Počet záznamů: 1
Working-state Morphologies of Ion Exchange Catalysts and Their Influence on Reaction Kinetics
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SYSNO ASEP 0353076 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Working-state Morphologies of Ion Exchange Catalysts and Their Influence on Reaction Kinetics Tvůrce(i) Jeřábek, Karel (UCHP-M) RID, ORCID, SAI
Hanková, Libuše (UCHP-M) RID
Holub, Ladislav (UCHP-M) RIDZdroj.dok. Journal of Molecular Catalysis A-Chemical. - : Elsevier - ISSN 1381-1169
Roč. 333, 1-2 (2010), s. 109-113Poč.str. 15 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova ion exchanger catalyst ; morphology ; esterification Vědní obor RIV CC - Organická chemie CEZ AV0Z40720504 - UCHP-M (2005-2011) UT WOS 000285772600014 DOI 10.1016/j.molcata.2010.10.004 Anotace The esterification of fatty acids is an important pretreatment step in the production of biodiesel from low-cost raw materials. It was thus used as a model reaction in a study of the influence of concentration variations of the polar component (methanol) in a reaction mixture on the morphology and functioning of ion exchange catalysts. For a gel-type ion exchange catalyst, a decrease in the methanol concentration proved to have unambiguously negative effects, as it induced de-swelling of the polymer matrix and diminished the accessibility of the active centers. For macroreticular ion exchange catalysts, on the other hand, the drop in methanol concentration had a positive influence on the efficiency of the catalytic action mechanism of the acidic centers. This was due to the existence of some swelling-independent porosity, causing a shift from a general to a specific catalysis-like mechanism. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2011
Počet záznamů: 1