication date: July 2, 2009
    Inventor: Filip Gustaaf M. Huberland
  • Publication number: 20090000475
    Abstract: Inorganic membrane structures of high stability, high permeability, and large surface area. Zeolite membranes can be disposed onto an intermediate pore size modification layer which reduces the pore size of the inorganic porous support. The intermediate pore size modification layer minimizes the defects in the zeolite membrane and provides a more continuous and uniform zeolite membrane. The inorganic membrane structure can be in the form of a honeycomb monolith. The applications for the zeolite membranes include, for example, membrane ultra-filtration of gas or liquid fluids, biological assays and cell culture surfaces.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 1, 2009
    Inventors: Curtis Robert Fekety, Lyle David Kinney, Wei Liu, Zhen Song
  • Patent number: 7393382
    Abstract: Pressure swing adsorption (PSA) assemblies with temperature-based breakthrough detection systems, as well as to hydrogen-generation assemblies and/or fuel cell systems containing the same, and to methods of operating the same. The detection systems are adapted to detect a measured temperature associated with adsorbent in an adsorbent bed of a PSA assembly and to control the operation of at least the PSA assembly responsive at least in part thereto, such as responsive to the relationship between the measured temperature and at least one reference temperature. The reference temperature may include a stored value, a previously measured temperature and/or a temperature measured elsewhere in the PSA assembly. In some embodiments, the reference temperature is associated with adsorbent downstream from the adsorbent from which the measured temperature is detected.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: July 1, 2008
    Assignee: IDATECH LLC
    Inventor: James A. Givens
  • Patent number: 7285154
    Abstract: A first aspect of a process of recovering xenon from feed gas includes: providing an adsorption vessel containing adsorbent having a Xe/N2 selectivity ratio <75; feeding into the adsorption vessel feed gas having an initial nitrogen concentration >50% and an initial xenon concentration ?0.5%; evacuating the adsorption vessel; and purging the adsorption vessel at a purge-to-feed ratio ?10. The final xenon concentration is ?15× the initial xenon concentration. A second aspect of the process includes providing an adsorption vessel containing adsorbent having a Xe Henry's law Constant ?50 mmole/g/atm; feeding into the adsorption vessel feed gas having an initial nitrogen concentration >50% and an initial xenon concentration ?0.5%; heating and purging the adsorption vessel to recover xenon having a final concentration ?15× its initial concentration. Apparatus for performing the process are also described.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: October 23, 2007
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Eugene Joseph Karwacki, Jr., Timothy Christopher Golden, Bing Ji, Stephen Andrew Motika, Thomas Stephen Farris
  • Patent number: 7022159
    Abstract: A process and an apparatus related to the reduction of the level of a component in a feed gas such as air involving passing the gas to at least three parallel thermal swing adsorption zones charged with an adsorbent and operating according to an adsorption cycle, wherein the cycle of each zone is phased with respect to that of the other zones so that at any point during the cycle, the number of zones in the adsorption step is greater than the number of zones not in the adsorption step.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: April 4, 2006
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Mohammad Ali Kalbassi, Paul Higginbotham
  • Patent number: 6955710
    Abstract: Method and system on board an aircraft for the production of an oxygen-enriched gas stream from an oxygen/nitrogen gas mixture, particularly air, comprising at least one adsorber containing at least one adsorbent for adsorbing at least some of the nitrogen molecules contained in the oxygen/nitrogen feed mixture, characterized in that the adsorbent comprises a faujasite-type zeolite, having a Si/Al ratio of 1 to 1.50, exchanged to at least 80% with lithium cations. Aircraft equipped with such a system, in particular an airliner, especially an airliner of the long-range, large-capacity type.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: October 18, 2005
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et, l 'Exploitation des Procedes Georges Claude
    Inventors: Stéphane Lessi, Richard Zapata, Jean-Michel Cazenave, Jean Dehayes
  • Patent number: 6936091
    Abstract: A valve assembly for use in a gas purification system having a plurality of vessels each having a first port opening and a second port opening. The gas purification system includes a first valve element having a first aperture to selectively connect a first port opening of a vessel to an outlet of the first valve element. The gas purification system also includes a second valve element having a second aperture to selectively connect a second port opening of a vessel to an input of the second valve element. Also provided are a motor adapted to rotate continuously and a converting mechanism that converts continuous movement of the motor into intermittent movement. The first and second valve elements are intermittently moved by the motor and the converting mechanism such that the intermittent movement changes the vessel connected to the second aperture and the vessel connected to the first aperture.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: August 30, 2005
    Assignee: Metso Automation USA, Inc.
    Inventor: David Bayreuther
  • Patent number: 6916359
    Abstract: Methods of providing ozone at a selected pressure above atmospheric pressure include supplying a purge gas supply (22) pressurized above the selected pressure to at least one ozone adsorption apparatus (12); desorbing ozone from the ozone adsorption apparatus (12) with the pressurized purge gas supply (22); and delivering a mixture of ozone and the purge gas supply (24) at the selected pressure without further compression.
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: July 12, 2005
    Assignee: The BOC Group, Inc.
    Inventor: Ravi Jain
  • Patent number: 6913638
    Abstract: Product gas (Gpro) is separated from material gas (Gmat) by a PSA process utilizing a plurality of adsorption towers (A-C) each loaded with an adsorbent. The separation of the product gas (Gpro) is performed by repeating a cycle comprising an adsorption step, a decompression step, a desorption step, a cleaning step and a pressurization step. In the decompression step, remaining gas (Grem) as cleaning gas is introduced from one adsorption tower (C) to another adsorption tower (B). The amount of the remaining gas (Grem) introduced is 2 to 7 times the volume of the adsorbent loaded in the adsorption tower (B) as converted into volume at common temperature and under atmospheric pressure. To remove both of carbon monoxide and carbon dioxide from the material gas (Gmat) by a single kind of adsorbent, use is made of zeolite having a faujasite structure with a Si/Al ratio lying in a range of 1 to 1.5 and a lithium-exchange ratio of no less than 95%.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: July 5, 2005
    Assignee: Sumitomo Seika Chemicals Co., Ltd.
