INFLUENCE OF NATURE OF MODIFIING ACIDS ON THE CATALYTIC ACTIVITY OF NATURAL ZEOLITE IN THE PROCESSING OF HIGH-PARAFFIN OIL RAW IN LONG-CHAINED ELPH-OLEFINS
Keywords:
ammonia thermal desorption, IR-spectroscopy, acid centers, natural zeolite (H-ZSHM), modification, heteropoly acid, super acid, paraffin, cracking, α-olefinsAbstract
Using the methods of thermoprogrammed desorption of ammonia and IR-Spectroscopy using sequential adsorption of CO, we studied the acid characteristics of samples of natural zeolite modified with various in nature acids. Modifications of mineral, as well as a combination of mineral acid with organic, heteropoly acid and superacid lead to a significant increase in the number and strength of Lewis and Brønsted acid centers on the surfaces of natural zeolite samples. Increases in the content of strong acid sites on the surface of catalytic systems in the series H-ZSHM ‒ 10% H-SSA/HZSHM ‒ 10% PW12-HPA/HZSHM ‒ 10% H-SA/HZSHM contribute to the growth of their catalytic activity in the reactions of cracking paraffins into long chain alpha olefins.
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