Heating Or Cooling Patents (Class 95/120)
  • Patent number: 9700747
    Abstract: Systems and methods for removal of gas phase contaminants may utilize catalytic oxidation. For example, a method may include passing a gas that includes a gas phase contaminant through a catalytic membrane reactor at a temperature of about 150° C. to about 300° C., wherein the catalytic membrane reactor includes a bundle of tubular inorganic membranes, wherein each of the tubular inorganic membranes comprise a macroporous tubular substrate with an oxidative catalyst and a microporous layer disposed on a bore side of the macroporous tubular substrate, and wherein at least about 50% of the gas flows through the tubular inorganic membranes in a Knudsen flow regime; and oxidizing at least some of the gas phase contaminant with the oxidative catalyst layer, thereby reducing a concentration of the gas phase contaminant in the gas.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: July 11, 2017
    Inventors: Theodore T. Tsotsis, Fokion Egolfopoulos, Nitin Nair, Richard Prosser, Jyh-Yih Ren, Alireza Divsalar, Mirmohammadyousef Motamedhashemi, Majid Monji
  • Patent number: 9433890
    Abstract: In a dehydration equipment, a regenerative gas heater heats a portion of CO2 gas dehydrated in an adsorption tower that is performing an adsorption process and supplies the gas to an adsorption tower that is performing a regeneration process. A regenerative gas preheater performs heat exchange between the CO2 gas that will be supplied to a regenerative gas heater and the CO2 gas sent out from the adsorption tower that is performing the regeneration process. Then, in the dehydration equipment, a regenerative gas cooler cools the CO2 gas that has been sent out from the adsorption tower that is performing the regeneration process and exchanged heat, separates water from the cooled CO2 gas, and returns the resulting gas to the adsorption tower. Thus, the dehydration equipment can prevent an increase in utility consumption due to the regeneration process.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: September 6, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Masayuki Inui, Takahito Yonekawa, Koji Nakayama, Tatsuya Tsujiuchi, Yoshiki Sorimachi
  • Patent number: 8888895
    Abstract: A method for the removal of H2O and CO2 from a gaseous stream comprising H2O and CO2, such as a flue gas. The method initially utilizes an H2O removal sorbent to remove some portion of the H2O, producing a dry gaseous stream and a wet H2O removal sorbent. The dry gaseous stream is subsequently contacted with a CO2 removal sorbent to remove some portion of the CO2, generating a dry CO2 reduced stream and a loaded CO2 removal sorbent. The loaded CO2 removal sorbent is subsequently heated to produce a heated CO2 stream. The wet H2O removal sorbent and the dry CO2 reduced stream are contacted in a first regeneration stage, generating a partially regenerated H2O removal sorbent, and the partially regenerated H2O removal sorbent and the heated CO2 stream are subsequently contacted in a second regeneration stage.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: November 18, 2014
    Assignee: U.S. Department of Energy
    Inventors: James C. Fisher, Ranjani V. Siriwardane, David A. Berry, George A. Richards
  • 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: 8580010
    Abstract: A dew point temperature sensor detects and sends the dew point temperature of the supply air to a dry area, as a supply air dew point temperature, to a controller. The controller has a speed of rotation of the regenerating side fan (the regenerating air flow rate) to control, and determines a control value (the regenerating air flow rate) that causes the supply air dew point temperature to go to a target dew point temperature, and determines a supply air processing pre-cooling coil exit temperature setting value in accordance with this control value (where if the control value is in the direction of reducing the regenerating air flow rate, the supply air processing pre-cooling coil exit temperature setting value is increased). Note that what is controlled is the speed of rotation of the desiccant rotors, or the exit temperatures of the air heated by the hot water coils.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: November 12, 2013
    Assignee: Azbil Corporation
    Inventors: Tadahiko Matsuba, Naofumi Ushioda, Yoshitaka Takakura
  • Patent number: 8425660
    Abstract: A method by which water may be extracted from the air even without a supply of electricity from a power source or even without a supply of fuel, as well as an apparatus therefor, is disclosed. The apparatus used for the method for extracting water from the air comprises at least a rotatably mounted hygroscopic moisture-absorbing rotor having at least one region through which air can pass in the direction of thickness thereof; a passage for regeneration through which air for regeneration is circulated, of which both ends are opened at the opposing two surfaces of a regeneration region, respectively, the regeneration region being a part of the moisture-absorbing rotor, at which the moisture-absorbing rotor that absorbed moisture is regenerated; and a drain hole for taking out condensed water from the passage for regeneration.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: April 23, 2013
    Assignee: Kankyo Co., Ltd.
