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Working-state Morphologies of Ion Exchange Catalysts and Their Influence on Reaction Kinetics
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SYSNO ASEP 0353076 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Working-state Morphologies of Ion Exchange Catalysts and Their Influence on Reaction Kinetics Author(s) Jeřábek, Karel (UCHP-M) RID, ORCID, SAI
Hanková, Libuše (UCHP-M) RID
Holub, Ladislav (UCHP-M) RIDSource Title Journal of Molecular Catalysis A-Chemical. - : Elsevier - ISSN 1381-1169
Roč. 333, 1-2 (2010), s. 109-113Number of pages 15 s. Language eng - English Country NL - Netherlands Keywords ion exchanger catalyst ; morphology ; esterification Subject RIV CC - Organic Chemistry CEZ AV0Z40720504 - UCHP-M (2005-2011) UT WOS 000285772600014 DOI 10.1016/j.molcata.2010.10.004 Annotation 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. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2011
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