Patents by Inventor Dennis E. Walsh
Dennis E. Walsh 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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Publication number: 20160257563Abstract: A reforming process and apparatus exhibiting improved catalyst longevity towards reforming a high sulfur-containing liquid fuel. The process involves contacting in a first reforming zone a first oxidant and a liquid fuel containing high molecular weight organosulfur compounds with a partial oxidation catalyst under CPOX reaction conditions to form a first reformate stream containing a mixture of unconverted and partially-converted hydrocarbons and one or more low molecular weight sulfur compounds; and then contacting in a second reforming zone the first reformate stream with steam and optionally a second oxidant in the presence of an autothermal reforming catalyst under ATR reaction conditions to form a second reformate stream containing carbon monoxide and hydrogen and one or more low molecular weight sulfur compounds. The low molecular weight sulfur compounds can be readily removed from the first and/or second reformate streams by gas phase adsorption methods.Type: ApplicationFiled: October 16, 2015Publication date: September 8, 2016Inventors: Subir Roychoudhury, Christian Junaedi, Saurabh Vilekar, Dennis E. Walsh
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Patent number: 9337505Abstract: A process of reforming a liquid fuel comprising from greater than 50 ppmw sulfur to less than 400 ppmw sulfur, the process comprising contacting a liquid hydrocarbon fuel comprising one or more organosulfur compounds in a concentration from greater than 50 ppmw to less than 400 ppmw sulfur with an oxidant and steam or water, the contacting occurring in a catalyst bed comprising a reforming catalyst deposited on an ultra-short-channel-length metal substrate, such that the process is conducted at a peak catalyst temperature greater than 950° C. so as to produce a reformate mixture comprising hydrogen and carbon monoxide.Type: GrantFiled: March 31, 2012Date of Patent: May 10, 2016Assignee: PRECISION COMBUSTION, INC.Inventors: Subir Roychoudhury, Christian Junaedi, Dennis E. Walsh
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Patent number: 9199846Abstract: A reforming process and apparatus exhibiting improved catalyst longevity towards reforming a high sulfur-containing liquid fuel. The process involves contacting in a first reforming zone a first oxidant and a liquid fuel containing high molecular weight organosulfur compounds with a partial oxidation catalyst under CPOX reaction conditions to form a first reformate stream containing a mixture of unconverted and partially-converted hydrocarbons and one or more low molecular weight sulfur compounds; and then contacting in a second reforming zone the first reformate stream with steam and optionally a second oxidant in the presence of an autothermal reforming catalyst under ATR reaction conditions to form a second reformate stream containing carbon monoxide and hydrogen and one or more low molecular weight sulfur compounds. The low molecular weight sulfur compounds can be readily removed from the first and/or second reformate streams by gas phase adsorption methods.Type: GrantFiled: October 3, 2011Date of Patent: December 1, 2015Assignee: Precision Combustion, Inc.Inventors: Subir Roychoudhury, Christian Junaedi, Saurabh Vilekar, Dennis E. Walsh
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Patent number: 9102531Abstract: A method is provided for controlling the operating temperature of a catalytic reactor using a closed-loop system that provides for varying the reactor input and other operating parameters in order to maintain the operating temperature of the reactor at or near the initial setpoint temperature for operation of the reactor. In one example, maximum and minimum operating temperatures with a catalytic partial oxidation reactor are controlled, as well as maintaining control over the corresponding minimum required ratio of oxygen atoms to carbon atoms, such that the operating temperature within the reactor is maintained below the material limits but above threshold temperatures for coking.Type: GrantFiled: September 13, 2012Date of Patent: August 11, 2015Assignee: PRECISION COMBUSTION, INC.Inventors: Subir Roychoudhury, Joel M DesJardins, David Spence, Richard Mastanduno, Dennis E. Walsh, Lisa Burns
