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The use of CH4/H2 cycles on dehydroaromatization of methane over MoMCM-22

2007; Elsevier BV; Volume: 9; Issue: 6 Linguagem: Inglês

10.1016/j.catcom.2007.10.007

1873-3905

Alexandre Carlos Camacho Rodrigues, José Luiz Fontes Monteiro,

Catalytic Processes in Materials Science

This work aims to study the non-oxidative conversion of methane in a HMCM-22 zeolite and to compare its activity and stability when using hydrogen regeneration cycles. Catalytic tests were carried with pure methane at atmospheric pressure and 973 K, with WHSV of 90gCH4gMo-1h-1. The use of hydrogen regeneration cycles promoted the increase on catalyst stability by decreasing coke deposits, especially the non-carbidic coke associated to Brønsted acid sites. The use of hydrogen regeneration cycles also affected the selectivity to products, with increase of naphthalene selectivity at the expense of benzene one.