초록 ▼

The gasification of coal and other carbonaceous materials by an endothermic gasification reaction is achieved in the presence of a catalyst in a down-flow, moving-bed gasifier. Catalyst is removed along with ash from the gasifier and is then sufficiently heated in a riser/burner by the combustion of

The gasification of coal and other carbonaceous materials by an endothermic gasification reaction is achieved in the presence of a catalyst in a down-flow, moving-bed gasifier. Catalyst is removed along with ash from the gasifier and is then sufficiently heated in a riser/burner by the combustion of residual carbon in the ash to volatilize the catalyst. This volatilized catalyst is returned to the gasifier where it uniformly contacts and condenses on the carbonaceous material. Also, the hot gaseous combustion products resulting from the combustion of the carbon in the ash along with excess air are introduced into the gasifier for providing heat energy used in the endothermic reaction.

대표청구항 ▼

[ what is claimed is:] [1.] Apparatus for the gasification of a carbonaceous material by means of an endothermic gasification reaction and the recycling of a catalyst used for promoting the gasification of the carbonaceous material, comprising: a gasification vessel containing a downward moving bed

[ what is claimed is:] [1.] Apparatus for the gasification of a carbonaceous material by means of an endothermic gasification reaction and the recycling of a catalyst used for promoting the gasification of the carbonaceous material, comprising: a gasification vessel containing a downward moving bed of carbonaceous material, a first conduit means for introducing a stream of carbonaceous material and air into the vessel to maintain said moving bed of carbonaceous material, means for initially introducing a quantity of catalyst into said vessel in an amount sufficient to promote the gasification of the carbonaceous material in said bed in the presence of the air by an endothermic gasification reaction for producing fuel gas and solid gasification products containing residual carbon, a second conduit means for removing the fuel gas from the gasification vessel, a combustion chamber means separate from said gasification vessel, a third conduit means for conveying the solid gasification products including any of said catalyst supported thereby from said gasification vessel into said combustion chamber means, a fourth conduit means for introducing a stream of air into the combustion chamber means in an amount at least sufficient for supporting combustion of residual carbon in the solid gasification products to produce solid and gaseous combustion products and provide a temperature in the combustion chamber means sufficient to volatilize the catalyst supported on the solid gasification products, particulate removing means coupled to said combustion chamber means for separating solid combustion products from the gaseous combustion products and the volatilized catalyst, and a fifth conduit means for conveying the volatilized catalyst and the gaseous combustion products from said combustion chamber into said gasification vessel for providing heat energy for driving said endothermic gasification reaction and for the contact of the volatilized catalyst with the carbonaceous material in said bed.