TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The step of pyrolyzing the carbonaceous biomass feedstock further comprises pyrolyzing the carbonaceous biomass feedstock in the presence of a hydroprocessing catalyst and/or a high temperature water-gas shift catalyst to catalyze a water-gas shift reaction in which the carbon monoxide reacts with the steam to form additional carbon dioxide and additional hydrogen gas, the additional hydrogen gas at least partially deoxygenating the residual portion of the oxygenated hydrocarbons. The method further comprises: deoxygenating the residual portion of the oxygenated hydrocarbons with additional hydrogen gas produced (60) by reacting the steam with the carbon monoxide at 190-210 degrees C in the presence of a low temperature water-gas shift catalyst, by steam reforming methane in the presence of a steam reforming catalyst at 900-1000 degrees C (preferably 800-1000 degrees C), or its combination and in the presence of a hydroprocessing catalyst, and the deoxygenating the residual portion comprises supplying the additional hydrogen gas to a pyrolysis reactor and/or a hydroprocessing reactor (4); and introducing and distributing additional steam for steam reforming. The step of pyrolyzing the carbonaceous biomass feedstock comprises pyrolyzing the carbonaceous biomass feedstock at pyrolysis temperature maintained by a heat transfer medium comprised of inert solids and/or catalytic solids comprising at least the steam reforming catalyst, and optionally, at least one of a hydroprocessing catalyst and a high temperature water-gas shift catalyst. The step of condensing a condensable portion of the pyrolysis gases further comprises recycling a non-condensable portion of the pyrolysis gases comprising methane back to a dryer and/or to a steam reformer. The method comprises deoxygenating the residual portion of the oxygenated hydrocarbons with hydrogen gas and optionally, additional hydrogen gas, in the presence of hydroprocessing catalyst to form water and to at least partially convert the residual portion of the oxygenated hydrocarbons into hydrocarbons. Preferred Components: The steam reforming catalyst is a nickel (Ni)-on-alumina catalyst and a low-coke forming catalyst comprising metal-substituted apatite and perovskite catalysts. The carbonaceous biomass feedstock having a moisture content of 1-50 wt%, providing substantially all steam for steam reforming. The pyrolysis gases comprises oxygenated hydrocarbons, methane and steam. EXAMPLE - No suitable example given.