NOVELTY - A particulate composition (C1) with a particle distribution size for gasification in a fluidized bed zone comprises an intimate mixture of a biomass based carbonaceous feedstock (F1) and a non-biomass carbonaceous feedstock (F2) in a weight ratio of 5:95 to 95:5; and a gasification catalyst. The gasification catalyst comprises a source of at least one alkali metal in an amount to provide a ratio of alkali metal atoms to carbon atoms of 0.01 to 0.10 and it is loaded onto at least one of (F1) or (F2).    USE - As a particulate composition for gasification in a fluidized bed zone used to form gaseous products comprising methane, hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons (Claimed). In integrated gasification processes for converting biomass and non-biomass to combustible gases, such as methane.    ADVANTAGE - The present composition provides a gasification catalyst for the gasification of biomass which overcomes problems of prior art and enables treatment of biomass by maintaining bed composition, fluidization of the bed in the gasification reactor and control of possible liquid phases and agglomeration of the bed in the gasification reactor and char withdrawal.    DETAILED DESCRIPTION - A particulate composition (C1) with a particle distribution size for gasification in a fluidized bed zone comprises an intimate mixture of a biomass based carbonaceous feedstock (F1) and a non-biomass carbonaceous feedstock (F2) in a weight ratio of 5:95 to 95:5; and a gasification catalyst. The gasification catalyst comprises a source of at least one alkali metal in an amount to provide a ratio of alkali metal atoms to carbon atoms of 0.01 to 0.10 and it is loaded onto at least one of (F1) or (F2). The gasification catalyst in the presence of steam and under suitable temperature and pressure, exhibits gasification activity where several gases (G1) comprising methane and at least one of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons are formed. INDEPENDENT CLAIMS are included for the following    (1) a process (P1) for converting a particulate composition into several gaseous products involving (a) supplying particulate composition (C1) to a gasifying reactor; (b) reacting (C1) in the gasifying reactor in the presence of steam and under specific temperature and pressure to form several gases (G1); and (c) at least partially separating the gaseous products to produce a stream comprising a predominant amount of one of the gaseous products; and    (2) a process (P2) for preparing (C1) involving (a) providing a first particulate carbonaceous feedstock that is a biomass, a second particulate carbonaceous feedstock that is a non-biomass, and an alkali metal gasification catalyst (C2) from the particulate composition; (b) mixing the first particulate carbonaceous feedstock, the second particulate carbonaceous feedstock and, the alkali metal gasification catalyst to form a mixture; and(c) optionally thermally treating the mixture under a flow of inert dry gas to form (C1).