1
Robert J Sanger, Gavin P Towler, Kishore J Doshi, Kurt M Vanden Bussche, John J Senetar: Apparatus for providing a pure hydrogen stream for use with fuel cells. UOP, John G Tomei, Richard P Silverman, February 20, 2001: US06190623 (93 worldwide citation)

An apparatus is provided which comprises two burner zones using a single igniter separated by a heat transfer zone for use in low-cost hydrogen generation units. When used in conjunction with a control system which limits the effluent temperature to less than about 700° C., the apparatus can be cons ...


2
Kishore J Doshi, Kirit M Patel: Pressure swing adsorption recovery. Union Carbide Corporation, Alvin H Fritschler, July 20, 1982: US04340398 (70 worldwide citation)

Void space gas is released from an adsorbent bed at a higher adsorption pressure by cocurrent depressurization of the bed. The released gas is passed to another bed of a pressure swing adsorption system to equalize the pressure therebetween, the other bed being initially at a lower pressure. A porti ...


3
Kishore J Doshi: Enhanced gas separation process. Union Carbide Corporation, M N Reinisch, September 1, 1987: US04690695 (66 worldwide citation)

A feed gas stream is separated by the use of one or more permeable membranes for bulk separation and for residual product gas recovery, in combination with a pressure swing adsorption process for the recovery of high purity product gas, e.g., hydrogen from mixtures thereof with methane. Waste gas fr ...


4
Gavin P Towler, Kishore J Doshi, Kurt M Vanden Bussche, John J Senetar: Process for providing a pure hydrogen stream for use with fuel cells. UOP, John G Tolomei, Richard P Silverman, October 9, 2001: US06299994 (57 worldwide citation)

Hydrogen generation and fuel cell operation are integrated through the use of a low-cost hydrogen generation zone which comprises a pre-reforming zone, a partial oxidation zone, a reforming zone, and a water gas shift zone. Anode waste gas from the fuel cell is burned to provide heat to pre-reform t ...


5
Kishore J Doshi: Enhanced hydrogen recovery from low purity gas streams. Union Carbide Corporation, Alvin H Fritschler, August 16, 1983: US04398926 (55 worldwide citation)

A high pressure as stream having a hydrogen content of up to about 90 mol percent is passed to a separator containing a permeable membrane capable of selectively permeating hydrogen. The separator is used to achieve a bulk separation of the desired hydrogen from impurities contained in the gas strea ...


6
Kishore J Doshi, William B Dolan: Process for the rejection of CO.sub.2 from natural gas. UOP, Thomas K McBride, John G Tolomei, Richard P Silverman, May 2, 1995: US05411721 (48 worldwide citation)

A process for the rejection of carbon dioxide from a natural gas feedstream comprising a gas permeable membrane and a multiple bed pressure swing adsorption system to produce a fixed gas product having a desired concentration of carbon dioxide. The permeate stream from the gas permeable membrane sys ...


7
Kishore J Doshi: Integrated pressure swing adsorption/membrane separation process. Union Carbide Corporation, Morris N Reinisch, November 8, 1988: US04783203 (40 worldwide citation)

An integrated pressure swing adsorption/membrane separation process is disclosed for the separation and purification of at least one gas component of a feed gas in which the purge effluent from the pressure swing adsorption part of the system is passed through a membrane separation unit to produce a ...


8
Kishore J Doshi, Robert G Werner, Michael J Mitariten: Integrated membrane/PSA process and system. UOP, Thomas K McBride, John G Tolomei, September 5, 1989: US04863492 (39 worldwide citation)

A gas separation process and system for integrating a gas permeable membrane system with a multiple bed pressure swing adsorption system to produce a mixed gas product having a preset adjustably controlled gas ratio and a high purity second gas component. The permeate stream from the gas permeable m ...


9
Kishore J Doshi: Enhanced gas separation process. Union Carbide Corporation, Morris N Reinisch, February 24, 1987: US04645516 (32 worldwide citation)

In the purification of gas streams by contact with a permeable membrane selective for the separation of desired components from impurities, harmful gas stream components are removed by means of a pressure swing adsorption system prior to passage of said gas streams to the permeable membrane. Where t ...


10
Robert T Cassidy, Kishore J Doshi: Product recovery in pressure swing adsorption process and system. Union Carbide Corporation, Alvin H Fritschler, July 24, 1984: US04461630 (31 worldwide citation)

A portion of the void space gas released from an adsorbent bed during the cocurrent depressurization thereof, and to be used to provide purge gas, is passed directly to a bed to be purged. The remaining portion of such gas is passed simultaneously to an external surge drum. The gas in the external d ...