Method and apparatus for producing synthesis gas from carbonaceous materials
OwnerRobert E. Klepperinventor
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Abstract
A method of producing syn gas from biomass or other carbonaceous material utilizes a controlled devolatilization reaction in which the temperature of the feed material is maintained at less than 450° F. until most available oxygen is consumed. This minimizes pyrolysis of the feed material. The method and apparatus utilizes the formed synthesis gas to provide the energy for the necessary gasification. This provides for a high purity syn gas and avoids production of slag.
Claims14
A method of forming syn gas comprising devolatilizing a feed material in a controlled manner at a first temperature low enough to react oxygen in said feed material without causing pyrolysis thereby forming a char;
- subsequently combining said char with steam and passing said steam and char through a heated reaction vessel at a second higher temperature to form syn gas.
An apparatus to produce syn gas comprising a devolatilization section in communication with a gasification section;
- wherein said devolatilization section includes a sealable feed material inlet directed towards a plurality of devolatilization zones leading to said gasification section;
- wherein said gasification section is located in a heated reaction zone;
- a heater directed to force heated air through said reaction zone;
- a steam inlet into said reaction zone downstream of said devolatilization section;
- an exhaust directing said heated air from said reaction zone into indirect contact with said devolatilization section;
- and
- a feeder adapted to force reactants through said reaction zone.
Dependencies are inferred from the claim text.