Patents by Inventor Arunabha Basu

Arunabha Basu 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).

  • Patent number: 9243196
    Abstract: A method of processing synthesis gas improves the quality of the synthesis gas by using a water gas shift reaction to increase the molar ratio of hydrogen to carbon monoxide (H2:CO) in an efficient manner. A first steam of hot natural gas-based synthesis gas having a first higher molar ratio of H2:CO is combined with a second stream of quenched synthesis gas having a second lower molar ratio of H2:CO to provide a blend of synthesis gas having a third molar ratio of H2:CO that is between the first and second molar ratios. A non-catalytic water gas shift reaction increases the molar ratio of H2:CO to a fourth molar ratio that is higher than the third molar ratio, and can be about equal to or greater than the first molar ratio without supplying external heat.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: January 26, 2016
    Assignee: Gas Technology Institute
    Inventors: Bruce G. Bryan, Arunabha Basu, Howard S. Meyer
  • Publication number: 20150299589
    Abstract: A method of processing synthesis gas improves the quality of the synthesis gas by using a water gas shift reaction to increase the molar ratio of hydrogen to carbon monoxide (H2:CO) in an efficient manner. A first steam of hot natural gas-based synthesis gas having a first higher molar ratio of H2:CO is combined with a second stream of quenched synthesis gas having a second lower molar ratio of H2:CO to provide a blend of synthesis gas having a third molar ratio of H2:CO that is between the first and second molar ratios. A non-catalytic water gas shift reaction increases the molar ratio of H2:CO to a fourth molar ratio that is higher than the third molar ratio, and can be about equal to or greater than the first molar ratio without supplying external heat.
    Type: Application
    Filed: March 6, 2015
    Publication date: October 22, 2015
    Inventors: Bruce G. BRYAN, Arunabha BASU, Howard S. MEYER
  • Patent number: 9023310
    Abstract: A process for recovering sulfur from a hydrogen sulfide-bearing gas utilizes an aqueous reaction medium, a temperature of about 110-150° C., and a high enough pressure to maintain the aqueous reaction medium in a liquid state. The process reduces material and equipment costs and addresses the environmental disadvantages associated with known processes that rely on high boiling point organic solvents.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: May 5, 2015
    Assignee: Gas Technology Institute
    Inventor: Arunabha Basu
  • Patent number: 8901178
    Abstract: A method and system for co-production of electric power, fuel, and chemicals in which a synthesis gas at a first pressure is expanded using a turbo-expander, simultaneously producing electric power and an expanded synthesis gas at a second pressure after which the expanded synthesis gas is converted to a fuel and/or a chemical.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: December 2, 2014
    Assignee: Gas Technology Institute
    Inventors: Iosif K. Rabovitser, Arunabha Basu
  • Patent number: 8268896
    Abstract: A method and system for co-production of electric power, fuel, and chemicals in which a synthesis gas at a first pressure is expanded using a stand-alone mechanical expander or a partial oxidation gas turbine, simultaneously producing electric power and an expanded synthesis gas at a second pressure after which the expanded synthesis gas is converted to a fuel and/or a chemical.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: September 18, 2012
    Assignee: Gas Technology Institute
    Inventors: Arunabha Basu, Iosif K Rabovitser, John J Lewnard, John M Pratapas, Howard S Meyer, Dennis Leppin, Dmitri Boulanov
  • Patent number: 8241603
    Abstract: A multi-stage UCSRP process and system for removal of sulfur from a gaseous stream in which the gaseous stream, which contains a first amount of H2S, is provided to a first stage UCSRP reactor vessel operating in an excess SO2 mode at a first amount of SO2, producing an effluent gas having a reduced amount of SO2, and in which the effluent gas is provided to a second stage UCSRP reactor vessel operating in an excess H2S mode, producing a product gas having an amount of H2S less than said first amount of H2S.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: August 14, 2012
    Assignee: Gas Technology Institute
    Inventors: Arunabha Basu, Howard S. Meyer, Scott Lynn, Dennis Leppin, James R. Wangerow
  • Publication number: 20120088850
    Abstract: A method and system for co-production of electric power, fuel, and chemicals in which a synthesis gas at a first pressure is expanded using a turbo-expander, simultaneously producing electric power and an expanded synthesis gas at a second pressure after which the expanded synthesis gas is converted to a fuel and/or a chemical.
