Ammonia Synthesizer Patents (Class 422/148)
  • Patent number: 10960374
    Abstract: Axial reactor for exothermic or endothermic chemical reactions, comprising at least a first catalytic bed and a second catalytic bed operating in series and at least one heat exchanger between the two catalytic beds, wherein the first catalytic bed has a collector bottom having a box-like structure with flat and parallel walls, which are gas-permeable, and a plurality of parallel channels defined between the walls, wherein a first series of said channels collects the gaseous flow exiting the catalytic bed and passing through the first wall, said gaseous flow is directed towards the heat exchanger, and the flow exiting the exchanger is directed towards the second catalytic bed via a second series of said channels of the collector bottom.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: March 30, 2021
    Assignee: CASALE SA
    Inventor: Enrico Rizzi
  • Patent number: 10954124
    Abstract: A process for producing ammonia make-up synthesis gas and a procedure for revamping a front-end of an ammonia plant for producing ammonia make-up synthesis gas are disclosed, wherein the make-up synthesis gas is produced by means of steam reforming of a hydrocarbon gaseous feedstock; said front-end includes a primary reformer, a secondary reformer, a shift conversion section, a CO2 removal section and optionally a methanation section; a shell-and-tube gas-heated reformer is installed after said secondary reformer, and a portion of the available feedstock is reformed in the tubes of said gas-heated reformer, and heat is provided to the shell side of said gas-heated reformer by at least a portion of product gas leaving the secondary reformer, possibly mixed with product gas leaving the tubes of said gas-heated reformer.
    Type: Grant
    Filed: October 13, 2014
    Date of Patent: March 23, 2021
    Assignee: Casale SA
    Inventors: Ermanno Filippi, Raffaele Ostuni
  • Patent number: 10889762
    Abstract: The present technology is directed to processes for conversion of synthesis gas in a tubular reactor to produce a synthetic product that utilizes high activity carbon monoxide hydrogenation catalysts and a heat transfer structure that surprisingly provides for higher per pass conversion with high selectivity for the desired synthetic product without thermal runaway.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: January 12, 2021
    Assignee: VELOCYS TECHNOLOGIES LIMITED
    Inventors: Andre Steynberg, Bin Yang, Ravi Arora, Laura Silva, Heinz Robota, Sean Fitzgerald, Paul Neagle, Jason Robinson, Paul Schubert, Steven Perry
  • Patent number: 10787367
    Abstract: The present invention is directed to the removal of ammonia from an ammonia reactor product stream. Systems and methods of the present invention enable ammonia to be synthesized and removed using a broader range of process conditions than are possible with current industrial practices. In particular, the systems and methods enable the use of higher temperatures, lower pressures, and higher reactant flows.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: September 29, 2020
    Assignee: Starfire Energy
    Inventors: Joseph D. Beach, Jonathan D. Kintner, Adam W. Welch
  • Patent number: 10677129
    Abstract: A tank system for a reducing agent includes: a vessel storing the reducing agent and having: an upper vessel wall, lateral vessel walls, a lower vessel wall forming a vessel base, a base region of the vessel having an opening, and an outer side of the vessel; and a conveying device on the outer side of the vessel that provides the reducing agent under pressure via an outlet to an exhaust gas. The conveying device with the outer side of the vessel forms a space S outside the vessel, the space S, via the opening, is connected to an interior of the vessel allowing reducing agent to flow from the interior into the space S and, by the conveying device, is suppliable from the space S to the exhaust gas and suctionable from the space S. A support is provided on the opening.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: June 9, 2020
    Assignee: Continental Automotive GmbH
    Inventor: Rolf Brück
  • Patent number: 10634033
    Abstract: A tank system for a reducing agent includes: a vessel configured to store the reducing agent, the vessel having: an upper vessel wall, lateral vessel walls, and a lower vessel wall configured to form a base of the vessel; and a heating device disposed in the vessel. At least parts of the heating device are disposed in a part of the base of the lower vessel wall of the vessel.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: April 28, 2020
    Assignee: Continental Automotive GmbH
    Inventor: Rolf Brück
  • Patent number: 10618817
    Abstract: A method and device for producing ammonia from a syngas in a heterogeneous gas catalysis process in at least two reaction devices connected in series. Each reaction device includes at least two catalyst beds through which the syngas is conducted and in which an at least partial conversion of the syngas into the product gas is carried out. At least one first heat exchanger is provided in the first reaction device, and the fresh syngas is pre-heated in the first heat exchanger. The syngas exiting the first catalyst bed and which includes the product and non-converted reactants is cooled before entering the second catalyst bed. According to an embodiment of the invention, the pre-heating process is carried out in a first heat exchanger arranged between the first and the second catalyst bed. Thus, synthesis conversion can be increased without substantially increasing the process gas quantity.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: April 14, 2020