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Publication number: 20140017583Abstract: A process of reforming a liquid fuel comprising from greater than 50 ppmw sulfur to less than 400 ppmw sulfur, the process comprising contacting a liquid hydrocarbon fuel comprising one or more organosulfur compounds in a concentration from greater than 50 ppmw to less than 400 ppmw sulfur with an oxidant and steam or water, the contacting occurring in a catalyst bed comprising a reforming catalyst deposited on an ultra-short-channel-length metal substrate, such that the process is conducted at a peak catalyst temperature greater than 950° C. so as to produce a reformate mixture comprising hydrogen and carbon monoxide.Type: ApplicationFiled: March 31, 2012Publication date: January 16, 2014Applicant: Precision Combustion, Inc.Inventors: Subir Roychoudhury, Christian Junaedi, Dennis E. Walsh
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Publication number: 20130174485Abstract: A reforming process and apparatus exhibiting improved catalyst longevity towards reforming a high sulfur-containing liquid fuel. The process involves contacting in a first reforming zone a first oxidant and a liquid fuel containing high molecular weight organosulfur compounds with a partial oxidation catalyst under CPDX reaction conditions to form a first reformate stream containing a mixture of unconverted and partially-converted hydrocarbons and one or more low molecular weight sulfur compounds; and then contacting in a second reforming zone the first reformate stream with steam and optionally a second oxidant in the presence of an autothermal reforming catalyst under ATR reaction conditions to form a second reformate stream containing carbon monoxide and hydrogen and one or more low molecular weight sulfur compounds. The low molecular weight sulfur compounds can be readily removed from the first and/or second reformate streams by gas phase adsorption methods.Type: ApplicationFiled: October 3, 2011Publication date: July 11, 2013Applicant: Precision Combusion Inc.Inventors: Subir Roychoudhury, Christian Junaedi, Saurabh Vilekar, Dennis E. Walsh
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Patent number: 8444951Abstract: The present invention provides a process and apparatus for the gasification of a liquid fuel and includes providing a supply of a liquid fuel, a supply of oxidant, and a supply of liquid water; atomizing the liquid fuel and mixing it with the oxidant and steam; catalytically reacting the fuel-oxidant-steam mixture in a catalyst bed; initiating the catalytic reaction with an ignition source; positioning a heat exchanger in proximity with the catalyst bed so as to convert the liquid water to steam; and feeding the steam into the catalytic reaction, thereby eliminating the need for a liquid fuel vaporizer. A preferred catalyst bed includes an ultra-short-channel-length metal substrate.Type: GrantFiled: October 6, 2010Date of Patent: May 21, 2013Assignee: Precision Combustion, Inc.Inventors: Subir Roychoudhury, Maxim Lyubovsky, Curtis Morgan, Joel DesJardins, Dennis E. Walsh
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Patent number: 8439990Abstract: An apparatus for fuel reforming is provided that utilizes pulsed injectors for a fuel flow controller and an air flow controller, and the injectors are integrated with an atomizing mixer thereby producing a fuel-air mixture having an O/C Ratio which, in turn, is passed to a Catalytic Partial Oxidation reactor. Use of this apparatus permits beneficial long term operation of this Catalytic Partial Oxidation reactor.Type: GrantFiled: July 21, 2009Date of Patent: May 14, 2013Assignees: Precision Combustion, Inc., Honda Motor Co., Ltd.Inventors: Subir Roychoudhury, David Spence, Richard Mastanduno, Dennis E. Walsh, Jun Iwamoto, Go Motohashi, Hitoshi Mikami, Eric Walker
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Patent number: 8337757Abstract: A method is provided for controlling the operating temperature of a catalytic reactor using a closed-loop system that provides for varying the reactor input and other operating parameters in order to maintain the operating temperature of the reactor at or near the initial setpoint temperature for operation of the reactor. In one example, maximum and minimum operating temperatures with a catalytic partial oxidation reactor are controlled, as well as maintaining control over the corresponding minimum required ratio of oxygen atoms to carbon atoms, such that the operating temperature within the reactor is maintained below the material limits but above threshold temperatures for coking.Type: GrantFiled: February 9, 2009Date of Patent: December 25, 2012Assignee: Precision Combustion, Inc.Inventors: Subir Roychoudhury, Joel M. Desjardins, David Spence, Richard Mastanduno, Dennis E. Walsh, William C. Pfefferle