    Inventors: Hidetoshi Ike, Nao Okuhata
  • Patent number: 8409331
    Abstract: The invention relates to auxiliary systems ensuring functioning of alkaline fuel cell (AFC), in particular to a method and device for sorptive purification of air used in an AFC of carbon dioxide. In accordance with the invention, in the method for purifying air for a fuel cell, the starting air is passed through an adsorber with an adsorbent of carbon dioxide, then the adsorbent is regenerated. After utilization the adsorbent comprising hydrated oxides of transition metals is regenerated at a temperature of 60-120° C. by the air spent in the fuel cell.
    Type: Grant
    Filed: November 4, 2003
    Date of Patent: April 2, 2013
    Assignee: Obschestvo S Ogranichennoi Otvetstvennostiyu “Intensis”
    Inventors: Ziya Ramizovich Karichev, Dmitry Alexandrovich Blatov, Stanislav Iliich Simanenkov, Valentina Nikolaevna Shubina
  • Patent number: 8366806
    Abstract: A hydrocarbon adsorbent that includes a zeolite with either a H-FER structure or a MOR structure in which the pore diameter has been adjusted by ion exchange. A propane adsorbent that includes a zeolite with a MFI structure having a Si/Al ratio of no more than 20. A hydrocarbon removal unit that includes a TSA pre-purification unit having a column packed with sequential layers of activated alumina, a NaX zeolite, and the hydrocarbon adsorbent. A method of reducing the hydrocarbon content within liquid oxygen inside a cryogenic air separation unit that includes purifying feed air with the above pre-purification unit.
    Type: Grant
    Filed: December 29, 2010
    Date of Patent: February 5, 2013
    Assignee: Taiyo Nippon Sanso Corporation
    Inventors: Tatsuya Hidano, Morimitsu Nakamura, Masato Kawai
  • Patent number: 8268030
    Abstract: The invention provides wind energy use. One application provides wind energy use for water harvesting from natural humid air. The method is based on changing thermodynamic state parameters of ambient wind air portions passed through a device comprising convergent-divergent and wing-like components. Those components transform the ambient wind portions into fast and cooled outflowing air portions. A decrease in static pressure and temperature triggers condensation of water-vapor into water-aerosols. Another application of the method provides an effective mechanism for harvesting electrical energy from naturally warm air using renewable wind energy, including the wind inertia, internal heat, and potential energy stored in the air mass in the Earth's gravitational field. The electrical energy harvesting mechanism is also applicable to use of natural renewable energy of streaming water.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: September 18, 2012
    Inventor: Yuri Abramov
  • Patent number: 8226916
    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: November 17, 2011
    Date of Patent: July 24, 2012
    Assignee: Geno LLC
    Inventors: David R. Rounbehler, David H. Fine
  • Patent number: 8221514
    Abstract: The invention provides an ecologically clean method and apparatus for water harvesting from air. The method is based on changing of thermodynamic state properties of air wind getting a rotation and passing through convergent-divergent nozzles. The apparatus is a water condensation engine exposed to humid wind. The constructive solution has no moving solid parts, and the incoming wind is an inherent moving component of the engine. It comprises a cascade of sequentially arranged horn-tubes and a set of stationary wing-like details. Those horn-tubes transform the wind into a fast and cooled out-flowing air flux coming-and-hitting upon the set of wing-like details, where the air portions are accelerated and eddying. The inner static pressure and temperature decrease in the air portions. The decrease in static pressure and temperature triggers off condensation of water-vapors into water-aerosols.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: July 17, 2012
    Assignee: Yuri Abramov
    Inventor: Yuri Abramov
  • Patent number: 8211211
    Abstract: Methane product gas is produced from landfill gas and gob gas either by a three-stage process of PSA-TSA-PSA or PSA-PSA-PSA, or a two-stage process of PSA-PSA.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: July 3, 2012
    Assignee: Kent S. Knaebel & Associates, Inc.
