US 2006/0130401 A1Published application

Method of co-producing activated carbon in a circulating fluidized bed gasification process

AssigneeFoster Wheeler Energy Corporation

InventorsRobert Giglio, Zhen Fan, Robert Froehlich, Archibald Robertson, Kumar Sellakumar, Song Wu

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Abstract

A method of co-producing activated carbon in a circulating, fluidized bed gasification process includes gasifying carbonaceous fuel in a fluidized bed to form syngas and char, activating the char to form particles of activated carbon, discharging syngas and particulate solids entrained with the syngas from the reactor, separating entrained solids from the syngas with a particle separator and returning at least a portion of the separated solids to the reaction chamber, but allowing a solids product, including activated carbon and having an average size smaller than a predetermined size, to exit the particle separator with the syngas. The solids product is separated from the syngas in a dust separator to form cleaned syngas, and both the cleaned syngas and the solids product are discharged from the gasifier.

Claims15

Dependent claims

A method of co-producing activated carbon in a circulating fluidized bed gasification process, the method comprising the steps of:

(a) feeding carbonaceous fuel to a reaction chamber of a gasifier to form a particle bed in the reaction chamber;
(b) fluidizing the particle bed with oxygenous gas to partially oxidize the fuel to form syngas and char;
(c) feeding an activation agent comprising at least one of steam and carbon dioxide to the reaction chamber to activate the char to form particulate of activated carbon;
(d) discharging syngas and particulate solids entrained with the syngas from the reaction chamber;
(e) separating entrained solids from the syngas with a particle separator and returning at least a portion of the separated solids through a return duct to the reaction chamber, but allowing a solids product, comprising entrained solids of activated carbon and having an average size smaller than a predetermined size, to exit the particle separator with the syngas;
(f) separating the solids product from the syngas in a dust separator to form cleaned syngas;
(g) discharging the cleaned syngas from the dust separator;
(h) discharging the solids product from the dust separator;
(i) supplying the cleaned syngas to a location for use in at least one of a combustion process and a chemical process;
and
(j) supplying the separated solids product to a location for use in removing contaminants from a fluid.

8 more elements

Dependencies are inferred from the claim text.