    Assignees: THYSSENKRUPP INDUSTRIAL SOLUTIONS AG, THYSSENKRUPP AG
    Inventors: Christoph Meissner, Andreas Kinner, Klaus Nölker, Reinhard Heun
  • Patent number: 10549500
    Abstract: An adhesive tape includes a carrier having a stitch bonded nonwoven and an adhesive layer that is applied to one side of the carrier, wherein the stitch bonded nonwoven is formed from fibers, which are stitched with sewing threads. The adhesive tape has improved abrasion resistance while simultaneously avoiding flagging. The sewing threads may have a thread linear density of at least 80 dtex.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: February 4, 2020
    Assignee: Coroplast Fritz Müller GmbH & Co. KG
    Inventors: Gülay Wittig, Guido Vorwerk, Christoph Lodde
  • Patent number: 10500556
    Abstract: Horizontal adiabatic reactor (1) for heterogeneous catalytic reactions, comprising an outer cylindrical shell (2), an inlet (6) for reagent gases and an outlet (7) for gaseous products, a basket (10, 13) containing a catalytic bed (5a, 5b) positioned horizontally inside said reactor, wherein said reactor is configured in such a way that the gases cross said catalytic bed in a radial or axial-radial manner, said shell (2) has a cover (4) which can be opened and which defines an opening (20), and said basket (10, 13) is extractable horizontally from said opening.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: December 10, 2019
    Assignee: Casale SA
    Inventor: Mirco Tarozzo
  • Patent number: 10478798
    Abstract: A process layout for large scale methanol synthesis comprises one or more boiling water reactors and one or more radial flow reactors in series, the boiling water reactor(s) being fed with approximately fresh make-up syngas. The methanol synthesis loop comprises a make-up gas compressor K1, a recycle gas compressor K2, two or more boiling water converters for methanol synthesis (A1, A2, . . . ), a radial flow converter (B) for methanol synthesis, a steam drum (V1), a high pressure separator (V2), a low pressure separator (V3), feed effluent heat exchangers (E1 and E2), a wash column (C), an air cooler (E3) and a water cooler (E4).
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: November 19, 2019
    Assignee: Haldor Topsoe A/S
    Inventor: Hassan Modarresi
  • Patent number: 10472236
    Abstract: The inventions is directed to a new design for catalyst tubes, which makes it possible to apply the concept of regenerative reforming into steam reformers having catalyst tube inlets and outlets at opposite sides of the furnace chamber. The catalyst tube comprises an inlet for process gas to enter the catalyst tube and an outlet for process gas to exit the catalyst tube, which inlet and outlet are located at opposite ends of the catalyst tube. The catalyst tube further comprises a first annular channel comprising the catalyst, a second annular channel for process gas to flow countercurrently or co-currently to the process gas flowing through the first annular channel.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: November 12, 2019
    Assignee: TECHNIP FRANCE
    Inventors: Antonio Farace, Stephane Walspurger
  • Patent number: 10336623
    Abstract: Method for revamping a multi-bed ammonia converter, wherein said converter comprises a plurality of adiabatic catalytic beds including a first catalytic bed and one or more further catalytic bed(s), said catalytic beds being arranged in series so that the effluent of a bed is further reacted in the subsequent bed; at least a first inter-bed heat exchanger arranged between said first catalytic bed and a second catalytic bed to cool the effluent of said first bed before admission into said second bed, and optionally further inter-bed heat exchanger(s) arranged between consecutive beds; said method involves the conversion of said first catalytic bed into an isothermal catalytic bed.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: July 2, 2019
    Assignee: Casale SA
    Inventor: Davide Carrara
  • Patent number: 10040692
    Abstract: Systems and methods for producing ammonia. The system can include a first ammonia converter, a second ammonia converter, a product separator, and an ammonia recovery unit. The first ammonia converter can be adapted to react a syngas to produce a first ammonia product and a first purge gas. The second ammonia converter can be in fluid communication with the first ammonia converter and can be adapted to react the first purge gas to produce an effluent. The product separator can be in fluid communication with the second ammonia converter and can be adapted to separate the effluent to produce a second ammonia product and a second purge gas. The ammonia recovery unit can be in fluid communication with the product separator and can be adapted to separate at least a portion of the second purge gas to produce a third ammonia product and a third purge gas.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: August 7, 2018