    Inventor: Kent S. Knaebel
  • Patent number: 8211368
    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: May 23, 2011
    Date of Patent: July 3, 2012
    Assignee: Geno LLC
    Inventors: David H. Fine, David P. Rounbehler, Gregory B. Vasquez
  • Patent number: 8197581
    Abstract: A self-regenerating bio-gas treatment system that uses the bio-gas instead of atmospheric are as media transport between adsorber and desorber tanks. Each tank includes at least four horizontally stacked and evenly spaced apart, perforated trays each capable being filled with fluidized carbon which migrates downward in the adsorber tank to remove contaminants from the bio-gas. With the bio-gas function as its media transport, the carbon media continuously moves downward over the perforated trays and eventually collected in the bottom of the adsorber tank. The spent carbon is then delivered to the desorber tank. The desorber tank is filled with an inert gas produced by an inert gas generator which causes the carbon media to be regenerated. The inert gas strips the carbon media of contaminates and is then delivered to a ground flare. The carbon media is returned to the adsorber tank and re-used to treat bio-gas.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: June 12, 2012
    Assignee: ESC Enviroenergy, LLC
    Inventor: Lowell Howard
  • Publication number: 20120097029
    Abstract: A water recovery system includes a sorbing bed, a desorbing bed, a heat pump and a controller. The sorbing bed receives a first fluid stream and absorbs and/or adsorbs water from the first fluid stream. The desorbing bed is aligned with and thermally connected to the sorbing bed, and receives a second fluid stream and desorbs water to the second fluid stream. The heat pump is positioned between the sorbing bed and the desorbing bed and transfers heat from the sorbing bed to the desorbing bed. The controller distributes power to the heat pump to maintain an area near the outlet of the desorbing bed at a temperature greater than an area of the sorbing bed aligned with the area near the outlet of the desorbing bed. A method for recovering water from a fluid stream includes directing fluid streams through the described water recovery system.
    Type: Application
    Filed: October 26, 2010
    Publication date: April 26, 2012
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Edward W. Hodgson, William G. Papale, JR.
  • Patent number: 7947227
    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 21, 2008
    Date of Patent: May 24, 2011
    Assignee: Geno LLC
    Inventors: David H. Fine, David P. Rounbehler, Greg Vasquez
  • Patent number: 7931736
    Abstract: A hydrocarbon adsorbent that includes a zeolite with either a H-FER structure or a MOR structure in which the pore diameter has been adjusted by ion exchange. A propane adsorbent that includes a zeolite with a MFI structure. A hydrocarbon removal unit that includes a TSA pre-purification unit having a column packed with sequential layers of activated alumina, a NaX zeolite, and the hydrocarbon adsorbent. A method of reducing the hydrocarbon content within liquid oxygen inside a cryogenic air separation unit that includes purifying feed air with the above pre-purification unit.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: April 26, 2011
    Assignee: Taiyo Nippon Sanso Corporation
    Inventors: Tatsuya Hidano, Morimitsu Nakamura, Masato Kawai
  • Patent number: 7866176
    Abstract: An autonomous water source for extracting water from ambient air and delivering it to a plant to support growth. The system is based on an adsorption-desorption-condensation cycle using a sorption material to extract moisture from ambient air and condensing the water vapor driven off from the sorption material by subsequent heating and followed by condensation. Liquid condensate produced in this process on the condenser is collected and delivered by gravity to a plant to reduce thermal stress and to support growth. The invention provides a sustainable source of irrigation water for agriculture and forestry, including areas where no water resources exist or are not economically viable. It can be tailored in size, and therefore, output capacity, reflecting the desired water requirements of a particular application, and can be used to replace most agricultural situations now reliant on surface water drip feed systems.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: January 11, 2011
