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In this paper, we have studied an increase in the conversion of methane dehydroaromatization (MDA) over Mo and W catalysts supported on HZSM-5. The effects of preactivation of the catalysts and the use of methane/hydrogen cycles on the catalytic activity and stability have been investigated. It was found that the activity was directly related to Brønsted sites on the external surface of HZSM-5 and the regeneration of these sites can augment the conversion in the MDA reaction. Moreover, the use of methane/hydrogen cycles removed a fraction of the coke formed during the reaction and improved the catalytic stability.

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