    Assignee: Kellogg Brown & Root LLC
    Inventors: Trevor Williams Nurse, Girishkumar Natvarbhai Patel
  • Patent number: 9884304
    Abstract: An immersion fixed bed reactor intensified by liquid flow contains a cylindrical tank internally installed with an annular cylindrical catalyst bed (ACCB) packed with solid catalysts is provided. The inner and outer walls of the ACCB are composed of two layers of stainless steel sheets with holes. The outer layer of stainless steel perforated with holes. The inner layer of catalyst contacting stainless steel is covered with stainless steel waved mesh in circumferential direction. The bottom of AACB is sealed with a steel plate by welding or a blind plate and the top of ACCB is fixed to cylindrical tank with a flange. The solid catalysts are packed in the ACCB.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: February 6, 2018
    Assignee: NANJING UNIVERSITY
    Inventors: Zheng Zhou, Zhibing Zhang, Gaodong Yang, Yue Dai, Pingkeng Wu, Xiaojuan Liu
  • Patent number: 9751773
    Abstract: In one embodiment, an ammonia synthesis system comprising, an ammonia synthesis reactor, a waste heat boiler, a supply water heat exchanger, a recycle gas heat exchanger, a water cooler, an ammonia chiller and refrigeration exchanger, a secondary ammonia chiller, an ammonia separator, a liquid ammonia tank, a recycle compressor and a start-up heater, and wherein, a process gas is heated in the recycle gas heat exchanger and enters the ammonia synthesis reactor and the waste heat boiler, a reacted gas stream exits from a bottom of the waste heat boiler and is cooled in the supply water heat exchanger, a gas stream enters the recycle gas heat exchanger, the water cooler, the ammonia chiller and refrigeration exchanger, the secondary ammonia chiller, and is cooled, the gas stream enters the ammonia separator to form a separate liquid ammonia and the separated liquid ammonia enters the liquid ammonia tank.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: September 5, 2017
    Assignee: Hunan Anchun Advanced Technology Co., Ltd.
    Inventor: Dingzhong Xie
  • Patent number: 9650269
    Abstract: A method and a system (12) for reducing plant (10) gas emissions by reducing ammonia/ammonium ion content in waste water W prior to the waste water W being evaporated in an evaporator device (7). As such, the method and the system (12) reduce the release of ammonia/ammonium ion into the flue gas FG stream thus reducing emissions of ammonia/ammonium ions to the environment or atmosphere and/or accumulation of ammonia/ammonium ions in downstream equipment such as a wet flue gas desulfurization system (13).
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: May 16, 2017
    Assignee: General Electric Technology GmbH
    Inventors: Raymond Raulfs Gansley, Philip C. Rader
  • Patent number: 9644902
    Abstract: Shell and tube heat exchangers that include a baffle arrangement that improves the temperature profile and flow pattern throughout the exchanger and/or that are integral with a reaction vessel are disclosed. Methods for using the exchangers including methods that involve use of the exchanger and a reaction vessel to produce a reaction product gas containing trichlorosilane are also disclosed.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: May 9, 2017
    Assignee: MEMC Electronic Materials, S.p.A.
    Inventors: Gianluca Pazzaglia, Matteo Fumagalli, Rodolfo Bovo
  • Patent number: 9617483
    Abstract: A quenching medium is delivered directly to selected regions or locations within a catalyst bed in a hydroprocessing reactor vessel in order to control the reactivity of a hydroprocess occurring in the selected regions or locations separately from other regions or locations. Temperature sensors for providing temperature indications and conduits for delivering the quench medium are distributed throughout the catalyst bed. One or more conduits can be selected for delivery of the quenching medium to selected regions or locations so that separate control of the level of reactivity in each of various regions or locations throughout the bed can be achieved.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: April 11, 2017
    Inventor: Jeffrey N. Daily
  • Patent number: 9611191
    Abstract: A reactor for gas-phase dehydrogenation of a hydrocarbon-comprising stream with an oxygen-comprising stream over a monolithic heterogeneous catalyst. Catalytically active zone(s) comprising monoliths packed next to one another and/or above one another and a mixing zone having fixed internals upstream of each catalytically active zone. Feed line(s) for the hydrocarbon-comprising gas stream to be dehydrogenated at the lower end of the reactor. Independently regulable feed line(s), which supply distributor(s), for the oxygen-comprising gas stream into each of the mixing zones and discharge line(s) for the reaction gas mixture of the autothermal gas-phase dehydrogenation at the upper end of the reactor. The interior wall of the reactor is provided with insulation. The catalytically active zone(s) is accessible from the outside of the reactor via manhole(s).
