NOVELTY - A particulate composition comprises an intimate mixture including a petroleum coke particulate, coal particulate, transition metal gasification catalyst, alkaline earth metal source and alkali metal gasification catalyst. The petroleum coke particulate and coal particulate have a size distribution suitable for gasification in a fluidized bed zone. The petroleum coke and coal are present in particulate composition at 5:95-95:5 weight ratio.    USE - A particulate composition for conversion into gaseous products comprising methane, and hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and/or other higher hydrocarbons (claimed).    ADVANTAGE - The particulate composition provides for an economical and commercially practical process for catalytic gasification of coals, including lignites or sub-bituminous coal, with high ash and moisture contents to yield methane and other value-added gases as a product; serves to reduce or eliminate some technical challenges associated with catalytic gasification of petroleum coke; and contains a lower average moisture content which increases the efficiency of downstream drying operation versus conventional drying operations.    DETAILED DESCRIPTION - A particulate composition comprises an intimate mixture including a petroleum coke particulate, coal particulate, transition metal gasification catalyst, alkaline earth metal source and alkali metal gasification catalyst. The petroleum coke particulate and coal particulate have a size distribution suitable for gasification in a fluidized bed zone. The petroleum coke and coal are present in particulate composition at 5:95-95:5 weight ratio. The transition metal gasification catalyst, alkaline earth metal source and alkali metal gasification catalyst are loaded onto the coal particulate and/or petroleum coke particulate. The particulate composition exhibits gasification activity, in the presence of steam and under suitable temperature and pressure, where gases including methane and hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and/or other higher hydrocarbons are formed. The transition metal gasification catalyst is present in an amount sufficient to provide, in particulate composition, a ratio of transition metal atoms to carbon atoms of 0.001-0.10. The alkaline earth metal source is present in an amount sufficient to provide, in particulate composition, 0.1-3.0 wt.% alkaline earth metal atoms on a dry basis. The alkali metal gasification catalyst is present in an amount sufficient to provide, in particulate composition, a ratio of alkali metal atoms to carbon atoms of 0.01-0.08. INDEPENDENT CLAIMS are included for:    (1) conversion of particulate composition into gaseous products comprising supplying a particulate composition to a gasification reactor; reacting particulate composition in the presence of steam and under suitable temperature and pressure to form gaseous products including methane and hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and/or other higher hydrocarbons; and partially separating the gaseous products to produce a stream including a predominant amount of one of the gaseous products; and    (2) preparation of particulate composition comprising providing a petroleum coke particulate; providing a first coal feedstock, second coal feedstock and optionally third coal feedstock, each in particulate form; contacting petroleum coke particulate, first coal feedstock, second coal feedstock or third coal feedstock, with a first aqueous solution including a transition metal gasification catalyst to form a first slurry; contacting petroleum coke particulate, first coal feedstock, second coal feedstock or third coal feedstock, other than the one used for contacting with a first aqueous solution, with a second aqueous solution including an alkaline earth metal source to form a second slurry; contacting petroleum coke feedstock, first coal feedstock, second coal feedstock or third coal feedstock, other than the ones already used, with a third aqueous solution including an alkali metal gasification catalyst to form a third slurry; and dewatering first, second and third slurries to form a first wet cake, second wet cake and third wet cake, respectively.    The preparation of particulate composition further comprises:    (1) thermally treating the first, second and third wet cakes with a dry inert gas to provide a first particulate, second particulate and third particulate; and mixing a portion of each of first, second and third particulates to form a particulate composition; or    (2) combining a portion of each of first, second and third wet cakes to form a final wet cake; and optionally thermally treating the final wet cake with a dry inert gas as needed to form a particulate composition.    If the petroleum coke particulate is not used in any contacting steps, the third coal feedstock is provided and is used in one of contacting steps. The petroleum coke particulate is mixed with a portion of each of first, second and third particulates to form a particulate composition. The petroleum coke particulate is mixed with a portion of each of first, second and third wet cakes to form the final wet cake, which is optionally thermally treated with a dry inert gas as needed to form a particulate composition; is mixed with a portion of final wet cake, which is optionally thermally treated with a dry inert gas as needed to form particulate composition; or is mixed with a portion of particulate composition obtained from treated final wet cake.