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Publication number: 20110061299Abstract: The present invention provides a process and apparatus for the gasification of a liquid fuel and includes providing a supply of a liquid fuel, a supply of oxidant, and a supply of liquid water; atomizing the liquid fuel and mixing it with the oxidant and steam; catalytically reacting the fuel-oxidant-steam mixture in a catalyst bed; initiating the catalytic reaction with an ignition source; positioning a heat exchanger in proximity with the catalyst bed so as to convert the liquid water to steam; and feeding the steam into the catalytic reaction, thereby eliminating the need for a liquid fuel vaporizer. A preferred catalyst bed includes an ultra-short-channel-length metal substrate.Type: ApplicationFiled: October 6, 2010Publication date: March 17, 2011Inventors: Subir Roychoudhury, Maxim Lyubovsky, Curtis Morgan, Joel DesJardins, Dennis E. Walsh
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Publication number: 20110016791Abstract: An apparatus for fuel reforming is provided that utilizes pulsed injectors for a fuel flow controller and an air flow controller, and the injectors are integrated with an atomizing mixer thereby producing a fuel-air mixture having an O/C Ratio which, in turn, is passed to a Catalytic Partial Oxidation reactor. Use of this apparatus permits beneficial long term operation of this Catalytic Partial Oxidation reactor.Type: ApplicationFiled: July 21, 2009Publication date: January 27, 2011Inventors: Subir Roychoudhury, David Spence, Richard Mastanduno, Dennis E. Walsh, Jun Iwamoto, Go Motohashi, Hitoshi Mikami, Eric Walker
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Publication number: 20090252661Abstract: A fuel reformer includes a reforming portion having a tubular catalytic converter that is composed of a substrate supporting the catalytic component, and is arranged to have a center axis extending along the supply direction of the fuel and oxidizer derived from a supply portion, and a communication passage arranged along an inner wall of the catalytic converter and communicating with the supply portion. The fuel and oxidizer supplied from the supply portion to the communication passage pass from the inner wall of the catalytic converter to an outer wall thereof by forced convection, thereby reforming the fuel.Type: ApplicationFiled: April 7, 2008Publication date: October 8, 2009Inventors: Subir Roychoudhury, David Spence, Richard Mastanduno, Dennis E. Walsh, Jun Iwamoto, Go Motohashi, Hitoshi Mikami, Eric Walker
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Publication number: 20090228146Abstract: A method is provided for controlling the operating temperature of a catalytic reactor using a closed-loop system that provides for varying the reactor input and other operating parameters in order to maintain the operating temperature of the reactor at or near the initial setpoint temperature for operation of the reactor. In one example, maximum and minimum operating temperatures with a catalytic partial oxidation reactor are controlled, as well as maintaining control over the corresponding minimum required ratio of oxygen atoms to carbon atoms, such that the operating temperature within the reactor is maintained below the material limits but above threshold temperatures for coking.Type: ApplicationFiled: February 9, 2009Publication date: September 10, 2009Inventors: Subir Roychoudhury, Joel M. Desjardins, David Spence, Richard Mastanduno, Dennis E. Walsh, William C. Pfefferle
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Patent number: 7396969Abstract: A process for producing alkyl aromatic compounds which comprises contacting at least one aromatic compound with at least one alkylating agent or transalkylating agent possessing at least one aliphatic group having from 1 to 5 carbon atoms under alkylation or transalkylation reaction conditions and in the presence of an alkylation or transalkylation catalyst, to provide an alkylated aromatic product possessing at least one alkyl group derived from said alkylating agent or transalkylating agent, said catalyst comprising a binder-free molecular sieve having an X-ray diffraction pattern that includes the lines set forth in Table A.Type: GrantFiled: April 14, 2005Date of Patent: July 8, 2008Assignee: Mobil Oil CorporationInventors: Jane Chi-Ya Cheng, Terry Eugene Helton, Dominick Nicholas Mazzone, Dennis E. Walsh
