Patents by Inventor Hoanh Nang Pham
Hoanh Nang Pham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8808425Abstract: Apparatus and process for producing a hydrogen-containing product stream and a carbon monoxide-containing product stream from a crude synthesis gas produced in a syngas production unit. Carbon dioxide is removed from the process gas by a non-cryogenic means and the hydrogen-containing product stream is separated from the process gas in a pressure swing adsorber. Residual gas from the pressure swing adsorber is passed to a cryogenic separation unit where the cryogenic separation unit separates the residual gas stream into the carbon monoxide-containing product stream, a hydrogen-enriched stream, a methane-enriched stream, and a carbon monoxide-containing intermediate stream by cryogenic fractionation. At least a portion of the hydrogen-enriched stream is recycled to the pressure swing adsorber.Type: GrantFiled: May 23, 2012Date of Patent: August 19, 2014Assignee: Air Products and Chemicals, Inc.Inventors: Eugene S. Genkin, Hoanh Nang Pham, Xiaoguang Zhang, Keith Alan Ludwig
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Patent number: 8449633Abstract: A steam-hydrocarbon reforming process and apparatus wherein reformate from a prereformer is reacted in a gas heated reformer which is heated by reformed gas from a primary reformer. Reformate from the gas heated reformer is passed to the primary reformer as feed gas.Type: GrantFiled: July 19, 2012Date of Patent: May 28, 2013Assignee: Air Products and Chemicals, Inc.Inventors: Hoanh Nang Pham, Xiang-Dong Peng, Shankar Nataraj, Michael Enever
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Publication number: 20130097929Abstract: A process for producing a hydrogen-containing product gas with reduced carbon dioxide emissions compared to conventional hydrogen production processes. A hydrocarbon and steam are reformed in a reformer and the resulting reformate stream is shifted in at least two shift reactors. The shifted mixture is separated to form a CO2 product stream, the hydrogen-containing product gas, and a pressure swing adsorption tail gas. A fuel gas comprising the pressure swing adsorption tail gas and a supplemental fuel are combusted in the reformer furnace. The H2 concentration in the fuel gas ranges from 35 volume % to 70 volume % and the supplemental fuel provides 5% to 15% of the firing rate.Type: ApplicationFiled: April 25, 2012Publication date: April 25, 2013Applicant: Air Products and Chemicals, Inc.Inventors: Hoanh Nang Pham, Eugene S. Genkin
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Publication number: 20130047665Abstract: Apparatus and process for producing a hydrogen-containing product stream and a carbon monoxide-containing product stream from a crude synthesis gas produced in a syngas production unit. Carbon dioxide is removed from the process gas by a non-cryogenic means and the hydrogen-containing product stream is separated from the process gas in a pressure swing adsorber. Residual gas from the pressure swing adsorber is passed to a cryogenic separation unit where the cryogenic separation unit separates the residual gas stream into the carbon monoxide-containing product stream, a hydrogen-enriched stream, a methane-enriched stream, and a carbon monoxide-containing intermediate stream by cryogenic fractionation. At least a portion of the hydrogen-enriched stream is recycled to the pressure swing adsorber.Type: ApplicationFiled: May 23, 2012Publication date: February 28, 2013Applicant: Air Products and Chemicals, Inc.Inventors: Eugene S. Genkin, Hoanh Nang Pham, Xiaoguang Zhang, Keith Alan Ludwig
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Publication number: 20120282145Abstract: A steam-hydrocarbon reforming process and apparatus wherein reformate from a prereformer is reacted in a gas heated reformer which is heated by reformed gas from a primary reformer. Reformate from the gas heated reformer is passed to the primary reformer as feed gas.Type: ApplicationFiled: July 19, 2012Publication date: November 8, 2012Applicant: Air Products and Chemicals, Inc.Inventors: Hoanh Nang Pham, Xiang-Dong Peng, Shankar Nataraj, Michael Enever
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Patent number: 8287763Abstract: A steam-hydrocarbon reforming process and apparatus wherein reformate from a prereformer is reacted in a gas heated reformer which is heated by reformed gas from a primary reformer. Reformate from the gas heated reformer is passed to the primary reformer as feed gas.Type: GrantFiled: October 28, 2010Date of Patent: October 16, 2012Assignee: Air Products and Chemicals, Inc.Inventors: Hoanh Nang Pham, Xiang-Dong Peng, Shankar Nataraj, Michael Enever
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Publication number: 20120104321Abstract: A steam-hydrocarbon reforming process and apparatus wherein reformate from a prereformer is reacted in a gas heated reformer which is heated by reformed gas from a primary reformer. Reformate from the gas heated reformer is passed to the primary reformer as feed gas.Type: ApplicationFiled: October 28, 2010Publication date: May 3, 2012Applicant: Air Products and Chemicals, Inc.Inventors: Hoanh Nang Pham, Xiang-Dong Peng, Shankar Nataraj, Michael Enever