    Inventors: Toshihiko Sumida, Hiroaki Sasano, Masanori Miyake
  • Patent number: 6905535
    Abstract: A gas separation system for separating a feed gas mixture into a first gas component and a second gas component comprises a stator, and a rotor rotatably coupled to the stator. The stator includes a first stator valve face, a second stator valve surface, and a plurality of function compartments opening into the stator valve surfaces. The rotor includes a first rotor valve surface in communication with the first stator valve surface, and a second rotor valve surface in communication with the second stator valve surface. The rotor also includes a plurality of rotor flow paths for receiving gas adsorbent material therein for preferentially adsorbing the first gas component in response to increasing pressure in the rotor flow paths in comparison to the second gas component. Each rotor flow path includes a pair of opposite ends opening into the rotor valve faces for communication with the function compartments.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: June 14, 2005
    Assignee: QuestAir Technologies Inc.
    Inventors: Bowie G. Keefer, Kevin A. Kaupert
  • Patent number: 6849106
    Abstract: Conducting a PSA process for the purification of gaseous hydrogen contaminated at least with CO and N2 of the H1 where the gas stream to be purified is passed through an adsorption region comprising at least one adsorbent based on zeolite 5A and one adsorbent based on zeolite X exchanged with calcium.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: February 1, 2005
    Assignee: CECA S.A.
    Inventor: Remi Le Bec
  • Patent number: 6811590
    Abstract: A gas concentrating method and apparatus is provided in which equalization is accomplished below two sieve beds, to thereby save compression energy, to reduce exit noise, and to obtain a gas whose gas purity with respect to an amount of flow has been enhanced. The gas concentrating method makes two sieve beds communicate with each other at their bottoms when a pressure difference between a pressurized pressure and a decompressed pressure is maximized in the multi-bed type sieve beds which alternately operate between pressurization and decompression, to equalize an internal pressure in the sieve beds. The gas concentrating apparatus includes a compressor (50), sieve beds (60-1, 60-2), solenoid valves (40-1, 40-2), an orifice (90), check valves (90-1, 90-2), a storage tank (100), a pressure controller (70), a flow meter (80), a controller (110), and a muffler (20).
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: November 2, 2004
    Assignee: Oxus Co., Ltd.
    Inventors: Tae Soo Lee, Yoon Sun Choi
  • Patent number: 6802889
    Abstract: Rapid cycle pressure swing adsorption processes, systems and apparatus for the separation of a multi-component feed gas mixture by selectively adsorbing at least one more readily adsorbable component in a bed of adsorbent material are provided.
    Type: Grant
    Filed: December 5, 2002
    Date of Patent: October 12, 2004
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David Ross Graham, James Michael Occhialini, Pushpinder Singh Puri
  • Patent number: 6790260
    Abstract: High product recovery and low BSF are achieved for fast-cycle shallow adsorbers in VPSA gas separation enabled by the coupled effects of high intrinsic adsorption rate and proper particle size selection.
    Type: Grant
    Filed: October 3, 2001
    Date of Patent: September 14, 2004
    Assignee: Praxair Technology, Inc.
    Inventors: Mark William Ackley, James Smolarek
  • Patent number: 6709483
    Abstract: A carbon dioxide (CO2) adsorption membrane or bed is operative to separate metabolic CO2 from an exhaust stream from a breathable atmosphere which is discharged from a closed habitable environment. The habitable environment is in a low ambient pressure surrounding. A portion of the scrubbed exhaust gas stream is diverted from the habitable environment and passed through a desorption chamber. The desorption chamber is open to the low ambient pressure surrounding to maintain a pressure which is slightly greater than the pressure in the ambient surrounding so that the desorption chamber gas stream will exit the system into the ambient surroundings. When the diverted exhaust gas enters the low pressure desorption pressure chamber its CO2 partial pressure content is reduced. The reduced CO2 partial pressure content of the gas stream in the desorption chamber enables the desorption chamber gas stream to remove CO2 from the adsorption membrane or bed.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: March 23, 2004
    Assignee: Hamilton Sundstrand Corp.
    Inventor: Edward W. Hodgson, Jr.
  • Patent number: RE40006
    Abstract: Pressure swing adsorption (PSA) separation of a gas mixture is performed in an apparatus with a plurality of adsorbent beds. The invention provides rotary multiport distributor valves to control the timing sequence of the PSA cycle steps between the beds, with flow controls cooperating with the rotary distributor valves to control the volume rates of gas flows to and from the adsorbent beds in blowdown, purge, equalization and repressurization steps.
    Type: Grant
    Filed: April 12, 2004
    Date of Patent: January 22, 2008
    Assignee: QuestAir Technologies Inc.
    Inventors: Bowie G. Keefer, David G. Doman
  • Patent number: RE38493
    Abstract: Pressure swing adsorption (PSA) separation of a gas mixture is performed in an apparatus with a plurality of adsorbent beds. The invention provides rotary multiport distributor valves to control the timing sequence of the PSA cycle steps between the beds, with flow controls cooperating with the rotary distributor valves to control the volume rates of gas flows to and from the adsorbent beds in blowdown, purge, equalization and repressurization steps.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: April 13, 2004
    Assignee: QuestAir Technologies Inc.
    Inventors: Bowie G. Keefer, David G. Doman