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Patent number: 6919491Abstract: A process for producing alkyl aromatic compounds which comprises contacting at least one aromatic compound with at least one alkylating agent or transalkylating agent possessing at least one aliphatic group having from 1 to 5 carbon atoms under alkylation or transalkylation reaction conditions and in the presence of an alkylation or transalkylation catalyst, to provide an alkylated aromatic product possessing at least one alkyl group derived from said alkylating agent or transalkylating agent, said catalyst comprising a binder-free molecular sieve having an X-ray diffraction pattern that includes the lines set forth in Table A.Type: GrantFiled: May 8, 1997Date of Patent: July 19, 2005Assignee: ExxonMobil Oil CorporationInventors: Jane Chi-Ya Cheng, Terry Eugene Helton, Dominick Nicholas Mazzone, Dennis E. Walsh
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Patent number: 6641714Abstract: Low sulfur gasoline of relatively high octane number is produced from a catalytically or thermally cracked, olefin-rich, sulfur-containing hydrocarbon stream by hydrodesulfurization followed by treatment over an acidic catalyst containing a molecular sieve belonging to the MCM-22 family in combination with a metal component, preferably selected from the transition elements of the 4th and 5th periods of the Periodic Table. The treatment over the acidic catalyst in the second step restores the octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product with an octane number comparable to that of the hydrocarbon feed.Type: GrantFiled: July 6, 2001Date of Patent: November 4, 2003Assignee: ExxonMobil Research and Engineering CompanyInventor: Dennis E. Walsh
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Publication number: 20020038776Abstract: Low sulfur gasoline of relatively high octane number is produced from a catalytically or thermally cracked, olefin-rich, sulfur-containing hydrocarbon stream by hydrodesulfurization followed by treatment over an acidic catalyst containing a molecular sieve belonging to the MCM-22 family in combination with a metal component, preferably selected from the transition elements of the 4th and 5th periods of the Periodic Table. The treatment over the acidic catalyst in the second step restores the octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product with an octane number comparable to that of the hydrocarbon feed.Type: ApplicationFiled: July 6, 2001Publication date: April 4, 2002Inventor: Dennis E. Walsh
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Patent number: 6224748Abstract: A process for hydrocracking heavy, high aromatic content feeds, such as cycle oil, using a catalyst composition containing a hydrogenation/dehydrogenation component, such as a noble metal, and an acidic solid component including a Group IVB metal oxide modified with an oxyanion of a Group VIB metal.Type: GrantFiled: December 20, 1993Date of Patent: May 1, 2001Assignee: Mobil Oil CorporationInventors: Clarence D. Chang, Scott Han, Daniel J. Martenak, Jose G. Santiesteban, Dennis E. Walsh
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Patent number: 6217747Abstract: A process for hydrocracking heavy hydrocarbon feeds using a catalyst composition containing a hydrogenation/dehydrogenation component, such as a noble metal, and an acidic solid component including a Group IVB metal oxide modified with an oxyanion of a Group VIB metal. The hydrocracking product has high isoparaffin to normal paraffin ratios and with minimal ethane and methane byproducts at high conversions. The hydrocracking step is useful in processes for producing high quality lubricating oil basestocks, along with naphtha and distillate products.Type: GrantFiled: November 12, 1993Date of Patent: April 17, 2001Assignee: Mobil Oil CorporationInventors: Clarence D. Chang, Scott Han, Daniel J. Martenak, Jose G. Santiesteban, Dennis E. Walsh
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Patent number: 5600048Abstract: There is provided a process for preparing ethylbenzene using liquid phase alkylation and vapor phase transalkylation. The liquid phase alkylation reaction may be catalyzed by an acidic solid oxide, such as MCM-22, MCM-49 and MCM-56. The vapor phase transalkylation may be catalyzed by a medium-pore size zeolite such as ZSM-5. The process may be run continuously with the continuous introduction of fresh benzene feed containing at least 500 ppm of nonbenzene hydrocarbon impurities. The combined ethylbenzene product of these alkylation and transalkylation reactions has very low levels of impurities including xylene, hydrocarbons having 7 or less carbon atoms and hydrocarbons having 9 or more carbon atoms.Type: GrantFiled: December 27, 1994Date of Patent: February 4, 1997Assignee: Mobil Oil CorporationInventors: Jane C. Cheng, C. Morris Smith, Chaya R. Venkat, Dennis E. Walsh