    Type: Application
    Filed: December 16, 2011
    Publication date: April 12, 2012
    Applicant: GAS TECHNOLOGY INSTITUTE
    Inventors: Iosif K. Rabovitser, Arunabha Basu
  • Publication number: 20110034569
    Abstract: A method and system for co-production of electric power, fuel, and chemicals in which a synthesis gas at a first pressure is expanded using a stand-alone mechanical expander or a partial oxidation gas turbine, simultaneously producing electric power and an expanded synthesis gas at a second pressure after which the expanded synthesis gas is converted to a fuel and/or a chemical.
    Type: Application
    Filed: February 2, 2010
    Publication date: February 10, 2011
    Applicant: GAS TECHNOLOGY INSTITUTE
    Inventors: Arunabha Basu, Iosif K. Rabovitser, John J. Lewnard, John M. Pratapas, Howard S. Meyer, Dennis Leppin, Dmitri Boulanov
  • Patent number: 6324827
    Abstract: A method of generating power by passing a dimethyl ether-containing fuel to a dry low NOx combustor of a fired turbine-combustor in the presence of an oxygen-containing gas for combustion in the combustor to form flue gas, and then passing the flue gas to the turbine to generate power, wherein the fuel comprises a mixture of dimethyl ether, at least one alcohol and, optionally, a component selected from the group consisting of water and C1-C6 alkanes. The fuel composition used in the inventive method permits a safe and highly efficient operation of a dry low NOx combustion system, while at the same time, minimizing the generation of NOx and carbon monoxide emissions.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: December 4, 2001
    Assignee: BP Corporation North America Inc.
    Inventors: Arunabha Basu, Theo H. Fleisch, Carl A. Udovich, Alakananda Bhattacharyya, Michael J. Gradassi
  • Patent number: 6270541
    Abstract: A diesel fuel composition comprising from about 70 to about 95 weight percent of dimethyl ether, up to about 20 weight percent of methanol, and from about 0.1 to about 20 weight percent of water is disclosed.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: August 7, 2001
    Assignee: BP Corporation North America Inc.
    Inventors: Arunabha Basu, Theodore H. Fleisch, Christopher I. McCarthy, Svend-Erik Mikkelsen, Carl A. Udovich
  • Patent number: 6223519
    Abstract: A power generating method that includes the steps of burning a reformed fuel in the presence of air in a combustor of a gas turbine to generate a hot exhaust gas is disclosed. The hot exhaust gas is then passed through a turbine section of the gas turbine to generate power and, thereafter, the hot exhaust gas is passed through a heat recovery system where the hot exhaust gas is successively cooled as it passes through a series of heat exchangers. Heat exchangers comprising the heat recovery system include combustion air pre-heater(s); a thermochemical recuperator (or reformer), wherein hot exhaust gas provides the endothermic heat of reaction necessary to reform a raw fuel/steam mixture to the combustible, reformed fuel that is eventually burned in the combustor; and one or more water/steam heaters which supply steam to a low-pressure, condensing steam turbine of a bottoming Rankine cycle to generate additional power.
    Type: Grant
    Filed: February 11, 1999
    Date of Patent: May 1, 2001
    Assignee: BP Amoco Corporation
    Inventors: Arunabha Basu, Shankar Rajagopal
  • Patent number: 5906664
    Abstract: The invention relates to high energy, oxygenated fuel compositions suitable for use in compression ignition internal combustion engines which fuel compositions contain a synergistic combination of dimethyl ether, methanol, and water, the combination providing a single liquid phase with good ignition characteristics. More particularly fuels comprising from about 72 to about 95 weight percent of dimethyl ether, from about 0.1 to about 20 weight percent of methanol, and from about 0.1 to about 20 weight percent of water are disclosed.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: May 25, 1999
    Assignee: Amoco Corporation
    Inventors: Arunabha Basu, Theodore H. Fleisch, Christopher I. McCarthy, Svend-Erik Mikkelsen, Carl A. Udovich
  • Patent number: 5740667
    Abstract: Emissions of nitrogen oxides in exhaust from gas turbine systems are reduced, in accordance with the invention, by introducing, into the combustor, a supplementary gaseous stream comprising dihydrogen, carbon monoxide and carbon dioxide, and a stream of gaseous fuel and/or mixtures thereof, with a source of dioxygen to form a combustible gaseous mixture; combusting the mixture to produce heat and a combustion product stream; and driving a turbine with the combustion product stream to produce an exhaust stream and to generate mechanical power. Supplementary gaseous streams are, advantageously, formed by a process for hydroshifting dimethyl ether, i.e. formed by a process which comprises passing a feed stream which includes dimethyl ether and steam to a hydroshifting, reaction zone including an essentially alkali metal-free catalytic composition substantially composed of copper or nickel in elemental form.
