Abstract
Transformation of n-butane was studied over HZSM-5, silicalite, ferrisilicate and modified HZSM-5 zeolites. It was found that silicalite gives the lowest conversion and no aromatic selectivity. Modification with gallium has increased conversion as well as aromatic selectivity. HZSM-5 gave the highest conversion and Ga-HZSM-5 (ion exchange) the highest aromatic selectivity. In case of ferrisilicate, conversion was better than silicalite and aromatic selectivity was better even than that of HZSM-5. Both conversion and aromatic selectivity increased profoundly when ferrisilicate was impregnated with gallium. Gallium is thought to enhance both conversion and aromatization.
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