Patents by Inventor Douglas C. Elliott

Douglas C. Elliott 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).

  • Publication number: 20190071606
    Abstract: A combined hydrothermal liquefaction (HTL) and catalytic hydrothermal gasification (CHG) system and process are described that convert various biomass-containing sources into separable bio-oils and aqueous effluents that contain residual organics. Bio-oils may be converted to useful bio-based fuels and other chemical feedstocks. Residual organics in HTL aqueous effluents may be gasified and converted into medium-BTU product gases and directly used for process heating or to provide energy.
    Type: Application
    Filed: November 2, 2018
    Publication date: March 7, 2019
    Applicant: Battelle Memorial Institute
    Inventors: Douglas C. Elliott, Gary G. Neuenschwander, Todd R. Hart
  • Patent number: 10167430
    Abstract: Embodiments of a method for producing bio-oil include hydrothermal liquefaction of a biomass (e.g., a lignocellulosic biomass) feedstock to provide a process stream comprising crude oil and an aqueous fraction. The process stream is catalytically upgraded by contact with a sulfided-ruthenium catalyst, in the absence of added hydrogen, at a temperature and pressure effective to reduce an oxygen content of the crude oil, reduce a nitrogen content of the crude oil, reduce a total acid number of the crude oil, increase a H:C mole ratio of the crude oil, reduce a density of the crude oil, reduce a moisture content of the crude oil, reduce viscosity of the crude oil, or any combination thereof, thereby producing an upgraded oil and an upgraded aqueous fraction, which are subsequently separated. The catalytic upgrading process may be a plug-flow process and/or may be performed at or near liquefaction conditions.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: January 1, 2019
    Assignee: Battelle Memorial Institute
    Inventors: Todd R. Hart, Douglas C. Elliott, Andrew J. Schmidt, Richard T. Hallen
  • Patent number: 10138426
    Abstract: A combined hydrothermal liquefaction (HTL) and catalytic hydrothermal gasification (CHG) system and process are described that convert various biomass-containing sources into separable bio-oils and aqueous effluents that contain residual organics. Bio-oils may be converted to useful bio-based fuels and other chemical feedstocks. Residual organics in HTL aqueous effluents may be gasified and converted into medium-BTU product gases and directly used for process heating or to provide energy.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: November 27, 2018
    Assignee: Battelle Memorial Institute
    Inventors: Douglas C. Elliott, Gary G. Neuenschwander, Todd R. Hart
  • Publication number: 20180023003
    Abstract: A combined hydrothermal liquefaction (HTL) and catalytic hydrothermal gasification (CHG) system and process are described that convert various biomass-containing sources into separable bio-oils and aqueous effluents that contain residual organics. Bio-oils may be converted to useful bio-based fuels and other chemical feedstocks. Residual organics in HTL aqueous effluents may be gasified and converted into medium-BTU product gases and directly used for process heating or to provide energy.
    Type: Application
    Filed: August 31, 2017
    Publication date: January 25, 2018
    Applicant: Battelle Memorial Institute
    Inventors: Douglas C. Elliott, Gary G. Neuenschwander, Todd R. Hart
  • Publication number: 20170369789
    Abstract: Embodiments of a method for producing bio-oil include hydrothermal liquefaction of a biomass (e.g., a lignocellulosic biomass) feedstock to provide a process stream comprising crude oil and an aqueous fraction. The process stream is catalytically upgraded by contact with a sulfided-ruthenium catalyst, in the absence of added hydrogen, at a temperature and pressure effective to reduce an oxygen content of the crude oil, reduce a nitrogen content of the crude oil, reduce a total acid number of the crude oil, increase a H:C mole ratio of the crude oil, reduce a density of the crude oil, reduce a moisture content of the crude oil, reduce viscosity of the crude oil, or any combination thereof, thereby producing an upgraded oil and an upgraded aqueous fraction, which are subsequently separated. The catalytic upgrading process may be a plug-flow process and/or may be performed at or near liquefaction conditions.
