KINETICS OF CATALYTIC STAGES FOR METHANE AROMATIZATION OVER Mo/HMCM-22 CATALYST

摘要

Rapid development of the world economy and increase of the international oil price urge to diversify energy sources. Gas-To-Liquids (GTL) processes for the production of clean fuels and chemical intermediates are becoming increasingly important and, at present, receive extensive attention. Compared to coal and biomass, natural gas is the favorable feedstock for GTL processes [1]. In addition to Fischer-Tropsch, methanol and dimethyl ether syntheses, non-oxidative methane aromatization presents an interesting possible route for direct conversion of methane/natural gas to liquids [2]. Due to its endothermic nature, the non-catalytic direct pyrolysis of methane requires temperatures exceeding 1400 K and, hence, the total dissociation of methane into carbon and hydrogen becomes unavoidable [3]. Oxidative aromatization of methane is thermodynamically feasible (exothermic process) with C2 selectivity amounting to 60% at 20% methane conversion, at 998 K [4].