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Catalytic gasification particulate compositions

  • US 8,366,795 B2
  • Filed: 02/27/2009
  • Issued: 02/05/2013
  • Est. Priority Date: 02/29/2008
  • Status: Active Grant
First Claim
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1. A particulate composition having a particle distribution size suitable for gasification in a fluidized bed zone, the particulate composition comprising an intimate mixture of (a) a biomass char leachate comprising one or more soluble alkali metal compounds, and (b) a non-biomass carbonaceous feedstock, wherein:

  • (i) the biomass char leachate comprises an aqueous extract of a biomass char;

    (ii) the particulate composition comprises a gasification catalyst which, in the presence of steam and under suitable temperature and pressure, exhibits gasification activity whereby a plurality of gases comprising methane and one or more gases selected from the group consisting of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons are formed;

    (iii) the gasification catalyst comprises a source of at least one alkali metal and is present in an amount sufficient to provide, in the particulate composition, a ratio of alkali metal atoms to carbon atoms ranging from 0.01 to about 0.10; and

    (iv) the gasification catalyst comprises the one or more soluble alkali metal compounds from the biomass char leachate.

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