    Type: Application
    Filed: June 28, 2016
    Publication date: December 28, 2017
    Inventors: Todd R. Hart, Douglas C. Elliott, Andrew J. Schmidt, Richard T. Hallen
  • Patent number: 9758728
    Abstract: A combined hydrothermal liquefaction (HTL) and catalytic hydrothermal gasification (CHG) system and process are described that convert various biomass-containing sources into separable bio-oils and aqueous effluents that contain residual organics. Bio-oils may be converted to useful bio-based fuels and other chemical feedstocks. Residual organics in HTL aqueous effluents may be gasified and converted into medium-BTU product gases and directly used for process heating or to provide energy.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: September 12, 2017
    Assignee: Battelle Memorial Institute
    Inventors: Douglas C. Elliott, Gary G. Neuenschwander, Todd R. Hart
  • Patent number: 9404063
    Abstract: A system and process are described for clean separation of biocrudes and water by-products from hydrothermal liquefaction (HTL) product mixtures of organic and biomass-containing feedstocks at elevated temperatures and pressures. Inorganic compound solids are removed prior to separation of biocrude and water by-product fractions to minimize formation of emulsions that impede separation. Separation may be performed at higher temperatures that reduce heat loss and need to cool product mixtures to ambient. The present invention thus achieves separation efficiencies not achieved in conventional HTL processing.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: August 2, 2016
    Assignees: Battelle Memorial Institute, Genifuel Corporation
    Inventors: Douglas C. Elliott, Todd R. Hart, Gary G. Neuenschwander, James R. Oyler, Leslie J. Rotness, Jr., Andrew J. Schmidt, Alan H. Zacher
  • Publication number: 20150126758
    Abstract: A system and process are described for clean separation of biocrudes and water by-products from hydrothermal liquefaction (HTL) product mixtures of organic and biomass-containing feedstocks at elevated temperatures and pressures. Inorganic compound solids are removed prior to separation of biocrude and water by-product fractions to minimize formation of emulsions that impede separation. Separation may be performed at higher temperatures that reduce heat loss and need to cool product mixtures to ambient. The present invention thus achieves separation efficiencies not achieved in conventional HTL processing.
    Type: Application
    Filed: November 5, 2014
    Publication date: May 7, 2015
    Applicants: GENIFUEL CORPORATION, BATTELLE MEMORIAL INSTITUTE
    Inventors: Douglas C. Elliott, Todd R. Hart, Gary G. Neuenschwander, James R. Oyler, Leslie J. Rotness, JR., Andrew J. Schmidt, Alan H. Zacher
  • Patent number: 8877098
    Abstract: Processing of wet biomass feedstock by liquid-phase catalytic hydrothermal gasification must address catalyst fouling and poisoning. One solution can involve heating the wet biomass with a heating unit to a pre-treatment temperature sufficient for organic constituents in the feedstock to decompose, for precipitates of inorganic wastes to form, for preheating the wet feedstock in preparation for subsequent removal of soluble sulfate contaminants, or combinations thereof. Processing further includes reacting the soluble sulfate contaminants with cations present in the feedstock material to yield a sulfate-containing precipitate and separating the inorganic precipitates and/or the sulfate-containing precipitates out of the wet feedstock. Having removed much of the inorganic wastes and the sulfate contaminants that can cause poisoning and fouling, the wet biomass feedstock can be exposed to the heterogeneous catalyst for gasification.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: November 4, 2014
    Assignees: Battelle Memorial Institute, Genifuel Corporation
    Inventors: Douglas C. Elliott, James R. Oyler
  • Publication number: 20140054507
    Abstract: Processing of wet biomass feedstock by liquid-phase catalytic hydrothermal gasification must address catalyst fouling and poisoning. One solution can involve heating the wet biomass with a heating unit to a pre-treatment temperature sufficient for organic constituents in the feedstock to decompose, for precipitates of inorganic wastes to form, for preheating the wet feedstock in preparation for subsequent removal of soluble sulfate contaminants, or combinations thereof. Processing further includes reacting the soluble sulfate contaminants with cations present in the feedstock material to yield a sulfate-containing precipitate and separating the inorganic precipitates and/or the sulfate-containing precipitates out of the wet feedstock. Having removed much of the inorganic wastes and the sulfate contaminants that can cause poisoning and fouling, the wet biomass feedstock can be exposed to the heterogeneous catalyst for gasification.
