Production of Chemical Compound from Bio-Ethanol by Zeolite Catalysts

Bio-ethanol conversion to hydrocarbons over zeolite catalysts was investigated. Among the zeolites with no metal loaded, H-ZSM-5 (Si/Al2=29) zeolite had especially high activity for the formation of BTX compounds (benzene, toluene, xylenes), while other zeolites exclusively formed ethylene. The addition of Ga and Pd on H-ZSM-5 support resulted in the increased formation of BTX. The addition of Fe and Ni as well as Cr and some noble metals raised the formation of C3+olefins in some degree. Carbon deposition on catalyst occurred during the reaction. In general, the catalysts yielding BTX in high selectivity deposit large amount of carbon, except for the cases of zeolites other than H-ZSM-5. Among the metal catalysts supported on H-ZSM-5 zeolite, Cr, Fe and Au catalysts can inhibit carbon deposition in some degrees and the catalytic activity for the formation of BTX was kept constant.