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: April 4, 2017
    Assignee: BASF SE
    Inventors: Gerhard Olbert, Carlos Tellaeche Herranz, Norbert Asprion, Alexander Weck, Ellen Dahlhoff
  • Patent number: 9561484
    Abstract: A method for revamping a secondary reformer (1), the reformer comprising an internal gas riser pipe (8) for routing a process gas from a bottom gas inlet to a combustion chamber (5) located above a catalytic zone (6), and a distributor (9) for introduction of an oxidation agent such as process air into the combustion chamber. The original distributor of the oxidation agent is discontinued, the gas riser pipe is shortened (8?) and the outlet end of the shortened gas riser pipe is arranged to deliver a gas flow directed upwards. A new burner (20) is installed on top of the reformer, the new burner being arranged to deliver an oxidation agent such as process air with a downward flow, thus obtaining a counterflow mixing zone (23) and formation of a diffusion flame above the outlet end of the gas riser pipe.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: February 7, 2017
    Assignee: Casale SA
    Inventors: Luca Zanichelli, Andrea Beretti
  • Patent number: 9376326
    Abstract: Method for modifying a hot wall ammonia reactor con vessel (2) having partial opening, comprising: assembly directly inside the vessel (2) of a catalytic cartridge (7) with modular elements, said modular elements being of a size compatible with introduction into the vessel through a pre-existing partial opening (6) of the vessel, and each comprising at least one panel (11); the panels (11) of said modular elements forming a substantially cylindrical outer wall (7a) of said cartridge (7), and an annular flux space (8) between said outer wall of the cartridge and an inner wall of the vessel; said panels (11) being provided with a respective heat insulation layer (13) before introduction into the vessel (2).
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: June 28, 2016
    Assignee: Casale SA
    Inventors: Marco Badano, Mirco Tarozzo, Federico Maffietti
  • Patent number: 9272906
    Abstract: Method for purification of ammonia or mixtures of nitrogen and hydrogen, or nitrogen, hydrogen and ammonia, where ammonia or a mixture of gases under pressure of from 0.1 to 25 MPa is passed through a column packed with aluminum oxide with a large specific surface area, the ammonia or mixture of gases is then passed through a column packed with CaO, NaOH, KOH or an NaOH/KOH melt, separately or in a mixture, at 20 to 70° C. and under pressure of from 0.1 to 25 MPa, and the ammonia or mixture of gases is passed through a column packed with activated carbon having a specific area of 100-3000 m2/g with sodium, potassium, caesium, magnesium, calcium, strontium, barium or cerium nitrates(V) or nitrates(III) deposited on its surface, separately or in a mixture.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: March 1, 2016
    Assignee: POLITECHNIKA WARSZAWSKA
    Inventors: Wioletta Rarog-Pilecka, Slawomir Podsiadlo, Dariusz Lenkiewicz, Slawomir Andrzej Maculewicz
  • Patent number: 9243190
    Abstract: An apparatus and a method for producing chemicals from a methane-containing gas are provided. More specifically, the method and an apparatus make use of heterogeneous catalysis, beginning with the partial oxidation of methane to produce synthesis gas followed by a reaction, such as a Fischer-Tropsch reaction, to produce the chemicals.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: January 26, 2016
    Assignee: ME RESOURCE CORP
    Inventors: Gregory Patience, Daria Camilla Boffito
  • Patent number: 9108858
    Abstract: A Haber-Bosch process including the steps of providing a reactor having a substrate with catalyst filaments formed thereon. The catalyst filaments are formed of a metal including iron. A nitrogen compound and hydrogen are injected into the reactor such that at least a portion of the nitrogen compound and hydrogen contact the catalyst filaments. The nitrogen compound and hydrogen are reacted with the catalyst filaments at a temperature of less than about 600° F. and a pressure of less than about 2000 psig.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: August 18, 2015
    Assignee: Louisiana Tech University Research Foundation; a Division of Louisiana Tech University Foundation
    Inventors: John McDonald, Chester Wilson, Joshua Brown
  • Publication number: 20150129806
    Abstract: A process for producing ammonia make-up synthesis gas and a procedure for revamping a front-end of an ammonia plant for producing ammonia make-up synthesis gas are disclosed, wherein the make-up synthesis gas is produced by means of steam reforming of a hydrocarbon gaseous feedstock; said front-end includes a primary reformer, a secondary reformer, a shift conversion section, a CO2 removal section and optionally a methanation section; a shell-and-tube gas-heated reformer is installed after said secondary reformer, and a portion of the available feedstock is reformed in the tubes of said gas-heated reformer, and heat is provided to the shell side of said gas-heated reformer by at least a portion of product gas leaving the secondary reformer, possibly mixed with product gas leaving the tubes of said gas-heated reformer.
    Type: Application
    Filed: November 8, 2013
    Publication date: May 14, 2015
    Applicant: Ammonia Casale SA
    Inventors: Ermanno Filippi, Raffaele Ostuni
  • Publication number: 20150125377
    Abstract: A system for producing ammonia comprises a reactor configured for receiving nitrogen feed gas and hydrogen feed gas, the reactor comprising a catalyst configured to convert at least a portion of the nitrogen gas and at least a portion of the hydrogen feed gas to ammonia to form a reactant mixture comprising the ammonia and unreacted nitrogen feed gas and unreacted hydrogen feed gas, an adsorbent configured to selective adsorb at least a portion of the ammonia from the reactant mixture, and a recycle line to recycle the unreacted nitrogen feed gas, the unreacted hydrogen feed gas, and unabsorbed ammonia to the reactor.