    Type: Application
    Filed: October 31, 2013
    Publication date: February 27, 2014
    Applicants: GENIFUEL CORPORATION, BATTELLE MEMORIAL INSTITUTE
    Inventors: Douglas C. Elliott, James R. Oyler
  • Patent number: 8608981
    Abstract: Processing of wet biomass feedstock by liquid-phase catalytic hydrothermal gasification must address catalyst fouling and poisoning. One solution can involve heating the wet biomass with a heating unit to a pre-treatment temperature sufficient for organic constituents in the feedstock to decompose, for precipitates of inorganic wastes to form, for preheating the wet feedstock in preparation for subsequent removal of soluble sulfate contaminants, or combinations thereof. Processing further includes reacting the soluble sulfate contaminants with cations present in the feedstock material to yield a sulfate-containing precipitate and separating the inorganic precipitates and/or the sulfate-containing precipitates out of the wet feedstock. Having removed much of the inorganic wastes and the sulfate contaminants that can cause poisoning and fouling, the wet biomass feedstock can be exposed to the heterogeneous catalyst for gasification.
    Type: Grant
    Filed: July 3, 2012
    Date of Patent: December 17, 2013
    Assignees: Battelle Memorial Institute, Genifuel Corporation
    Inventors: Douglas C. Elliott, James Oyler
  • Publication number: 20130331623
    Abstract: A combined hydrothermal liquefaction (HTL) and catalytic hydrothermal gasification (CHG) system and process are described that convert various biomass-containing sources into separable bio-oils and aqueous effluents that contain residual organics. Bio-oils may be converted to useful bio-based fuels and other chemical feedstocks. Residual organics in HTL aqueous effluents may be gasified and converted into medium-BTU product gases and directly used for process heating or to provide energy.
    Type: Application
    Filed: May 13, 2013
    Publication date: December 12, 2013
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: Douglas C. Elliott, Gary G. Neuenschwander, Todd R. Hart
  • Patent number: 8329969
    Abstract: A process for the conversion of biomass derived pyrolysis oil to liquid fuel components is presented. The process includes the production of diesel, aviation, and naphtha boiling point range fuels or fuel blending components by two-stage deoxygenation of the pyrolysis oil and separation of the products.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: December 11, 2012
    Assignee: UOP LLC
    Inventors: Michael J. McCall, Timothy A. Brandvold, Douglas C. Elliott
  • Publication number: 20120280180
    Abstract: Processing of wet biomass feedstock by liquid-phase catalytic hydrothermal gasification must address catalyst fouling and poisoning. One solution can involve heating the wet biomass with a heating unit to a pre-treatment temperature sufficient for organic constituents in the feedstock to decompose, for precipitates of inorganic wastes to form, for preheating the wet feedstock in preparation for subsequent removal of soluble sulfate contaminants, or combinations thereof. Processing further includes reacting the soluble sulfate contaminants with cations present in the feedstock material to yield a sulfate-containing precipitate and separating the inorganic precipitates and/or the sulfate-containing precipitates out of the wet feedstock. Having removed much of the inorganic wastes and the sulfate contaminants that can cause poisoning and fouling, the wet biomass feedstock can be exposed to the heterogeneous catalyst for gasification.
