1
Denis J Connor, David G Doman, Les Jeziorowski, Bowie G Keefer, Belinda Larisch, Christopher McLean, Ian Shaw: Rotary pressure swing adsorption apparatus. QuestAir Technologies, Klarquist Sparkman, June 18, 2002: US06406523 (119 worldwide citation)

Gas separation by pressure swing adsorption (PSA) is performed within an apparatus having a plurality of adsorbers cooperating with first and second valves in a rotary PSA module, with the PSA cycle characterized by multiple intermediate pressure levels between the higher and lower pressures of the ...


2
Bowie G Keefer: High temperature fuel cell power plant. QuestAir Technologies, Klarquist Sparkman, August 29, 2006: US07097925 (95 worldwide citation)

Disclosed is a high temperature fuel cell power generation system that includes a high temperature fuel cell having an anode inlet and exhaust, and a cathode inlet and exhaust. The system also includes a gas separation means operable to recover hydrogen gas from the anode exhaust and to provide at l ...


3
Bowie G Keefer: High frequency pressure swing adsorption. Questor, January 23, 2001: US06176897 (91 worldwide citation)

Pressure swing adsorption separation of a feed gas mixture, to obtain a purified product gas of the less strongly adsorbed fraction of the feed gas mixture, is performed in a plurality of preferably an even number of adsorbent beds, with each adsorbent bed communicating at its product end directly t ...


4
Bowie G Keefer: Extraction and concentration of a gas component. January 21, 1992: US05082473 (90 worldwide citation)

Pressure swing adsorption separation of a gas mixture, containing a first component and also a second component which may be at low or trace concentrations, is performed to extract the second component from the gas mixture so that a first product stream containing the first component may be substant ...


5
Bowie G Keefer, Christopher R McLean: High frequency rotary pressure swing adsorption apparatus. Questor, May 2, 2000: US06056804 (84 worldwide citation)

Pressure swing adsorption separation of a feed gas mixture, to obtain a purified product gas of the less strongly adsorbed fraction of the feed gas mixture, is performed with a cooperating set of "N" adsorbers in a rotary assembly, with each adsorber communicating at its product end directly to a ro ...


6
Bowie G Keefer: Thermally coupled pressure swing adsorption. October 26, 1993: US05256172 (78 worldwide citation)

Pressure swing adsorption separation of a gas mixture is performed in an apparatus with a plurality of adsorbent beds cooperating to exchange energy from an adsorbent bed undergoing a depressurization step to an adsorbent bed undergoing a pressurization step, and with provision for thermal coupling ...


7
Denis J Connor, Bowie G Keefer, Christopher R McLean, Shanna D Knights, Jean St Pierre: Methods and apparatuses for gas separation by pressure swing adsorption with partial gas product feed to fuel cell power source. QuestAir Technologies, Klarquist Sparkman, March 15, 2005: US06866950 (77 worldwide citation)

Various systems, method and apparatuses are disclosed that include a pressure swing adsorption apparatus coupled to a fuel cell, wherein the fuel cell receives at least a portion of a product gas from the pressure swing adsorption and powers the pressure swing adsorption apparatus. Also disclosed is ...


8
Bowie G Keefer: Gas phase chemical reactor. March 28, 1989: US04816121 (70 worldwide citation)

Gas or vapor phase chemical reactions are conducted inside an open loop Stirling cycle apparatus which may operate as a heat engine or as a heat pump. Adsorbent surfaces are associated with the thermal regenerators of the Stirling cycle apparatus, so that pressure swing adsorption separation of reac ...


9
Bowie G Keefer, Christopher McLean: Life support oxygen concentrator. QuestAir Technologies, Klarquist Sparkman, February 4, 2003: US06514319 (69 worldwide citation)

Gas separation by pressure swing adsorption (PSA) and vacuum pressure swing adsorption (VPSA), to obtain a purified product gas of the less strongly adsorbed fraction of the feed gas mixture, is performed with an apparatus having a plurality of adsorbers. The adsorbers cooperate with first and secon ...


10
Bowie G Keefer: Apparatus and process for pressure swing adsorption separation. January 31, 1989: US04801308 (69 worldwide citation)

Pressure swing adsorption separation of a gas mixture containing a more readily adsorbed component and a less readily adsorbed component is performed within an apparatus containing an adsorbent bed with cyclically varied geometry, such that the bed volume can be expanded or contracted. Variable volu ...