Synthesis of gasoline-range hydrocarbons over Mo/HZSM-5 catalysts

Mo/HZSM-5 has been found active in Fischer–Tropsch synthesis (FTS). The catalysts were evaluated under various reaction conditions with low H2/CO (molar ratio ∼1.0) syngas typical of a synthesis gas derived from biomass gasification. Liquid hydrocarbons formed on the Mo/HZSM-5 were composed mainly of alkyl-substituted aromatics and lower branched and cyclized alkanes. Aliphatic hydrocarbons were detected only in trace amounts. Lower hydrocarbons produced included mainly methane, ethane, propane and iso-butane. Higher alcohols and carboxylic acids (C1–C6) were detected in the water phase liquids from FTS. It is supposed that the formation of hydrocarbons on Mo/zeolite is through bifunctional-zeolite acidity and molybdenum metal catalysis via mixed alcohols as the intermediates. Investigation on the effects of zeolite structure indicated that zeolite Y is also an excellent support for Mo in the FTS.

Mo/HZSM-5 has been found active for syngas conversion to gasoline-range hydrocarbons mainly composed of alkyl-substituted aromatics and lower branched and cyclized alkanes. Higher alcohols and carboxylic acids (C1–C6) were detected in the water phase liquids from the synthetic reaction. The formation of hydrocarbons on Mo/zeolite is through bifunctional-zeolite acidity and molybdenum metal catalysis via mixed alcohols as the intermediates.Figure optionsDownload as PowerPoint slide