    Type: Application
    Filed: July 3, 2012
    Publication date: November 8, 2012
    Applicant: BATTELLE MEMORIAL INSTITUTE
    Inventors: Douglas C. Elliott, James R. Oyler
  • Patent number: 8241605
    Abstract: Continuous processing of wet biomass feedstock by catalytic hydrothermal gasification must address catalyst fouling and poisoning. One solution can involve heating the wet biomass with a heating unit to a temperature sufficient for organic constituents in the feedstock to decompose, for precipitates of inorganic wastes to form, for preheating the wet feedstock in preparation for subsequent separation of sulfur contaminants, or combinations thereof. Treatment further includes separating the precipitates out of the wet feedstock, removing sulfur contaminants, or both using a solids separation unit and a sulfur separation unit, respectively. Having removed much of the inorganic wastes and the sulfur that can cause poisoning and fouling, the wet biomass feedstock can be exposed to the heterogeneous catalyst for gasification.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: August 14, 2012
    Assignee: Battelle Memorial Institute
    Inventors: Douglas C. Elliott, Robert Scott Butner, Gary G. Neuenschwander, Alan H. Zacher, Todd R. Hart
  • Patent number: 8203023
    Abstract: Novel methods of Fischer-Tropsch synthesis are described. It has been discovered that conducting the Fischer-Tropsch synthesis over a catalyst with a catalytically active surface layer of 35 microns or less results in a liquid hydrocarbon product with a high ratio of C5-C20:C20+. Descriptions of novel Fischer-Tropsch catalysts and reactors are also provided. Novel hydrocarbon compositions with a high ratio of C5-C20:C20+ are also described.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: June 19, 2012
    Assignee: Battelle Memorial Institute
    Inventors: Yong Wang, Chunshe Cao, Xiaohong Shari Li, Douglas C. Elliott
  • Patent number: 7956224
    Abstract: The invention provides palladium-catalyzed hydrogenations of bio-oils and certain organic compounds. Experimental results have shown unexpected and superior results for palladium-catalyzed hydrogenations of organic compounds typically found in bio-oils.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: June 7, 2011
    Assignee: Battelle Memorial Institute
    Inventors: Douglas C. Elliott, Jianli Hu, Todd R. Hart, Gary G. Neuenschwander
  • Patent number: 7858667
    Abstract: Methods for producing alcohols from CO or CO2 and H2 utilizing a palladium-zinc on alumina catalyst are described. Methods of synthesizing alcohols over various catalysts in microchannels are also described. Ethanol, higher alcohols, and other C2+ oxygenates can produced utilizing Rh—Mn or a Fisher-Tropsch catalyst.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: December 28, 2010
    Assignee: Battelle Memorial Institute
    Inventors: Jianli Hu, Robert A. Dagle, Jamelyn D. Holladay, Chunshe Cao, Yong Wang, James F. White, Douglas C. Elliott, Don J. Stevens
  • Publication number: 20100154305
    Abstract: Continuous processing of wet biomass feedstock by catalytic hydrothermal gasification must address catalyst fouling and poisoning. One solution can involve heating the wet biomass with a heating unit to a temperature sufficient for organic constituents in the feedstock to decompose, for precipitates of inorganic wastes to form, for preheating the wet feedstock in preparation for subsequent separation of sulfur contaminants, or combinations thereof. Treatment further includes separating the precipitates out of the wet feedstock, removing sulfur contaminants, or both using a solids separation unit and a sulfur separation unit, respectively. Having removed much of the inorganic wastes and the sulfur that can cause poisoning and fouling, the wet biomass feedstock can be exposed to the heterogeneous catalyst for gasification.
    Type: Application
    Filed: December 19, 2008
    Publication date: June 24, 2010
    Inventors: Douglas C. Elliott, Robert Scott Butner, Gary G. Neuenschwander, Alan H. Zacher, Todd R. Hart
  • Publication number: 20090113787
    Abstract: The invention provides palladium-catalyzed hydrogenations of bio-oils and certain organic compounds. Experimental results have shown unexpected and superior results for palladium-catalyzed hydrogenations of organic compounds typically found in bio-oils.
    Type: Application
    Filed: June 17, 2008
    Publication date: May 7, 2009
    Applicant: Battelle Memorial Institute
    Inventors: Douglas C. Elliott, Jianli Hu, Todd R. Hart, Gary G. Neuenschwander