    Assignee: Aqwest LLC
    Inventors: Jan Vetrovec, Katerina Vetrovec
  • Patent number: 7763174
    Abstract: The present invention pertains to a reverse-flow reactor comprising at least one catalyst bed which is preceded and followed by at least one bed containing selectively adsorbing material, and its application for in a process for the removal of contaminants from a process stream.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: July 27, 2010
    Assignee: Shell Oil Company
    Inventors: Alouisius Nicolaas Renée Bos, Girish Rajkumar Kabra, Jean-Paul Lange
  • Publication number: 20100132548
    Abstract: A process for dehydration of a water rich stream, the process comprising providing a process stream to a first temperature controlled adsorber that is undergoing adsorption, where the first temperature controlled adsorber has one or more adsorption flow passages containing an adsorptive material coating and one or more heat transfer flow passages and producing a dehydrated effluent stream. The process stream is passed through the one or more adsorption flow passages, where water is adsorbed by the adsorptive material coating, and a heat of adsorption is generated. The heat of adsorption is removed by passing a cooling fluid through the one or more heat transfer flow passages. The process stream can be a process stream for producing motor fuel grade ethanol.
    Type: Application
    Filed: December 17, 2008
    Publication date: June 3, 2010
    Inventors: Stephen R. Dunne, David A. Wegerer
  • 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
  • Patent number: 7467523
    Abstract: An autonomous water source (AWS) for extracting water from ambient air and delivering it to a plant to support growth. The system is based on an adsorption-desorption-condensation (ADC) cycle using a sorption material to extract moisture from ambient air and condensing the water vapor driven off from the sorption material by subsequent heating and followed by condensation. Liquid condensate produced in this process on the condenser is collected and delivered by gravity to a plant to reduce thermal stress and to support growth. The invention provides a sustainable source of irrigation water for agriculture and forestry, including areas where no water resources exist or are not economically viable. It can be tailored in size, and therefore, output capacity, reflecting the desired water requirements of a particular application, and can be used to replace most agricultural situations now reliant on surface water drip feed systems.
    Type: Grant
    Filed: May 4, 2004
    Date of Patent: December 23, 2008
    Assignee: Aqwest, LLC
    Inventors: Jan Vetrovec, Katerina Vetrovec
  • Publication number: 20080202339
    Abstract: A carbon dioxide (CO2) removal system includes a first sorbent bed and a second sorbent bed. Each of the first and second sorbent beds has a molecular sieve sorbent for adsorbing or desorbing CO2. One of the sorbent beds adsorbs CO2 and the other of the sorbent beds desorbs CO2. The first and second sorbent beds are thermally connected to transfer heat between the sorbent beds.
    Type: Application
    Filed: February 26, 2007
    Publication date: August 28, 2008
    Applicant: Hamilton Sunstrand Corporation
    Inventors: Timothy A. Nalette, Tony Rector
  • Patent number: 7273512
    Abstract: Process for drying wet F32, which comprises placing a stream of the said F32 in continuous contact with a feed stock of a composition comprising a molecular sieve chosen from a 3A type sieve, at a temperature of between 5 and 78° C. and at a pressure of between 0.5 and 25 atm.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: September 25, 2007
    Assignee: Elf Atochem S.A.
