One Step Hydrodeoxygenation of Fermentative 2,3-Butanediol to Butene over Bifunctional Catalysts

High loading Cu/ZSM-5 catalysts were used to catalyze the conversion of 2,3-butanediol to butene in one step in the presence of hydrogen. The carbon selectivity of butene increased with increasing SiO₂/Al₂O₃ ratio of zeolite and H₂/2,3-butanediol ratio. The optimal reaction temperature is around 250 ^oC.