    Type: Grant
    Filed: August 22, 1996
    Date of Patent: April 21, 1998
    Assignee: Amoco Corporation
    Inventors: Alakananda Bhattacharyya, Arunabha Basu
  • Patent number: 5632786
    Abstract: A method is described for operating a spark ignition internal combustion engine utilizing an improved composition containing dimethyl ether and propane as fuel. An engine incorporating the invention produces a lesser amount of certain atmospheric pollutants, such as carbon monoxide and unburned hydrocarbons, as compared to the amount of pollutants produced when the engine is operated at identical conditions with propane as fuel. Also described is an improved fuel composition which exhibits a lower vapor pressure than, for example, propane and, therefore, is relatively easier to liquefy and transport.
    Type: Grant
    Filed: September 14, 1995
    Date of Patent: May 27, 1997
    Assignee: Amoco Corporation
    Inventors: Arunabha Basu, Theo H. Fleisch, Christopher I. McCarthy, Carl A. Udovich
  • Patent number: 5626794
    Abstract: A process for hydroshifting dimethyl ether is described which comprises passing a feed stream which includes dimethyl ether and steam to a hydroshifting reaction zone including an essentially alkali metal-free catalytic composition substantially composed of copper or nickel in elemental form. The process produces a hydroshifted product stream which is relatively rich in hydrogen, carbon monoxide, and carbon dioxide.The feed stream can be transported relatively easily in liquid form at comparatively low pressures. The hydroshifting reaction zone can include a hydrolysis reaction zone and a water-gas shift reaction zone. The hydrolyzed product and the water-gas shift product can be recovered to obtain hydrogen and carbon dioxide, respectively. Additionally, the hydroshifted product stream can be blended with an oxidizing stream and combusted to drive a turbine in order to generate mechanical energy.
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: May 6, 1997
    Assignee: Amoco Corporation
    Inventors: Alakananda Bhattacharyya, Arunabha Basu
  • Patent number: 5498370
    Abstract: A process for hydroshifting dimethyl ether is described which comprises passing a feed stream which includes dimethyl ether and steam to a hydroshifting reaction zone including an essentially alkali metal-free catalytic composition substantially composed of copper or nickel in elemental form. The process produces a hydroshifted product stream which is relatively rich in hydrogen, carbon monoxide, and carbon dioxide.The feed stream can be transported relatively easily in liquid form at comparatively low pressures. The hydroshifting reaction zone can include a hydrolysis reaction zone and a water-gas shift reaction zone. The hydrolyzed product and the water-gas shift product can be recovered to obtain hydrogen and carbon dioxide, respectively. Additionally, the hydroshifted product stream can be blended with an oxidizing stream and combusted to drive a turbine in order to generate mechanical energy.
    Type: Grant
    Filed: December 15, 1994
    Date of Patent: March 12, 1996
    Assignee: Amoco Corporation
    Inventors: Alakananda Bhattacharyya, Arunabha Basu
  • Patent number: 5246570
    Abstract: A coal liquefaction process employing a first stage liquefaction step catalyzed by a soluble molybdenum-containing organophosphorodithioate catalyst is disclosed. In some embodiments, two consecutive liquefaction steps employ a molybdenum-containing organophosphorodithioate catalyst operating at a relatively high liquefaction temperature. In other embodiments, a second liquefaction process step operating at a relatively low temperature employs a hydrocracking catalyst to upgrade materials obtained from the first soluble catalyst liquefaction step. In some embodiments, an interstage gas separator removes gases such as carbon dioxide produced in the first liquefaction step from a partially liquefied mixture prior to further liquefying the mixture in the second liquefaction step.
    Type: Grant
    Filed: April 9, 1992
    Date of Patent: September 21, 1993
    Assignee: Amoco Corporation
    Inventors: Donald C. Cronauer, April J. Swanson, Joseph T. Joseph, Arunabha Basu, Simon G. Kukes
  • Patent number: 5228982
    Abstract: A composition consisting essentially of a carbonaceous solid containing at least one carboxyl group is heated with subcritical liquid water at decarboxylation conditions including a temperature of at least about 300.degree. F. to substantially decarboxylate the solid, thereby producing a stream comprising a decarboxylated solid and water. The water is separated from the decarboxylated solid prior to liquefying the solid.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: July 20, 1993
    Assignee: Amoco Corporation
    Inventors: Charles G. Scouten, Arunabha Basu, Joseph T. Joseph