    Type: Application
    Filed: November 7, 2014
    Publication date: May 7, 2015
    Inventors: Heath H. Himstedt, Mark S. Huberty, Alon V. McCormick, Lanny D. Schmidt, Edward L. Cussler
  • Publication number: 20150098869
    Abstract: A procedure for producing unstable aldehydes from coal combustion emission by inserting protons (H+) within the double bond interstice structure of heated CO2 carrier gas to form a univalent aldehyde (CO2H+). The univalent aldehydes are actinically radiated by a massless negative charge that is ejected from a filament rail magnetic induction circuit at 1 sec. intervals during periods of high emf shock loading. The negative charge actinic radiation passes through a ceramic cylinder wall of an alignment chamber and is attracted to the electrophilic proton (H+) enmeshed in the CO2 double bond interstice structure weakening the structure. The weakened structure allows the enmeshed proton (H+) to be subsequently removed in a proceeding process in an anodal stabilization chamber for the production of carbon chains.
    Type: Application
    Filed: October 7, 2013
    Publication date: April 9, 2015
    Inventor: Edward Milton McWhorter
  • Patent number: 8992842
    Abstract: A system for producing ammonia includes sources of hydrogen and nitrogen gas, a hydrogen gas booster for producing produce pressurized hydrogen gas, a nitrogen gas booster for producing pressurized nitrogen gas, and a synthesis reactor that receives a mixture of the pressurized hydrogen and nitrogen gases. The synthesis reactor includes an inlet for receiving the pressurized gas mixture, a heating zone adjacent the inlet for heating the gas mixture, a catalyst zone downstream from the heating zone for catalyzing a reaction of the mixture to form ammonia and a by-product, and a cooling zone downstream from the catalyst zone for cooling the ammonia and the by-product. The system has a separator for separating the ammonia from the by-product, an ammonia storage tank for collecting the ammonia, and a recycle loop for re-circulating the by-product back to the synthesis reactor.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: March 31, 2015
    Inventor: Roger Gordon
  • Patent number: 8980181
    Abstract: An ammonia generating and delivery apparatus generating ammonia by heating a precursor material with a heating device controlled by a temperature pulse controller which receives commands from a pressure controller, and delivering ammonia with a flow rate controlled by a three-stage PWM controller. The temperature pulse controller is used in a first feedback loop to create a temperature pulse sequence at a surface of the heating device. A pressure controller in a second feedback loop provides duty-cycle commands to the temperature pulse controller, while in delivering ammonia, effects of pressure variation to delivery accuracy are compensated in the three-stage PWM controller, which includes a flow-rate feedback loop. The ammonia generating and delivery apparatus can also include two containers, in which the precursor material in one container is charged and discharged according to the capability of the other container in generating ammonia.
    Type: Grant
    Filed: March 8, 2014
    Date of Patent: March 17, 2015
    Inventor: Baohua Qi
  • Patent number: 8968515
    Abstract: A method of alkaline pretreatment of biomass, in particular, pretreating biomass with gaseous ammonia.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: March 3, 2015
    Assignee: Board of Trustees of Michigan State University
    Inventors: Venkatesh Balan, Bruce E. Dale, Shishir Chundawat, Leonardo Sousa
  • Patent number: 8969422
    Abstract: A gasification-liquefaction disposal method, system and equipment for MSW are disclosed. The method involves the MSW pretreatment of dehydrating and separating, thus reducing water and inorganic substance content of the waste. Then, the MSW is introduced into a plasma gasifier (23) by a carbon dioxide air-sealed feeding device (13) and gasified therein to obtain hydrogen-rich syngas. The hydrogen-rich syngas is then cooled, deacidified, dedusted and separated to obtain carbon dioxide. Then, the hydrogen-rich syngas is catalyzed to produce methanol product in a methanol synthesis reactor (52). The separated carbon dioxide is sent back to a carbonation reaction chamber (2007) of a gasification system to perform carbonation reaction with calcium oxide, thereby releasing heat to provide assistant heat energy for gasification and avoiding greenhouse gas from being discharged into environment.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: March 3, 2015
    Assignee: Quzhou City Guangyuan Domestic Garbage Liquefy Technology Institute
    Inventor: Kaigen Zhou
  • Publication number: 20150044121
    Abstract: Methods and systems for making ammonia are provided. The method can include heating a first compressed syngas to produce a heated first syngas. The heated first syngas and a second compressed syngas can be combined to produce a combined syngas. The combined syngas can be reacted within a first ammonia converter and a second ammonia converter to produce an ammonia product. Heat from the ammonia product can be transferred to a first heat transfer medium to produce a first cooled product and a second heat transfer medium. Heat from the first cooled product can be transferred to a third heat transfer medium to produce a second cooled product. Heat from the second cooled product can be transferred to the combined syngas to produce a third cooled product. The third cooled product can be separated to produce a purified ammonia product and a recycle gas.
