Abstract

Ethane conversion into aromatic hydrocarbons over a high-silica ZSM-5-type zeolite doped with zinc by impregnation has been investigated. The deactivation of the Zn-containing zeolite at different stages of ethane conversion has been studied by temperature-programmed ammonia desorption, differential thermal analysis, high-resolution transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The nature and distribution of active phases and coke deposits on the catalyst surface have been determined. The Zn/ZSM-5 catalyst shows a relatively high activity and stable performance in ethane aromatization.

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