    Inventor: Rene Bertocchio
  • Patent number: 7166149
    Abstract: Using a high pressure rotary adsorbent wheel, a high value compressed gas feed can be purified by concentrating the impurity such as water, condensing it out, before final purification. Instead of exhausting gas from the system, the effluent can be put back into the feed at a point prior to condensation of the high value gas feed, and therefore the entire feed is purified without any high value gas feed going into a waste stream.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: January 23, 2007
    Assignee: UOP LLC
    Inventors: Stephen R. Dunne, Peter K. Coughlin, Rustam H. Sethna
  • Patent number: 7101415
    Abstract: A continuous method of producing a process fluid gas from a feed stream that includes the process fluid and impurities. The method includes: (a) providing a first and second vessel, each vessel containing one or more regenerable purifier materials for removing at least one of the impurities from the feed stream; (b) removing at least one of the impurities by passing the feed stream through one or the other of the vessels to provide a purified process fluid gas, with the vessel being maintained at a first temperature during the removal of impurities; and (c) regenerating the purifier materials in the vessels at a second temperature and during the time when it is not purifying the feed stream by flowing a portion of the purified process fluid or the feed stream or a separate source of the process fluid gas therethrough.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: September 5, 2006
    Assignee: Matheson Tri-Gas, Inc.
    Inventors: Robert Torres, Jr., Joseph Vivinski, David Lawrence
  • Patent number: 7101414
    Abstract: A method of reducing the sorbate concentration of a process fluid stream using a sorption bed system includes the following steps. A mass of a sorbent material is rotated so that, in a cycle of operation, a given volume of the sorbent mass sequentially passes through first, second, third, fourth, fifth, and sixth zones, before returning to the first zone. A process fluid stream is passed through the sorbent mass in the first zone, and a regeneration fluid stream is passed through the sorbent mass in the fourth zone. A first isolation fluid stream is recycled in a closed loop, independent of the process fluid stream and the regeneration fluid stream, between the sorbent mass in the second zone and in the sixth zone. A second isolation fluid stream, meanwhile, is recycled in a closed loop, independent of the process fluid stream, the regeneration fluid stream, and the first isolation fluid stream, between the sorbent mass in the third zone and in the fifth zone.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: September 5, 2006
    Assignee: Munters Corporation
    Inventors: Paul A. Dinnage, Stephen C. Brickley
  • Patent number: 7080505
    Abstract: A vehicular atmosphere cleansing system utilizes a regenerative wheel having flow channels extending through the wheel coated with an adsorbant. An atmosphere stream passes through a first position dependent portion of the wheel where VOC's including HC's are adsorbed while a heated atmosphere stream passes through a second position dependent regenerative portion of the wheel whereat VOC's are desorbed. The adsorbant is activated carbon having particles of micropore size adhered to the substrate by a silicone binder producing high adsorption efficiencies while withstanding relatively high regenerative heat temperatures resulting from exhaust gas sensible heat. A hydrocarbon senses HC in the desorbed heated atmosphere stream to rotatively and sequentially index pie shaped, segmented portions of the wheel into the wheel's regenerative region while also functioning as the main component of an OBD device for the system.
    Type: Grant
    Filed: July 8, 2003
    Date of Patent: July 25, 2006
    Assignee: Engelhard Corporation
    Inventors: Gerald S. Koermer, Jeffrey B. Hoke, Ronald M. Heck, Terence C. Poles, Edward T. Wolynic
  • Patent number: 7066986
    Abstract: An adsorber vessel for use in the adsorption of a component from a gas and subsequent regeneration by thermally induced desorption of the component comprises an inlet for regeneration gas having an inlet nozzle containing at least one heater element, and an outlet for regeneration gas, the inlet and outlet for regeneration being separated by a flow path including a flow chamber containing a body of adsorbent, and wherein the body of adsorbent has a first end which is adjacent the inlet for regeneration gas and a second end which is remote from the inlet for regeneration gas, and the or each heater element is located so as not to penetrate through the first end of the body of adsorbent.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: June 27, 2006
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Christopher Richard Haben, Mohammad Ali Kalbassi, Declan Patrick O'Connor
  • Patent number: 7037360
    Abstract: An adsorbent for regenerator systems, to a heat utilization system and a regenerator system that comprise the adsorbent, and to a ferroaluminophosphate and a method for production thereof. More precisely, the invention relates to an adsorbent favorable for regenerator systems, which efficiently utilizes the heat source obtainable from cars and the like to thereby realize efficient regenerator systems, to a regenerator system that comprises the adsorbent, to a ferroaluminophosphate to be the adsorbent favorable for regenerator systems, and to a method for production thereof.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: May 2, 2006
