Abstract

HZSM-5 zeolites with SiO2/Al2O3 ratios of 30–280 are pretreated at 773 K and 1173 K. The effect of pretreatment temperature on acidity measured by ammonia desorption and aniline alkylation activity over these zeolites in the entire SiO2/Al2O3 ratio range studied is discussed.

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