NOVELTY - Catalytically (M1) preparing fluid product from biomass containing lignin, cellulose, hemicellulose and/or lignocellulose involves reacting biomass material in reducing environment in the presence of cosolvent or methanol and catalysts so as to produce fuel or fuel additive fluid product, where the catalysts establish both of the equilibria as given in specification.    USE - For preparing fluid product from biomass containing lignin, cellulose, hemicellulose and/or lignocellulose; and for preparing fluid product from solid carbonaceous material comprising coal, mineral fuels and plastics (claimed).    ADVANTAGE - The catalytic method can convert insoluble solid biomass to soluble materials and gases, thus eliminating the need for separations. The soluble materials produced by the method can be converted to commodity chemicals or mixture of chemicals suitable for combustion in unmodified internal combustion engines, thus the method addresses the goal of reducing demand for petroleum-derived chemicals and fuels and reducing emissions of carbon dioxide. The energy wasted in biomass transport is reduced dramatically if reducing equivalents are regenerated from cellulose in this reaction.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for catalytically (M2) preparing fluid product from solid carbonaceous material comprising coal, mineral fuels and/or plastics involving reacting solid carbonaceous material in the presence of first catalysts to produce soluble material under conditions, where the catalysts establish both of the equilibria as given in specification; depolymerizing polymeric material in the depolymerization catalysts, the polymeric material contained in or derived from the solid carbonaceous material; dehydrating chemical compounds in the presence of dehydration catalysts, the chemical compounds derived from the solid carbonaceous material; and hydrogenating chemical intermediates in the presence of hydrogenation catalysts, the chemical intermediates derived from the solid carbonaceous material, thus produce fluid product.