Yunquan Liu from Summit, NJ, age 61

Heat Transfer Unit For Steam Generation And Gas Preheating
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US Patent:

7832364, Nov 16, 2010
Filed:

Dec 14, 2006
Appl. No.:

11/610992
Inventors:

Yunquan Liu - Katy TX, US
Assignee:

Texaco Inc. - San Ramon CA
International Classification:

F24H 1/08
US Classification:

122 181, 122 182, 165163, 165164
Abstract:

The present invention discloses a heat transfer unit which integrates a boiler and a gas preheater for steam generation and gas preheating. In one embodiment, the heat transfer unit of the present invention may be used in fuel processing applications. In this embodiment, the heat transfer unit may be located downstream of a combustor such as an anode tailgas oxidizer.

Process And Apparatus For Thermally Integrated Hydrogen Generation System
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US Patent:

7964176, Jun 21, 2011
Filed:

Mar 29, 2005
Appl. No.:

11/092555
Inventors:

Curtis L. Krause - Houston TX, US
Kevin H. Nguyen - Missouri City TX, US
Bhaskar Balasubramanian - Houston TX, US
Yunquan Liu - Katy TX, US
Jeroen Valensa - Muskego WI, US
Michael J. Reinke - Franklin WI, US
Mark G. Voss - Franksville WI, US
Todd M. Bandhauer - Racine WI, US
Assignee:

Chevron U.S.A. Inc. - San Ramon CA
Modine Manufacturing Company - Racine WI
International Classification:

F28F 1/00
C01B 3/26
US Classification:

423652, 165181, 165177, 481981, 481279
Abstract:

Relates to a process and apparatus that improves the hydrogen production efficiency for small scale hydrogen production. According to one aspect, the process provides heat exchangers that are thermally integrated with the reaction steps such that heat generated by exothermic reactions, combustion and water gas shift, are arranged closely to the endothermic reaction, steam reformation, and heat sinks, cool natural gas, water and air, to minimize heat loss and maximize heat recovery. Effectively, this thermally integrated process eliminates excess piping throughout, reducing initial capital cost.

Small Distributed Gasification Units With Syngas Transportation Via Pipeline Network For Biomass Treatment
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US Patent:

8062392, Nov 22, 2011
Filed:

Dec 17, 2008
Appl. No.:

12/336928
Inventors:

Paul F. Bryan - Pinole CA, US
Yunquan Liu - Katy TX, US
Curtis L. Krause - Houston TX, US
Assignee:

Texaco Inc. - San Ramon CA
International Classification:

C10B 1/00
C10J 3/00
C10J 3/72
B01J 19/00
US Classification:

48 89, 48108, 48111, 48119, 422188
Abstract:

The present invention discloses a system for biomass treatment which addresses the need to find economical solutions to transport biomass. In the present invention, small, distributed gasifiers convert the biomass into synthesis gas (“syngas”). The syngas is then transported via a pipeline network to a central fuel production facility.

Fluidized Bed System For Single Step Reforming For The Production Of Hydrogen
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US Patent:

8241374, Aug 14, 2012
Filed:

Dec 15, 2006
Appl. No.:

11/611638
Inventors:

Farshad Bavarian - Houston TX, US
James F. Stevens - Katy TX, US
Balaji Krishnamurty - Katy TX, US
Yunquan Liu - Katy TX, US
Curtis L. Krause - Houston TX, US
Lixin You - Sugar Land TX, US
Daniel G. Casey - Kingwood TX, US
Assignee:

Texaco Inc. - San Ramon CA
International Classification:

B01J 7/00
C01B 3/36
B01D 59/26
US Classification:

48 61, 48197 R, 96143, 96146
Abstract:

The present invention discloses a fluidized bed system for the single step reforming technology for the production of hydrogen. Single step reforming combines the steam methane reforming, water gas shift, and carbon dioxide removal in a single step process of hydrogen generation. In the present invention, to address the heat transfer and the replenishment issues associated with single step reforming, the sorbent particles are fluidized. This fluidization allows the sorbent particles to be regenerated and consequently allows the optimal operating conditions for single step reforming to be maintained.

Hybrid Combustor For Fuel Processing Applications
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US Patent:

20080141675, Jun 19, 2008
Filed:

Dec 14, 2006
Appl. No.:

11/610983
Inventors:

Yunquan Liu - Katy TX, US
Curtis L. Krause - Houston TX, US
Kevin H. Nguyen - Missouri City TX, US
Assignee:

Texaco Inc. - San Ramon CA
International Classification:

F23Q 11/00
US Classification:

60777
Abstract:

The present invention discloses a hybrid combustor, such as an anode tailgas oxidizer (ATO), for fuel processing applications which combines both flame and catalytic type burners. The hybrid combustor of the present invention combines the advantages of both flame and catalytic type burners. The flame burner component of the hybrid combustor is used during start-up for the preheating of the catalytic burner component. As soon as the catalytic burner bed is preheated or lit off, the flame burner will be shut off. Optionally, the hybrid combustor may also include an integrated heat recovery unit located downstream of the catalytic burner for steam generation and for the preheating of the feed for a reformer, such as an autothermal reformer.

Process And Apparatus For Reforming Gaseous And Liquid Fuels
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US Patent:

20090165368, Jul 2, 2009
Filed:

May 30, 2008
Appl. No.:

12/130376
Inventors:

Yunquan Liu - Katy TX, US
Curtis L. Krause - Houston TX, US
Dennis P. Essl - Sugar Land TX, US
International Classification:

C10L 1/182
US Classification:

44451, 44639
Abstract:

A process for transitioning from gaseous fuel reformation to liquid fuel reformation has been invented. The process comprises a series of control steps wherein an autothermal reforming reactor's temperature can substantially be stable and satisfactory hydrogen concentration and selectivity can be achieved for producer gas during the transition process. The temperature is controlled by, for example, adjusting the air and water feed. Formulas and algorithms for writing control programs have also been developed.

Yunquan Liu