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SANDWICH GASIFICATION PROCESS FOR HIGH-EFFICIENCY CONVERSION OF CARBONACEOUS FUELS TO CLEAN SYNGAS WITH ZERO RESIDUAL CARBON DISCHARGE

United States Patent Application

20120036777
A1
View the Complete Application at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
The present invention discloses a gasifier and/or a gasification process that provides a long, uniform temperature zone in the gasifier, regardless of the particle size, chemical composition, and moisture content of the fuel by sandwiching a reduction zones between two oxidation zones. The gasifier and/or gasification process has a char that is more energy-dense and almost devoid of moisture that affords for an additional (or char) oxidation zone with a temperature that is higher than a first oxidation zone which is closer to a evaporation and devolatilization zone. As such, the additional (or char) oxidation zone contributes to augmenting the reduction zone temperature, thereby providing a favorable dual impact in improving syngas composition and near-complete conversion of the tar.
Patel, Nikhil Manubhai (Grand Forks, ND)
Energy & Environmental Research Center Foundation
13/ 210,441
August 16, 2011
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] This invention was made with government support from the U.S. Department of Energy under Cooperative Agreement No. DE-FC26-05NT42465 entitled "National Center for Hydrogen Technology" and the U.S. Army Construction Engineering Research Laboratory under Cooperative Agreement No. W9132T-08-2-0014 entitled "Production of JP-8-Based Hydrogen and Advanced Tactical Fuels for the U.S. Military." The government has certain rights in the invention.