Influence of Preparation Conditions on the Catalytic Performance of Mo/H-ZSM-5 for Methane Dehydroaromatization

Methane, the main component of natural gas, is an interesting source chemicals and clean liquid fuels, a promising alternative raw material to oil. Among possible direct routes for methane conversion, its aromatization under non-oxidative conditions has received increasing attention, despite low conversions obtained due thermodynamic limitations, because high selectivity benzene. Mo/H-ZSM-5, first bifunctional zeolite-catalyst proposed this reaction, still considered as one most adequate been widely studied. Although mono- or nature MDA mechanism debate, it generally accepted that Mo species activate C-H bond in methane, producing intermediates. These will aromatize on Brønsted acid sites zeolite, whose pore dimensions provide shape needed converting into An additional role zeolite’s promote dispersion oxide precursor. Here, we show influence different preparation steps—metal incorporation, calcination activation Mo/ZSM-5- metal and, therefore, activity final catalyst. Metal enhanced when samples are calcined dynamic (DC) activated N2, benefits larger incorporated by solid state reaction (SSR), observed FESEM-BSE H2-TPR. This leads catalysts with higher activity, increased aromatic improved stability towards deactivation.