Sandwich gasification process for high-efficiency conversion of carbonaceous fuels to clean syngas with zero residual carbon discharge
Patent
·
OSTI ID:1892523
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 an 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.
- Research Organization:
- Univ. of North Dakota, Grand Forks, ND (United States)
- Sponsoring Organization:
- USDOE; US Army Construction Engineering Research Laboratory
- DOE Contract Number:
- FC26-05NT42465
- Assignee:
- Patel, Nikhil Manubhai, Grand Forks, ND (United States)
- Patent Number(s):
- 11,220,641
- Application Number:
- 16/779,775
- OSTI ID:
- 1892523
- Country of Publication:
- United States
- Language:
- English
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