NOVELTY - A greater than or equal to 4C compound is prepared by providing water and water soluble oxygenated hydrocarbon in aqueous liquid and/or a vapor phase; reacting water and oxygenated hydrocarbon in presence of aqueous phase reforming catalyst to generate hydrogen (H2); reacting oxygenated hydrocarbon with generated H2 in presence of deoxygenation catalyst to produce oxygenate; and reacting oxygenate in presence of acid catalyst to produce greater than or equal to 4C compound comprising greater than or equal to 4C alcohol, greater than or equal to 4C ketone, greater than or equal to 4C alkane and alkene, greater than or equal to 5C cycloalkene and cycloalkene, aryl and/or fused aryl.    USE - Method for preparing greater than or equal to 4C hydrocarbons including greater than or equal to 4C alkanes, greater than or equal to 4C alkenes, greater than or equal to 5C cycloalkanes, greater than or equal to 5C cycloalkenes, aryls, fused aryls, greater than or equal to 4C alcohols, and/or greater than or equal to 4C ketones (claimed), for fuel products including synthetic gasoline, diesel fuel, and/or jet fuels, and as industrial chemicals.    ADVANTAGE - The compounds are derived from biomass components instead of microorganisms, enzymes, high temperature gasification or transesterification methods. The method can generate hydrogen to avoid reliance on external hydrogen sources including hydrogen generated from steam reforming of natural gas, or electrolysis or thermolysis of water; water which is recyclable; and noncondensable fuel gases for purposes of providing heat source within reactor system or for external processes. The reactor systems can be process controlled, and reactions could proceed at steady-state equilibrium.    DETAILED DESCRIPTION - Preparation of greater than or equal to 4C compound comprises:    (A) providing water and water soluble oxygenated hydrocarbon comprising C1+O1+ in aqueous liquid and/or vapor phase;    (B) reacting portion of water and oxygenated hydrocarbon in presence of aqueous phase reforming catalyst at reforming temperature and pressure to generate H2;    (C) reacting oxygenated hydrocarbon with generated H2 in presence of deoxygenation catalyst at deoxygenation temperature and pressure to produce oxygenate comprising C1+O1-3 in reaction stream; and    (D) reacting oxygenate in presence of acid catalyst at condensation temperature and pressure to produce greater than or equal to 4C compound comprising greater than or equal to 4C alcohol, greater than or equal to 4C ketone, greater than or equal to 4C alkane and alkene, greater than or equal to 5C cycloalkene and cycloalkene, aryl and/or fused aryl.    An INDEPENDENT CLAIM is included for a reactor system configured as continuous flow, batch, semi-batch and/or multi-system, and comprising reactor vessel(s).    DESCRIPTION OF DRAWING(S) - The drawing shows a graph of the thermodynamic equilibriums along the reaction pathway for converting acetone to 2-methyl pentane at different temperatures.