NOVELTY - Particulate composition having particle distribution size comprises an intimate mixture of petroleum coke and alkali metal gasification catalyst which, in the presence of steam and under suitable temperature and pressure, exhibits gasification activity where several gases i.e. methane and at least one of e.g. hydrogen, are formed. The alkali metal gasification catalyst comprises combination of alkali metal hydroxide with other alkali metal compound e.g. alkali metal carbonate in a weight of 0.01-0.5; and the particulate composition has moisture content of less than or equal to 6 wt.%.    USE - As particulate composition for gasification in a fluidized bed zone for converting petroleum coke into several gaseous products i.e. methane, hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons (claimed).    ADVANTAGE - The particulate composition can be prepared at pressures conditions above the operating pressure of gasification reactor. Hence, the particulate composition can be directly passed into the gasification reactor without further pressurization. The particulate composition can be prepared in a cost effective manner as the alkali metal catalyst is recovered and recycled.    DETAILED DESCRIPTION - A particulate composition having a particle distribution size for gasification in a fluidized bed zone, comprises an intimate mixture of (a) a petroleum coke; and (b) an alkali metal gasification catalyst which, in the presence of steam and under suitable temperature and pressure, exhibits gasification activity where several gases including methane and at least one of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia, and other higher hydrocarbons are formed, where:(i) the alkali metal gasification catalyst comprises a combination of an alkali metal hydroxide with at least one other alkali metal compound selected from alkali metal carbonate, alkali metal bicarbonate, alkali metal formate, alkali metal oxalate, alkali metal amide, alkali metal acetate, alkali metal sulfide, alkali metal halide, and alkali metal nitrate; (ii) the weight ratio of the alkali metal hydroxide to the other alkali metal compounds, in the alkali metal gasification catalyst, is 0.01-0.5; (iii) 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 0.01-0.08; and (iv) the particulate composition has a moisture content of less than or equal to 6 wt.%. INDEPENDENT CLAIMS are included for the following:    (1) converting (p1) a particulate composition into several gaseous products, involving (a) supplying the particulate composition to a gasifying reactor;(b) reacting the particulate composition in the gasifying reactor in the presence of steam and under suitable temperature and pressure to form several gaseous including methane and at least one of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons; and (c) at least partially separating the gaseous products to produce a stream comprising a predominant amount of one of the gaseous products;    (2) preparing (p2) the particulate composition involving (a) providing petroleum coke particulates and an alkali metal gasification catalyst having a combination of an alkali metal hydroxide and at least one other alkali metal compound, where the alkali metal hydroxide is at least 1 wt.% of the combined weight of the petroleum coke particulates and the alkali metal gasification catalyst; (b) contacting the coke particulates with an aqueous solution comprising the alkali metal gasification catalyst to form a slurry; (c) dewatering the slurry to form a wet coke cake loaded with the alkali metal gasification catalyst; and (d) drying the wet coke cake to produce a particulate composition having a moisture content of less than or equal to 6 wt.%.