    Assignees: Mitsubishi Chemical Corporation, Denso Corporation
    Inventors: Kouji Inagaki, Atsushi Kosaka, Satoshi Inoue, Yasukazu Aikawa, Takahiko Takewaki, Masanori Yamazaki, Hiromu Watanabe, Hiroyuki Kakiuchi, Miki Iwade
  • 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: 7014683
    Abstract: A method for the regeneration of humidity-laden drying cartridges includes heating to 220 to 300° C. and introducing it into a drying cartridge for regeneration. Subsequent cooling of the drying cartridge is achieved by a partial stream of air diverted from the dried process air. An arrangement suitable for carrying out the method is also disclosed.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: March 21, 2006
    Assignee: Wittmann Robot Systeme GmbH
    Inventor: Andreas Vierling
  • Patent number: 6984258
    Abstract: Method and apparatus for treating a gas by adsorption. A gas is compressed and then treated by being circulated in an adsorber. A regenerating fluid is indirectly heated by the gas coming from the compressor. In a second regeneration phase, the regenerating fluid is sent directly to the adsorber, while the treated gas is refrigerated by an auxiliary refrigerator.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: January 10, 2006
    Assignee: L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés Georges Claude
    Inventors: Norbert Niclout, Marc Wagner
  • Patent number: 6911066
    Abstract: A method for operating a typical cyclic adsorption unit that is easily implemented in both new and existing treatment plants, wherein fluctuations in the stream compositions due to the adsorption and regeneration phase transitions of the cycles are minimized.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: June 28, 2005
    Assignee: L'Air Liquide, Société Anonyme á Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés Georges Claude
    Inventor: Christian Monereau
  • Patent number: 6729039
    Abstract: A method and an apparatus for controlling airflow in a desiccant drying system having two desiccant beds (10, 12). A first diverter valve (14) communicates with each of the desiccant beds, a regeneration air inlet (22), and a press air outlet (20). A second diverter valve (16) communicates with each of the desiccant beds, a process air inlet (18), and a regeneration air outlet (28). First and second regeneration air control valves (24, 30) are also provided which during a cooling phase of the regeneration cycle admit a cooling bleed stream of process air to the desiccant bed being regenerated and then convey the cooling air bleed stream from the desiccant bed and through a heat exchanger (42) back to the process air inlet.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: May 4, 2004
    Assignee: Universal Dynamics, Inc.
    Inventor: Robert R. Crawford
  • Patent number: 6723155
    Abstract: A method for removing a first and a second minor component from a gas mixture comprising the first and second minor components and one or more major components. The method comprises providing a first adsorbent zone containing a first adsorbent material and a second adsorbent zone containing a second adsorbent material wherein the selectivity of the first adsorbent material for the first minor component relative to the second minor component is greater than the selectivity of the second adsorbent material for the first minor component relative to the second minor component. The average particle diameter of the first adsorbent material and the average particle diameter of the second adsorbent material preferably are substantially the same. The gas mixture is passed through the first adsorbent zone and subsequently through the second adsorbent zone. A purified gas containing the one or more major components and depleted in the first and second minor component is withdrawn from the second adsorbent zone.
    Type: Grant
    Filed: April 29, 2002
    Date of Patent: April 20, 2004
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Gregory Scott Weyrich, Shyam Ramchand Suchdeo, Christopher James Raiswell, Elizabeth Helen Salter
  • Patent number: 6719827
    Abstract: The present invention relates to a process and apparatus for the removal of nitrous oxide from a feed gas stream using an adsorbent having a nitrogen diffusion parameter of 0.12 sec−1 or higher and a nitrous oxide capacity of 79 mmol/g/atm or higher at 30° C.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: April 13, 2004
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Timothy Christopher Golden, Fred William Taylor, Elizabeth Helen Salter, Mohammad Ali Kalbassi, Christopher James Raiswell
  • Patent number: 6652628
    Abstract: Desiccants employed in dehumidifying moisturized air present within a water-damaged building are themselves dehumidified to liberate collected moisture through the use of ambient air drawn over and about a heat exchanger fired by diesel fuel.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: November 25, 2003
    Inventor: Spencer W. Hess
  • Patent number: 6607582
    Abstract: The air distillation unit (2) has a low-pressure column (11C) which operates clearly above atmospheric pressure. The waste nitrogen coming from this column serves to purge, under low pressure, the air purification adsorbers (10A, 10B) in order to desorb them of the contaminants (water and CO2), then is mixed with the impure nitrogen stream sent directly to the nitrogen compressor (14) which feeds the combustion chamber (8) of the gas turbine (1). At the start of regeneration, each adsorber is decompressed down to atmospheric pressure, then brought back up to the low pressure by impure nitrogen.
