Coal Compositions for Catalytic Gasification
First Claim
Patent Images
1. A particulate composition comprising an intimate mixture of (a) a coal particulate having a size distribution suitable for gasification in a fluidized bed zone;
- (b) a transition metal gasification catalyst;
(c) an alkaline earth metal source; and
(d) an alkali metal gasification catalyst, wherein;
(i) in the presence of steam and under suitable temperature and pressure, the catalysts exhibit gasification activity whereby a plurality of gases including methane and at least one or more of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons are formed;
(ii) the transition metal gasification catalyst is present in an amount sufficient to provide, in the particulate composition, a ratio of transition metal atoms to carbon atoms ranging from 0.001 to about 0.10;
(iii) the alkaline earth metal source is present in an amount sufficient to provide, in the particulate composition, from about 0.1 to about 3.0 wt % alkaline earth metal atoms on a dry basis; and
(iv) the alkali metal gasification catalyst 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 0.08.
2 Assignments
0 Petitions
Accused Products
Abstract
Particulate compositions are described comprising an intimate mixture of a coal and a gasification catalyst in the presence of steam to yield a plurality of gases including methane and at least one or more of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons are formed. Processes are also provided for the preparation of the particulate compositions and converting the particulate composition into a plurality of gaseous products.
152 Citations
19 Claims
-
1. A particulate composition comprising an intimate mixture of (a) a coal particulate having a size distribution suitable for gasification in a fluidized bed zone;
- (b) a transition metal gasification catalyst;
(c) an alkaline earth metal source; and
(d) an alkali metal gasification catalyst, wherein;(i) in the presence of steam and under suitable temperature and pressure, the catalysts exhibit gasification activity whereby a plurality of gases including methane and at least one or more of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons are formed; (ii) the transition metal gasification catalyst is present in an amount sufficient to provide, in the particulate composition, a ratio of transition metal atoms to carbon atoms ranging from 0.001 to about 0.10; (iii) the alkaline earth metal source is present in an amount sufficient to provide, in the particulate composition, from about 0.1 to about 3.0 wt % alkaline earth metal atoms on a dry basis; and (iv) the alkali metal gasification catalyst 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 0.08. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- (b) a transition metal gasification catalyst;
-
13. A process for preparing a particulate composition, comprising the steps of:
-
(a) providing a particulate of a coal feedstock; (b) contacting the particulate with an aqueous solution comprising a transition metal source to form a first slurry; (c) dewatering the first slurry to form a first wet cake; (d) contacting the first wet cake with an aqueous solution comprising an alkaline earth metal source to form a second slurry; (e) dewatering the second slurry to form a second wet cake; (f) contacting the second wet cake with an alkali metal gasification catalyst to form a third wet cake; and (g) drying the third wet cake to provide a particulate composition having a residual moisture content of less than about 6 wt %. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
Specification