CVD synthesis in static mode of Mo/H-ZSM5 catalyst for the methane dehydroaromatization reaction to benzene

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Abstract

Chemical vapor deposition (CVD) in a fused ampoule (static mode) was applied for synthesis of the series of Mo/H-ZSM5 catalysts. Kinetic data, TPO and EXAFS observation were evaluated in terms of effective dispersion of MoO3 within the zeolite channels in 3% Mo/H-ZSM5 which provided an excellent activity and stability for methane dehydrocondensation reaction to benzene. The same catalyst doped with 0.5% La2O3 revealed significant suppression of coke and gave a little lower formation rate of benzene, probably due to formation of La2O2CO3 species staying in equilibrium with gas phase of CO2. La2O2CO3 (Ia) phase formation was confirmed by X-ray diffraction experiment.

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