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Patent number: 7377951Abstract: A steam-hydrocarbon reforming process generating a process gas containing a first amount of heat and a flue gas containing a second amount of heat includes: providing a water heater, a boiler feed water (BFW) preparation system, a boiler, and a BFW heater; feeding water to the water heater; feeding water to the BFW preparation system from the water heater; feeding a first stream of water to the boiler from the BFW preparation system; feeding a second stream of water from the BFW preparation system to the BFW heater; heating at least part of the second stream of water fed to the BFW heater with a first part of the first amount of heat; heating water in the boiler with a second part of the first amount of heat; generating steam at 5-60 psig in the boiler; and heating the BFW preparation system or another internal system with the steam.Type: GrantFiled: April 15, 2005Date of Patent: May 27, 2008Assignee: Air Products and Chemicals, Inc.Inventors: Hoanh Nang Pham, Blaine Edward Herb, Geoffrey Colling Achilles
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Patent number: 7297169Abstract: The present invention is an apparatus arranged to maximize heat utilization for a hydrocarbon steam reforming process to produce synthesis gas. The apparatus comprises a refractory lined vessel with partition walls that divide the inside of the vessel into (1) a combustion chamber(s) containing one or more burners, and (2) convection chambers used as a means to remove combustion products from the combustion chamber through one or more openings at the opposite end of the burner end. The combustion chamber contains one or more reformer tubes in which a mixed-feed of hydrocarbon and steam flow co-current with combustion products and receive direct radiant heat from the combustion flame through the tube wall. The convection chambers contain a tube-in-tube device filled with catalyst in the annuli.Type: GrantFiled: December 24, 2003Date of Patent: November 20, 2007Assignee: Air Products and Chemicals, Inc.Inventors: Hoanh Nang Pham, David Hon Sing Ying, Shoou-I Wang, Scott David Madara, Joel Charles MacMurray
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Patent number: 6793700Abstract: An apparatus for a hydrocarbon reforming process includes a combustion chamber, a convection chamber in fluid communication with the combustion chamber, at least one burner disposed in the combustion chamber, a reaction chamber, a means for flowing a first mixed-feed through a first part of the reaction chamber, and a means for flowing a second mixed-feed through an annular portion of a second part of the reaction chamber, the second part being a tube-in-tube in fluid communication with the first part. The burner(s) generates a flow of a flue gas having a sensible heat from the combustion chamber to the convection chamber. The flow of the flue gas in the convection chamber is counter-currently with the flow of the second mixed-feed.Type: GrantFiled: January 14, 2002Date of Patent: September 21, 2004Assignee: Air Products and Chemicals, Inc.Inventors: Hoanh Nang Pham, Shoou-I Wang, David Hon Sing Ying, Kevin Boyle Fogash
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Publication number: 20040134127Abstract: The present invention is an apparatus arranged to maximize heat utilization for a hydrocarbon steam reforming process to produce synthesis gas. The apparatus comprises a refractory lined vessel with partition walls that divide the inside of the vessel into (1) a combustion chamber(s) containing one or more burners, and (2) convection chambers used as a means to remove combustion products from the combustion chamber through one or more openings at the opposite end of the burner end. The combustion chamber contains one or more reformer tubes in which a mixed-feed of hydrocarbon and steam flow co-current with combustion products and receive direct radiant heat from the combustion flame through the tube wall. The convection chambers contain a tube-in-tube device filled with catalyst in the annuli.Type: ApplicationFiled: December 24, 2003Publication date: July 15, 2004Inventors: Hoanh Nang Pham, David Hon Sing Ying, Shoou-l Wang, Scott David Madara, Joel Charles MacMurray
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Publication number: 20030131533Abstract: An apparatus for a hydrocarbon reforming process includes a combustion chamber, a convection chamber in fluid communication with the combustion chamber, at least one burner disposed in the combustion chamber, a reaction chamber, a means for flowing a first mixed-feed through a first part of the reaction chamber, and a means for flowing a second mixed-feed through an annular portion of a second part of the reaction chamber, the second part being a tube-in-tube in fluid communication with the first part. The burner(s) generates a flow of a flue has having a sensible heat from the combustion chamber to the convection chamber. The flow of the flue has in the convection chamber is counter-currently with the flow of the second mixed-feed.Type: ApplicationFiled: January 14, 2002Publication date: July 17, 2003Inventors: Hoanh Nang Pham, Shoou-I Wang, David Hon Sing Ying, Kevin Boyle Fogash
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Publication number: 20020110505Abstract: An apparatus for heating a fluid in a process having a process heat requirement includes a shell, at least one tube having a design temperature inside the shell, a plurality of burners adjacent the inner wall of the shell, and transfer means whereby flue gas flows from a first interior region to a second interior region of the shell. A first portion of the tube is in the first interior region and a second portion of the tube is in the second interior region. The first and second portions of the tube are adapted to contain a flow of the fluid. The burners produce the flue gas in the first interior region and a variable heat flux approximating the process heat requirement and simultaneously maximizing the heat flux to the first portion of the tube while maintaining substantially all of the first portion of the tube at the design temperature.Type: ApplicationFiled: December 20, 2000Publication date: August 15, 2002Inventors: Shoou-I Wang, David Hon Sing Ying, Hoanh Nang Pham, Blaine Edward Herb, Xianming Li