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Desilication of SSZ-33 zeolite – Post-synthesis modification of textural and acidic properties
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SYSNO ASEP 0437627 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Desilication of SSZ-33 zeolite – Post-synthesis modification of textural and acidic properties Tvůrce(i) Kubů, Martin (UFCH-W) RID
Opanasenko, Maksym (UFCH-W) RID, ORCID
Vitvarová, Dana (UFCH-W) RIDZdroj.dok. Catalysis Today. - : Elsevier - ISSN 0920-5861
Roč. 243, APR 2015 (2015), s. 46-52Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova SSZ-33 zeolite ; desilication ; hierarchical materials Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP GP13-17593P GA ČR - Grantová agentura ČR Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000347049900007 EID SCOPUS 84906072765 DOI 10.1016/j.cattod.2014.07.046 Anotace Desilication conditions (concentration of NaOH, duration of the treatment) of SSZ-33 zeolite (CON topology) were investigated in respect to the textural and acidic properties of the obtained materials. As-synthesized borosilicate SSZ-33 was transformed by isomorphous substitution to Al-form. The alkaline treatment of Al-SSZ-33 zeolite resulted in the formation of mesopores and enhanced accessibility of Brønsted acid sites. The increase in the mesopore volume and also changes in the concentration of acid sites depends mainly on the concentration (pH) of the treatment. Simultaneously, the increase in the pH of the alkaline solution led to the slight increase in Brønsted acid sites and substantial decrease in the micropore volume more than 50%, in comparison with the parent material while the volume of mesopores increased significantly. All desilicated SSZ-33 zeolites are characterized by a broad mesopore-size distribution in the range of 5–20 nm with the maximum depending both on the harshness and duration of the treatment. The average size of mesopores increases with increasing pH of NaOH solution. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2016
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