Patents by Inventor Gary T. Rochelle
Gary T. Rochelle 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: 8388855Abstract: Novel solvents and methods of use for the removal of CO2 from flue gas, natural gas, hydrogen gas, synthesis gas, and other process and waste gas streams are provided. The solvent contains an alkali salt such as potassium carbonate and a polyamine such as piperazine (PZ) where the polyamine concentration is at least 1.5 equivalents/Kg H2O and the alkali salt concentration is at least 0.5 equivalents/Kg H2O. The preferred alkali salt/polyamine ratio is from approximately 1:2 to 2:1, and no additional alcohol is required for solubilizing the PZ. This chemical solvent and method of use provides efficient and effective removal of CO2 from gaseous streams and other sources.Type: GrantFiled: November 1, 2011Date of Patent: March 5, 2013Assignee: The Board of Regents of the University of Texas SystemInventors: Gary T. Rochelle, John Cullinane
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Publication number: 20120043501Abstract: Novel solvents and methods of use for the removal of CO2 from flue gas, natural gas, hydrogen gas, synthesis gas, and other process and waste gas streams are provided. The solvent contains an alkali salt such as potassium carbonate and a polyamine such as piperazine (PZ) where the polyamine concentration is at least 1.5 equivalents/Kg H2O and the alkali salt concentration is at least 0.5 equivalents/Kg H2O. The preferred alkali salt/polyamine ratio is from approximately 1:2 to 2:1, and no additional alcohol is required for solubilizing the PZ. This chemical solvent and method of use provides efficient and effective removal of CO2 from gaseous streams and other sources.Type: ApplicationFiled: November 1, 2011Publication date: February 23, 2012Applicant: The Board of Regents of the University of Texas SystemInventors: Gary T. Rochelle, John Cullinane
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Patent number: 8070856Abstract: Novel solvents and methods of use for the removal of CO2 from flue gas, natural gas, hydrogen gas, synthesis gas, and other process and waste gas streams are provided. The solvent contains an alkali salt such as potassium carbonate and a polyamine such as piperazine (PZ) where the polyamine concentration is at least 1.5 equivalents/Kg H2O and the alkali salt concentration is at least 0.5 equivalents/Kg H2O. The preferred alkali salt/polyamine ratio is from approximately 1:2 to 2:1, and no additional alcohol is required for solubilizng the PZ. This chemical solvent and method of use provides efficient and effective removal of CO2 from gaseous streams and other sources.Type: GrantFiled: April 1, 2004Date of Patent: December 6, 2011Assignee: The Board of Regents of the University of Texas SystemInventors: Gary T. Rochelle, John Cullinane
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Patent number: 7901487Abstract: An acid gas such as carbon dioxide, hydrogen sulfide, or a mixture thereof is removed from gaseous streams using aqueous absorption and stripping processes. By replacing the conventional stripper used to regenerate the aqueous solvent and capture the acid gas with a multipressure stripper (51) that combines acid gas compression with stripping, less energy is consumed. The multipressure stripper is a multistage flash (52, 55, 59) in which the total vapor flow from each stage is compressed and fed to the bottom of the previous flash stage at a higher pressure. In this process, the heat in the water content of the vapor exiting each stage is utilized at a higher pressure in the previous stage. The described stripping process generates the acid gas at a higher pressure without operating the stripper at a higher temperature, thereby reducing the energy consumption of the system.Type: GrantFiled: March 4, 2004Date of Patent: March 8, 2011Assignee: Board of Regents, The University of Texas SystemInventor: Gary T. Rochelle
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Patent number: 7901488Abstract: Carbon dioxide and other acid gases are removed from gaseous streams using aqueous absorption and stripping processes. By replacing the conventional stripper used to regenerate the aqueous solvent and capture the acid gas with a matrix stripping configuration, less energy is consumed. The matrix stripping configuration uses two or more reboiled strippers at different pressures. The rich feed from the absorption equipment is split among the strippers, and partially regenerated solvent from the highest pressure stripper flows to the middle of sequentially lower pressure strippers in a “matrix” pattern. By selecting certain parameters of the matrix stripping configuration such that the total energy required by the strippers to achieve a desired percentage of acid gas removal from the gaseous stream is minimized, further energy savings can be realized.Type: GrantFiled: October 2, 2007Date of Patent: March 8, 2011Assignee: Board of Regents, The University of Texas SystemInventors: Gary T. Rochelle, Babatunde A. Oyenekan
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Publication number: 20080127831Abstract: Carbon dioxide and other acid gases are removed from gaseous streams using aqueous absorption and stripping processes. By replacing the conventional stripper used to regenerate the aqueous solvent and capture the acid gas with a matrix stripping configuration, less energy is consumed. The matrix stripping configuration uses two or more reboiled strippers at different pressures. The rich feed from the absorption equipment is split among the strippers, and partially regenerated solvent from the highest pressure stripper flows to the middle of sequentially lower pressure strippers in a “matrix” pattern. By selecting certain parameters of the matrix stripping configuration such that the total energy required by the strippers to achieve a desired percentage of acid gas removal from the gaseous stream is minimized, further energy savings can be realized.Type: ApplicationFiled: October 2, 2007Publication date: June 5, 2008Inventors: Gary T. Rochelle, Babatunde A. Oyenekan
