Coke accumulation and deactivation behavior of microzeolite-based Mo/HZSM-5 in the non-oxidative methane aromatization under cyclic CH4-H2 feed switch mode
The lifetime coke accumulation and deactivation behavior of Mo/HZSM-5 in the MDA reaction under cyclic CH4-H2 switch mode. Coke accumulation in the first slow deactivation stage caused the rapid decrease of benzene selectivity in the second deactivation stage. Accumulation of graphite-like C on the zeolite surface and in its inner channel mouth region dominated the slow deactivation of the catalyst. Preventing accumulation of graphite-like C becomes the key problem to be solved for designing highly coke-resistant catalyst.