    Type: Application
    Filed: August 5, 2014
    Publication date: February 12, 2015
    Inventors: SHASHI PRAKASH SINGH, Akhil Jain Nahar, Stephen Allen Noe
  • Publication number: 20150044120
    Abstract: Methods and systems for making ammonia are provided. The method can include converting carbon monoxide in a first syngas to carbon dioxide to produce a shifted syngas. At least a portion of the carbon dioxide can be separated from the shifted syngas to produce a carbon dioxide-lean syngas. Carbon monoxide and/or carbon dioxide in the carbon dioxide-lean syngas can be converted to methane to produce a methanated first syngas. A second syngas can be separated to produce a purified second syngas and a waste gas. The methanated first syngas and the purified second syngas can be combined to produce an ammonia feedstock. The ammonia feedstock can have a hydrogen to nitrogen molar ratio of about 3.5:1 to about 2.5:1. At least a portion of the hydrogen and nitrogen in the ammonia feedstock can be reacted to produce an ammonia product.
    Type: Application
    Filed: August 5, 2014
    Publication date: February 12, 2015
    Inventors: SHASHI PRAKASH SINGH, AKHIL JAIN NAHAR, STEPHEN ALLEN NOE
  • Patent number: 8940543
    Abstract: Disclosed are methods and apparatus for treating and analyzing a gas stream to determine the effectiveness of urea gasification. The apparatus will be capable of performing the method and will include: means for introducing an aqueous solution of urea into a reactor having hot gases therein and subjecting the aqueous to temperatures for a time to assure the gasification of the aqueous urea and form a thermal gasification product stream containing NH3 and HNCO; means for taking a sample stream from the gasification product stream; means for contacting the sample stream with a hydrolysis catalyst in the presence of sufficient water to convert HNCO to NH3 and form an ammonia sample stream; and means for analyzing the ammonia sample stream for NH3. The methods and apparatus can also be used to control a urea gasification process and/or to signal anomalous operation.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: January 27, 2015
    Assignee: Fuel Tech, Inc.
    Inventors: William H. Sun, John M. Boyle
  • Publication number: 20150014596
    Abstract: A process for producing ammonia synthesis gas from a hydrocarbon source, comprising: conversion of the hydrocarbon source into a raw synthesis gas (14) in ATR or POX reactor (11) which is fired with oxygen (12) or oxygen-enriched air (28); a water-gas shift treatment of the raw synthesis gas (14), which consist of a medium-temperature shift (15) at a temperature of 200-300° C., thus obtaining a shifted synthesis gas (16); purification of said shifted synthesis gas (16) including at least a step of pressure-swing adsorption (17) to remove residual carbon oxides and methane from the synthesis gas, obtaining a purified synthesis gas (18), and optionally, addition of nitrogen (19) to said purified synthesis gas (18), thus obtaining ammonia synthesis gas with a desired hydrogen to nitrogen ratio.
    Type: Application
    Filed: January 15, 2013
    Publication date: January 15, 2015
    Applicant: Casale SA
    Inventors: Ermanno Filippi, Raffaele Ostuni
  • Patent number: 8926909
    Abstract: A method for modernizing an ammonia synthesis loop (1) with a first converter (10) and a second converter (11) in series, the first converter (10) comprises a cartridge with one or more catalyst beds, the second converter (11) comprises a catalyst bed in direct contact with said vessel, the method comprising the steps of removing the second converter, and boosting the first converter by replacing the cartridge with a high-efficiency cartridge comprising a plurality of adiabatic catalyst beds and inter-bed heat exchangers, or an isothermal catalyst bed, and by reducing the concentration of inerts in said first converter.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: January 6, 2015
    Assignee: Casale SA
    Inventors: Ermanno Filippi, Luca Bianchi
  • Publication number: 20140363344
    Abstract: An ammonia capture recovery system is disclosed. The ammonia capture recovery system may include pretreatment with conventional solid removal devices and a single or a series of hydrophobic membrane concentrators receiving a heated ammonium containing influent either heated to a sufficient temperature to convert ammonia to ammonium or containing sufficient alkali to convert ammonia to ammonium in the influent. The heated ammonium containing liquid is pumped through the hydrophobic membrane concentrator and the hydrophobic membrane concentrator receives an acid. The acid then reacts with the extracted gaseous ammonia and ultimately forms a saturated ammonium salt product that is discharged from the hydrophobic membrane concentrator, the hydrophobic membrane concentrator includes a feed line, a plurality of hydrophobic membrane modules, a diluted acid source and a concentrated acid source and tanks to receive the saturated ammonium salt product and the low ammonia effluent.