    Type: Grant
    Filed: April 9, 2002
    Date of Patent: August 19, 2003
    Assignee: L'Air Liquide - Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Giovanni Massimo, Jean Marc Peyron
  • Patent number: 6599347
    Abstract: A method of operating a thermal swing adsorption process by determining a parameter relating to the water content of a feed gas, selecting process conditions for regeneration of the adsorbent in the thermal swing adsorption process based on the parameter and modifying the regeneration process conditions to accord with the selected process conditions for regeneration is disclosed. Apparatus for effecting this adsorption method and apparatus in which regeneration conditions are modified based on the actual ambient water content of the feed gas are also disclosed.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: July 29, 2003
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Mohammad Ali Kalbassi, Nasim Hassan Malik
  • Patent number: 6576044
    Abstract: A gas mixture comprised of nitric oxide and one or more impurities selected from nitrous oxide, nitrogen dioxide, nitrous acid, sulfur dioxide, carbonyl sulfide, water vapor and carbon dioxide is purified by pressure swing adsorption or temperature swing adsorption using a porous, metal-free polymer adsorbent that does not promote the disproportionation of nitric oxide to nitrogen dioxide and nitrogen or nitrous oxide. The adsorption step is preferably carried out at tempereatures in the range of about −120 to about 0° C.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: June 10, 2003
    Assignee: The BOC Group, Inc.
    Inventors: Dustin Wenpin Ho, Deming Tang, Walter H. Whitlock
  • Publication number: 20030029315
    Abstract: The present invention describes a pressure swing adsorption (PSA) apparatus and process for the production of purified hydrogen from a feed gas stream containing heavy hydrocarbons (i.e., hydrocarbons having at least six carbons). The apparatus comprises at least one bed containing at least three layers. The layered adsorption zone contains a feed end with a low surface area adsorbent (20 to 400 m2/g) which comprises 2 to 20% of the total bed length followed by a layer of an intermediate surface area adsorbent (425 to 800 m2/g) which comprises 25 to 40% of the total bed length and a final layer of high surface area adsorbent (825 to 2000 m2/g) which comprises 40 to 78% of the total bed length.
    Type: Application
    Filed: October 8, 2002
    Publication date: February 13, 2003
    Inventors: Timothy Christopher Golden, Edward Landis Weist
  • Patent number: 6471749
    Abstract: The present invention relates to a gas purification method for adsorbing and removing impurities by PSA method combined with heating, capable of removing water vapor and carbon dioxide in an economical and effective way.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: October 29, 2002
    Assignee: Nippon Sanso Corporation
    Inventors: Masato Kawai, Morimitsu Nakamura, Shigeo Tooyama
  • Patent number: 6432171
    Abstract: The present invention provides for a thermal swing adsorption process for the removal of trace impurities such as oxides of nitrogen and hydrocarbons from air prior to its separation by cryogenic distillation. The process may utilize three adsorbent layers, the first primarily removes water; the second primarily removes carbon dioxide; and the third layer is a composite adsorbent layer which removes the oxides of nitrogen and hydrocarbons from the air stream. Another embodiment employs a two layer adsorbent system to remove the impurities. Additionally, a single layer of composite adsorbent may be used to remove water, carbon dioxide, oxides of nitrogen, and hydrocarbons from the air stream.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: August 13, 2002
    Assignee: The BOC Group, Inc.
