Sandwich gasification process for high-efficiency conversion of carbonaceous fuels to clean syngas with zero residual carbon discharge

Title: Sandwich gasification process for high-efficiency conversion of carbonaceous fuels to clean syngas with zero residual carbon discharge

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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.

Inventors:: Patel, Nikhil Manubhai

Issue Date:: 2018-07-03

OSTI Identifier:: 1462177

Assignee:: Patel, Nikhil NETL

Patent Number(s):: 10,011,792

Application Number:: 13/210,441

Contract Number:: FC26-05NT42465

Resource Relation:: Patent File Date: 2011 Aug 16

Research Org:: National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States)

Sponsoring Org:: USDOE

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 30 DIRECT ENERGY CONVERSION

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