    Type: Application
    Filed: June 9, 2014
    Publication date: December 11, 2014
    Inventors: Morton Orentlicher, Mark Simon
  • Publication number: 20140314657
    Abstract: Methods, systems, and apparatuses for anaerobic digestion of waste fibrous material and the recovery of nutrients are provided. Methods, systems, and apparatuses disclosed herein provide mechanisms to release dissolved gases from anaerobic digester effluent. Methods, systems and apparatuses disclosed herein can recover one or more nutrients from anaerobic digested effluent using a range of temperatures, aeration rates, aeration times, pH ranges, and settling times.
    Type: Application
    Filed: December 18, 2013
    Publication date: October 23, 2014
    Inventors: Quanbao Zhao, Stephen W. Dvorak, Shulin Chen, Craig Frear, Bryan J. VanLoo
  • Publication number: 20140275629
    Abstract: A reaction chamber includes: a catalyst that, in use, is wired to a power source in electrical short circuit configuration with a current limiting circuit in the power supply; and a reaction volume in which the catalyst is disposed and wherein reactants are introduced while a current is introduced across the short circuited catalyst. The reaction chamber may also be a part of system that includes the reactant feedstocks and a power supply. In operation, a plurality of reactant feedstocks are provided to a reaction volume within the reactor. The catalyst electrically activated through the short circuit to reacting the reactant feedstocks in the presence of the electrically activated catalyst. The yield product of the reactions is then collected.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 18, 2014
    Inventors: Ed Ite Chen, Tara Cronin
  • Publication number: 20140255289
    Abstract: The present invention is a combustion system employing a urea-to-ammonia vapor reactor system. The urea-to-ammonia reactor housing enclosed in a bypass flow duct that receives a secondary flue gas stream at a split point from a main flue gas stream containing nitrogen oxides (NOx) emanating from a boiler. The bypass flow duct allows the secondary flue gas stream to flow past the enclosed reactor housing where injected aqueous urea in atomized or non-atomized form, is gasified to ammonia vapor. The resulting gaseous mixtures of ammonia, its by-products and the secondary flue gas stream subsequently rejoin the main stream, before the main flue gases are treated through a Selective Catalytic Reduction (SCR) reactor apparatus. A residence time of the secondary stream within the bypass flow duct, which may be increased by a recirculation loop, enables effective conversion of urea to ammonia to be used in the SCR apparatus.
    Type: Application
    Filed: November 5, 2010
    Publication date: September 11, 2014
    Applicant: JOHNSON MATTHEY INC.
    Inventor: Yul Kwan
  • Publication number: 20140248205
    Abstract: In various implementations, feed streams that include ultrapure, high-pressure hydrogen streams and ultrapure, high-pressure nitrogen streams are reacted to produce ultrapure, high-pressure feed gas in a stoichiometric ratio to an ammonia synthesis reactor loop without or independent of including a methanol loop purge gas.
    Type: Application
    Filed: February 11, 2014
    Publication date: September 4, 2014
    Applicant: GTLPETROL LLC
    Inventor: Rodney J. Allam
  • Patent number: 8778293
    Abstract: A process for producing ammonia from air and water comprises producing nitrogen gas from air by pressure-swing-adsorption; producing hydrogen gas by electrolysis of water; compressing the nitrogen gas in a first cylinder to produce pressurized nitrogen gas; compressing the hydrogen gas in a second cylinder to produce pressurized hydrogen gas; compressing a mixture of the pressurized nitrogen and hydrogen gases in a third cylinder; heating the compressed mixture in the presence of a catalyst to react nitrogen and hydrogen to form ammonia; and extracting the ammonia from the mixture. A system for producing ammonia in the above process is also provided.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: July 15, 2014
    Inventor: Roger Gordon
  • Publication number: 20140150410
    Abstract: The present invention relates to an ammonia gas generator for generating ammonia from an ammonia precursor substance and to the use thereof for reducing nitrogen oxides in exhaust, in particular from industrial facilities, from combustion engines, from gas engines, from diesel engines or from petrol engines.
    Type: Application
    Filed: June 29, 2012
    Publication date: June 5, 2014
    Applicant: ALZCHEM AG
    Inventors: Christian Gerhart, Thomas Sattelmayer, Plamen Toshev
  • Publication number: 20140147356
    Abstract: The invention relates to an ammonia gas generator for producing ammonia from an ammonia precursor substance as well as the use thereof in exhaust aftertreatment systems. The invention further relates to a method for producing ammonia gas to reduce nitrogen oxides in exhaust gases, in particular combustion gases from internal combustion engines such as diesel engines.