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Patent number: 5401481Abstract: The present disclosure relates to improved processes for treating acid gases to remove acid gas components therefrom. Processes in accordance with the present invention include preparing a calcium silicate hydrate sorbent in the form of a semi-dry, free-flowing powder, and treating the gas with the powdery sorbent, such as by injecting the sorbent into a stream of the gas. The powdery sorbents may be prepared by slurrying/drying or pressure hydration techniques. Examples disclosed herein demonstrate the utility of these processes in achieving improved acid gas-absorbing capabilities in both lab-scale and pilot plant studies. Additionally, disclosure is provided which illustrates preferred plant design configurations for employing the present processes using conventional dry sorbent injection equipment. Retrofit application to existing plants is also addressed.Type: GrantFiled: March 15, 1993Date of Patent: March 28, 1995Assignee: Board of Regents, The University of Texas SystemInventors: Gary T. Rochelle, Claus Jorgensen, John C. S. Chang, Theodore G. Brna, Charles B. Sedman, Wojciech Jozewicz
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Patent number: 5270015Type: GrantFiled: August 6, 1991Date of Patent: December 14, 1993Assignee: Board of Regents, The University of Texas SystemInventors: Gary T. Rochelle, Claus Jorgensen, John C. S. Chang, Theodore G. Brna, Charles B. Sedman, Wojciech Jozewicz
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Patent number: 5100643Abstract: The present disclosure relates to improved processes for treating acid gases to remove acid gas components therefrom. Processes in accordance with the present invention include preparing a calcium silicate hydrate sorbent in the form of a semi-dry, free-flowing powder, and treating the gas with the powdery sorbent, such as by injecting the sorbent into a stream of the gas. The powdery sorbents may be prepared by slurrying/drying or pressure hydration techniques. Examples disclosed herein demonstrate the utility of these processes in achieving improved acid gas-absorbing capabilities in both lab-scale and pilot plant studies. Additionally, disclosure is provided which illustrates preferred plant design configurations for employing the present processes using conventional dry sorbent injection equipment. Retrofit application to existing plants is also addressed.Type: GrantFiled: March 2, 1988Date of Patent: March 31, 1992Assignee: Board of Regents, The University of Texas SystemInventors: Theodore G. Brna, Charles B. Sedman, John C. S. Chang, Claus Jorgensen, Gary T. Rochelle
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Patent number: 5047221Abstract: The present disclosure relates to improved processes for treating hot sulfur-containing flue gas to remove sulfur therefrom. Processes in accordance with the present invention include preparing an aqueous slurry composed of a calcium alkali source and a source of reactive silica and/or alumina, heating the slurry to above-ambient temperature for a period of time in order to facilitate the formation of sulfur-absorbing calcium silicates or aluminates, and treating the gas with the heat-treated slurry compounds. Examples disclosed herein demonstrate the utility of these processes in achieving improved sulfur-absorbing capabilities. Additionally, disclosure is provided which illustrates preferred configurations for employing the present processes both as a dry sorbent injection and for use in conjunction with a spray dryer and/or bagfilter. Retrofit application to existing systems is also addressed.Type: GrantFiled: January 22, 1990Date of Patent: September 10, 1991Assignee: Board of Regents, The University of Texas SystemInventors: Wojciech Jozewicz, John C. S. Chang, Charles B. Sedman, Theodore G. Brna, Gary T. Rochelle
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Patent number: 5047222Abstract: The present disclosure relates to improved processes for treating hot sulfur-containing flue gas to remove sulfur therefrom. Processes in accordance with the present invention include preparing an aqueous slurry composed of a calcium alkali source and a source of reactive silica and/or alumina, heating the slurry to above-ambient temperatures for a period of time in order to facilitate the formation of sulfur-absorbing calcium silicates or aluminates, and treating the gas with the heat-treated slurry components. Examples disclosed herein demonstrate the utility of these processes in achieving improved sulfur-absorbing capabilities. Additionally, disclosure is provided which illustrates preferred configurations for employing the present processes both as a dry sorbent injection and for use in conjunction with a spray dryer and/or bagfilter. Retrofit application to existing systems is also addressed.Type: GrantFiled: December 8, 1989Date of Patent: September 10, 1991Assignee: Board of Regents, The University of Texas SystemInventors: Gary T. Rochelle, John C. S. Chang
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Patent number: 4931264Abstract: The present disclosure relates to iThe government may own certain rights in the present invention pursuant to EPA Cooperative Agreement CR 81-1531.This is a continuation of U.S. Ser. No. 928,337, filed Nov. 7, 1986, now U.S. Pat. No. 4,804,521.Type: GrantFiled: August 29, 1988Date of Patent: June 5, 1990Assignee: Board of Regents, The University of Texas SystemInventors: Gary T. Rochelle, Wojciech Jozewicz
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Patent number: 4804521Abstract: The present disclosure relates to improved processes for treating hot sulfur-containing flue gas to remove sulfur therefrom. Processes in accordaThe government may own certain rights in the present invention pursuant to EPA Cooperative Agreement CR 81-1531.Type: GrantFiled: November 7, 1986Date of Patent: February 14, 1989Assignee: Board of Regents, The University of Texas SystemInventors: Gary T. Rochelle, Wojciech Jozewicz