Patents by Inventor Dwain Dodson
Dwain Dodson 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: 20150166910Abstract: Systems to convert a carbonaceous feedstock into a plurality of gaseous products are described. The systems include, among other units, two, three or four separate gasification reactors for the gasification of a carbonaceous feedstock in the presence of an alkali metal catalyst into the plurality of gaseous products including at least methane. Each of the gasification reactors may be supplied with the feedstock from a single or separate catalyst loading and/or feedstock preparation unit operations. Similarly, the hot gas streams from each gasification reactor may be purified via their combination at a heat exchanger, acid gas removal, or methane removal unit operations. Product purification may comprise trace contaminant removal units, ammonia removal and recovery units, and sour shift units.Type: ApplicationFiled: February 23, 2015Publication date: June 18, 2015Inventors: Earl T. Robinson, Francis S. Lau, Dwain Dodson
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Patent number: 8647402Abstract: The present invention relates to processes and continuous processes for preparing gaseous products, and in particular, methane via the catalytic gasification of carbonaceous feedstocks in the presence of steam. In one aspect of the invention, the processes comprise at least partially combusting a first carbonaceous feedstock with an oxygen-rich gas stream in an oxygen-blown gasifier, under suitable temperature and pressure, to generate a first gas stream comprising hydrogen, carbon monoxide and superheated steam; and reacting a second carbonaceous feedstock and the first gas stream in a catalytic gasifier in the presence of a gasification catalyst under suitable temperature and pressure to form a second gas stream comprising a plurality of gaseous products comprising methane, carbon dioxide, hydrogen, carbon monoxide and hydrogen sulfide.Type: GrantFiled: September 18, 2009Date of Patent: February 11, 2014Assignee: Greatpoint Energy, Inc.Inventors: Earl T. Robinson, Francis S. Lau, Pattabhi K. Raman, Vincent G. Reiling, Dwain Dodson, Mustafiz Rahman, Nicholas Charles Nahas
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Publication number: 20100071262Abstract: The present invention relates to processes and continuous processes for preparing gaseous products, and in particular, methane via the catalytic gasification of carbonaceous feedstocks in the presence of steam. In one aspect of the invention, the processes comprise at least partially combusting a first carbonaceous feedstock with an oxygen-rich gas stream in an oxygen-blown gasifier, under suitable temperature and pressure, to generate a first gas stream comprising hydrogen, carbon monoxide and superheated steam; and reacting a second carbonaceous feedstock and the first gas stream in a catalytic gasifier in the presence of a gasification catalyst under suitable temperature and pressure to form a second gas stream comprising a plurality of gaseous products comprising methane, carbon dioxide, hydrogen, carbon monoxide and hydrogen sulfide.Type: ApplicationFiled: September 18, 2009Publication date: March 25, 2010Applicant: GREATPOINT ENERGY, INC.Inventors: Earl T. Robinson, Francis S. Lau, Pattabhi K. Raman, Vincent G. Reiling, Dwain Dodson, Mustafiz Rahman, Nicholas Charles Nahas
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Publication number: 20090324461Abstract: Systems to convert a carbonaceous feedstock into a plurality of gaseous products are described. The systems include, among other units, four separate gasification reactors for the gasification of a carbonaceous feedstock in the presence of an alkali metal catalyst into the plurality of gaseous products including at least methane. Each of the gasification reactors may be supplied with the feedstock from a single or separate catalyst loading and/or feedstock preparation unit operations. Similarly, the hot gas streams from each gasification reactor may be purified via their combination at a heat exchanger, acid gas removal, or methane removal unit operations. Product purification may comprise trace contaminant removal units, ammonia removal and recovery units, and sour shift units.Type: ApplicationFiled: June 26, 2009Publication date: December 31, 2009Applicant: GREATPOINT ENERGY, INC.Inventors: Earl T. Robinson, Francis S. Lau, Dwain Dodson
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Publication number: 20090324459Abstract: Systems to convert a carbonaceous feedstock into a plurality of gaseous products are described. The systems include, among other units, three separate gasification reactors for the gasification of a carbonaceous feedstock in the presence of an alkali metal catalyst into the plurality of gaseous products including at least methane. Each of the gasification reactors may be supplied with the feedstock from a single or separate catalyst loading and/or feedstock preparation unit operations. Similarly, the hot gas streams from each gasification reactor may be purified via their combination at a heat exchanger, acid gas removal or methane removal unit operations. Product purification may comprise trace contaminant removal units, ammonia removal and recovery units, and sour shift units.Type: ApplicationFiled: June 26, 2009Publication date: December 31, 2009Applicant: GREATPOINT ENERGY, INC.Inventors: Earl T. Robinson, Francis S. Lau, Dwain Dodson
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Publication number: 20090324462Abstract: Systems to convert a carbonaceous feedstock into a plurality of gaseous products are described. The systems include, among other units, four separate gasification reactors for the gasification of a carbonaceous feedstock in the presence of an alkali metal catalyst into the plurality of gaseous products including at least methane. Each of the gasification reactors may be supplied with the feedstock from a single or separate catalyst loading and/or feedstock preparation unit operations. Similarly, the hot gas streams from each gasification reactor may be purified via their combination at a heat exchanger, acid gas removal, or methane removal unit operations. Product purification may comprise trace contaminant removal units, ammonia removal and recovery units, and sour shift units.Type: ApplicationFiled: June 26, 2009Publication date: December 31, 2009Applicant: GreatPoint Energy, Inc.Inventors: Earl T. Robinson, Francis S. Lau, Dwain Dodson
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Publication number: 20090324460Abstract: Systems to convert a carbonaceous feedstock into a plurality of gaseous products are described. The systems include, among other units, four separate gasification reactors for the gasification of a carbonaceous feedstock in the presence of an alkali metal catalyst into the plurality of gaseous products including at least methane. Each of the gasification reactors may be supplied with the feedstock from a single or separate catalyst loading and/or feedstock preparation unit operations. Similarly, the hot gas streams from each gasification reactor may be purified via their combination at a heat exchanger, acid gas removal, or methane removal unit operations. Product purification may comprise trace contaminant removal units, ammonia removal and recovery units, and sour shift units.Type: ApplicationFiled: June 26, 2009Publication date: December 31, 2009Applicant: GREATPOINT ENERGY, INC.Inventors: Earl T. Robinson, Francis S. Lau, Dwain Dodson
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Publication number: 20090324458Abstract: Systems for converting a carbonaceous feedstock into a plurality of gaseous products are described. The systems include, among other units, two separate gasification reactors to convert a carbonaceous feedstock in the presence of an alkali metal catalyst into the plurality of gaseous products including at least methane. Each of the gasification reactors may be supplied with the feedstock from a single or separate catalyst loading and/or feedstock preparation unit operations. Similarly, the hot gas streams from each gasification reactor may be purified via their combination at a heat exchanger, acid gas removal, or methane removal unit operations. Product purification may comprise trace contaminant removal units, ammonia removal and recovery units, and sour shift units.Type: ApplicationFiled: June 26, 2009Publication date: December 31, 2009Applicant: GREATPOINT ENERGY, INC.Inventors: Earl T. Robinson, Francis S. Lau, Dwain Dodson