    Type: Application
    Filed: June 29, 2012
    Publication date: May 29, 2014
    Applicant: ALZCHEM AG
    Inventors: Christian Gerhart, Thomas Sattelmayer, Plamen Toshev
  • Publication number: 20140134057
    Abstract: Systems and methods of producing chemical compounds are disclosed. An example chemical production system includes an intake chamber having intake ports for entry of a gas mixture. An igniter ignites the gas mixture in the intake chamber. A nozzle restricts exit of the ignited gas mixture from the intake chamber. An expansion chamber cools the ignited gas with a cooling agent. The expansion chamber has an exhaust where the cooled gas exits the expansion chamber. A chemical compound product is formed in the expansion chamber.
    Type: Application
    Filed: January 17, 2014
    Publication date: May 15, 2014
    Inventor: Bruce H. Peters
  • Patent number: 8721975
    Abstract: Plant for urea production from ammonia and carbon dioxide having a so-called high-pressure section which comprises a synthesis reactor and a condensation unit (7, 107) positioned inside the reactor, all substantially operating at the same pressure.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: May 13, 2014
    Assignee: Urea Casale SA
    Inventors: Ermanno Filippi, Enrico Rizzi, Mirco Tarozzo, Federico Zardi
  • Publication number: 20140072499
    Abstract: Systems and methods are disclosed herein for synthesizing ammonia using nano-size metal or metal alloy catalyst particles. Hydrogen and nitrogen gases are passed through a system comprising, for example, a bed of magnetite supporting nano-size iron or iron alloy catalyst particles having an optional oxide layer that forms the catalyst.
    Type: Application
    Filed: November 20, 2013
    Publication date: March 13, 2014
    Applicant: QuantumSphere, Inc.
    Inventors: R. Douglas Carpenter, Kevin Maloney
  • Publication number: 20140018575
    Abstract: A process for ammonia -urea production where: liquid ammonia produced in an ammonia section is fed to a urea section directly at the ammonia synthesis pressure, and where the liquid ammonia is purified at high pressure with the steps of: cooling the liquid ammonia (20) obtaining a cooled liquid ammonia stream (21), separating a gaseous fraction (22) comprising hydrogen and nitrogen from said cooled liquid ammonia, obtaining purified liquid ammonia (23) at a high pressure, and reheating said purified liquid ammonia (23) after separation of said gaseous fraction, obtaining a reheated purified ammonia (24) having a temperature suitable for feeding to the urea synthesis process. The application also deals with an ammonia -urea plant comprising an ammonia cooler, a liquid-gas separator and an ammonia re-heater and with a method for revamping existing ammonia -urea plants.
    Type: Application
    Filed: February 10, 2012
    Publication date: January 16, 2014
    Applicant: Urea Casale SA
    Inventors: Ermanno Filippi, Marco Badano, Frederico Zardi, Andrea Scotto
  • Patent number: 8597583
    Abstract: An ammonia synthesis apparatus includes: a first gas channel; a second gas channel disposed outside the first gas channel; a third gas channel disposed outside the second gas channel; an air supply unit that supplies air to the second or third gas channel; a water supply unit that supplies water to the first gas channel; and a heat supply unit that supplies heat to the first gas channel. A metal or a metal oxide that reduces water to produce hydrogen is placed in the first gas channel. An ammonia synthesis catalyst is placed in the second gas channel located downstream of the downstream end portion of the first gas channel. The second and third gas channels are at least partially partitioned by an oxygen permeation membrane, or a nitrogen permeation membrane, so that oxygen is supplied to the third gas channel, and nitrogen is supplied to the second gas channel.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: December 3, 2013
    Assignees: Toyota Jidosha Kabushiki Kaisha, Hitachi Zosen Corporation
    Inventors: Haruyuki Nakanishi, Norihiko Nakamura, Hidekazu Arikawa, Susumu Hikazudani, Sadao Araki, Chikashi Inazumi
  • Patent number: 8591770
    Abstract: A process for producing a synthesis gas containing hydrogen and nitrogen, suitable for production of ammonia, wherein a raw synthesis gas (13) obtained by reforming of a natural gas feedstock is purified in a cryogenic separator (CS), and a portion of purified gas (16) is expanded and used as a cooling medium in the same separator, said expanded portion (16) being then re-introduced in the main stream of purified synthesis gas. A suitable apparatus and revamping of conventional plants according to the invention are also disclosed.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: November 26, 2013
    Assignee: Ammonia Casale SA
    Inventors: Ermanno Filippi, Geoffrey Frederick Skinner