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Benzene, Toluene, and Xylene Production by Direct Dehydroaromatization of Methane Over WO y /HZSM-5 Catalysts

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Tungsten oxide catalysts supported on HZSM-5 (XWO y /HZSM-5) were prepared with a variation of tungsten oxide loading (X = 4, 6, 8, 10, and 12 wt%) for use in the production of BTX (Benzene, Toluene, and Xylene) through methane dehydroaromatization. The effect of tungsten oxide loading on the acid properties and catalytic activities was investigated. It was found that strong acidity of XWO y /HZSM-5 catalysts showed a volcano-shaped trend with respect to tungsten oxide loading and 8WO y /HZSM-5 catalyst exhibited the highest strong acidity. In the methane dehydroaromatization, acid property of XWO y /HZSM-5 catalysts was closely related to BTX yield. Initial BTX yield increased with increasing strong acidity of the catalysts. Among the catalysts tested, 8WO y /HZSM-5 catalyst with the highest strong acidity showed the best catalytic performance in terms of initial BTX yield. It is concluded that an optimal tungsten oxide loading of XWO y /HZSM-5 catalysts was required for maximum BTX production in the methane dehydroaromatization.
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Keywords: BTX; Methane; Strong Acidity; Tungsten Oxide; Zeolite

Document Type: Research Article

Affiliations: 1: School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Shinlim-dong, Kwanak-ku, Seoul 151-744, South Korea 2: Department of Chemical and Biological Engineering, Korea University, Annam-dong, Sungbuk-ku, Seoul 136-701, South Korea

Publication date: 01 November 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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