    Inventors: Ravi Kumar, Madhusudhan Huggahalli, Martin Bülow
  • Patent number: 6409800
    Abstract: Nitrogen oxides and low molecular weight hydrocarbons are removed from air by subjecting the air to a temperature swing adsorption process using as the adsorbent a composite zeolite product containing both zeolite A and zeolite X. The composite zeolite product is preferably prepared by forming a mixture of an agglomerate of silica and sodium zeolite X having a Si/Al atomic ratio in the range of about 0.9 to less than about 1.2 and a water-soluble sodium aluminate salt; maintaining the mixture at a temperature in the range of about 25 to about 100° C. for a period of time sufficient to convert at least 50% of the silica to sodium zeolite A; and at least partially exchanging the zeolite A-containing product with divalent cations, preferably calcium ions.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: June 25, 2002
    Assignee: The BOC Group, Inc.
    Inventors: Adeola F. Ojo, Frank R. Fitch, Martin Bülow
  • Patent number: 6402814
    Abstract: The regeneration phase of the adsorption cycle includes a depressurization step, a heating/elution step, during which the bed is purged with a hot heating/elution gas, and a cooling/elution step, during which the bed is purged with a cold cooling/elution gas. The cooling/elution step is terminated while the cooling/elution gas leaving the bed is at a temperature markedly higher than the temperature of the gas to be treated and the adsorption phase comprises an initial adsorption step during which the bed is cooled down to the low adsorption temperature due to the effect of the gas to be treated.
    Type: Grant
    Filed: October 5, 2000
    Date of Patent: June 11, 2002
    Assignee: L'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Georges Kraus, Patrick Le Bot, Lian-Ming Sun
  • Patent number: 6402809
    Abstract: A process and a system for purifying gas, such as air, before cryogenic distillation, in which at least one energy parameter, chosen from the flow rate of the regeneration gas entering and/or leaving at least one adsorber, the duration of the regeneration step and the regeneration temperature of the regeneration gas entering at least one adsorber, is controlled, modified and/or regulated depending on at least one operating condition chosen from the pressure of the gas to be purified entering and/or leaving at least one adsorber, the flow rate of the gas to be purified entering and/or leaving at least one adsorber, the temperature (Ta) of the gas to be purified entering at least one adsorber and the content of impurities contained in the gas to be purified entering at least one adsorber and depending on the thermal profile of the heat front output by at least one adsorber at the end of regeneration.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: June 11, 2002
    Assignee: L'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Christian Monereau, Didier Miniscloux, Alain Combier
  • Patent number: 6391092
    Abstract: The present invention provides for a process for purifying atmospheric air prior to its separation by cryogenic distillation. The process utilizes three adsorbent layers, the first primarily removes water; the second primarily removes CO2; and the third layer is designed to remove displaced gas components such as N2O and hydrocarbons which are displaced by the second layer. It has been found that CaX type adsorbents provide the removal of N2O and hydrocarbons in the third layer.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: May 21, 2002
    Assignee: The BOC Group, Inc.
    Inventors: Dongmin Shen, Madhusudhan Huggahalli, Martin Bülow, Sudhakar R. Jale, Ravi Kumar
  • Patent number: RE39122
    Abstract: A system for drying a gas, such as air, includes a source of gas to be dried, a multistage compressor having an inlet connected to the source, and a dryer connected interstage to the compressor and to the outlet of the compressor. The dryer is connected interstage to the compressor between a compression stage and a heat exchanger of one of the compressor stages for regenerating a first desiccant filled tower. The dryer is also connected to the outlet of the compressor for drying the gas using a second desiccant filled tower. A communication structure can be activated to connect the first tower to the outlet of the compressor for drying the gas using the first tower, and to connect the second tower interstage to the compressor for regeneration of the second tower.
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: June 13, 2006
    Assignee: Henderson Engineering Co., Inc.
    Inventors: Charles A. Henderson, Terry D. Henderson