Influence of Acid Treatment on the Selective Ring Opening of Dcalin over Beta Zeolite

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Abstract

This paper mainly explored the influence of acid treatment on the Br nsted and Lewis acid distribution of Beta zeolites and their catalytic activity for the selective ring opening of decalin. The Beta zeolites treated by different concentration of hydrochloric acid were characterized by XRD, BET, XRF and Py-FTIR. The crystallinity and pore size had no obvious change after acid treatment. The specific surface area of the HCl treated zeolites increased first and then decreased as the concentration of hydrochloric acid increased. Meanwhile, the ratio of SiO₂/Al₂O₃ increased and the total acid content gradually decreased with the increase of the concentration of hydrochloric acid. The Br nsted acid site was mainly modified by the acid treatment as the acid concentration was higher than 0.1 mol/L. The results of activity experiments showed that the Br nsted acid sites played a dominant role in the ring opening of decalin. Higher Br nsted acid sites easily led to deactivation. The catalyst treated by 0.1 mol/L HCl solution exhibited optimum activity owing to its suitable acid sites and high surface area.

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	Zhang Chuanchuan
	Wang Qingfa

Keywords： Beta zeolites； decalin； ring opening； acid treatment； acid sites

Received 2015-04-10;

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Zhang Chuanchuan, Wang Qingfa.Influence of Acid Treatment on the Selective Ring Opening of Dcalin over Beta Zeolite[J] Chemcial Industry and Engineering, 2017,V34(2): 16-20

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