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Received January 14, 2002
Accepted March 7, 2002
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Propylene Aromatization on Ga-MFI Zeolites
Department of Chemical Engineering, Myongji University, Yongin 449-728, Korea 1School of Chemical Engineering, Seoul National University, Seoul 151-742, Korea
hahm@mju.ac.kr
Korean Journal of Chemical Engineering, May 2002, 19(3), 411-416(6), 10.1007/BF02697148
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Abstract
Propylene aromatization reaction was performed on various MFI type zeolites containing Ga species. The Ga was introduced into the zeolites by substitution (Ga-MFI), ion exchange (GIZ) and physical mixing (GPZ). A commercialized zeolite (PQZSM-5) was also used for comparison. The catalysts prepared were characterized by using XRF, XPS, surface area measurement, NH3-TPD, and H2-TPR. Through the Ga substitution, the acidity of the modified_x000D_
catalysts was decreased, and dehydrogenation and aromatization reactions occurred more easily. The lattice Ga did not react well with hydrogen contrary to the Ga located at the outside of the lattice. It was also found that Ga-MFI catalysts facilitate alkylation reactions.
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