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Propylsulfonic acid functionalized mesoporous silica catalysts for esterification of fatty acids
Chulalongkorn University, Thailand.
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Nanostructured Materials. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-2286-5588
Chulalongkorn University, Thailand.
2015 (English)In: Journal of Molecular Catalysis A: Chemical, ISSN 1381-1169, E-ISSN 1873-314X, Vol. 410, 253-259 p.Article in journal (Refereed) PublishedText
Abstract [en]

The catalytic properties of 3 types of mesoporous silica SBA-15 (rope, rod and fiber), with 9.2 nm or 12.1 nm large mesopores, were examined with respect to their morphology and pore size. Commercially available Amberlyst-15 and the small pore sized MCM-41 were used for comparison. The catalysts were prepared by functionalization of the silica supports with propylsulfonic acid (Pr-SO3H) using postsynthesis grafting with 3 -mercaptopropyltrimethoxysilane as a propyl-thiol precursor. All materials remained in a well-ordered hexagonal mesoporous structure after Pr-SO3H functionalization. The performance of the Pr-SO3H-functionalized mesoporous silicas was evaluated in terms of their catalytic activity in the esterification of oleic acid with short (methanol) and long (glycerol) chain alcohols, i.e., to test the effect of the pore size on the substrate conversion and product yield. The synthesized catalysts were highly active and the product composition could be tuned by selective choice of the mesopore size. The Pr-SO3H-functionalized rope-shaped SBA-15 gave the highest catalytic activity (in terms of the highest methyl oleate and triglyceride yields and oleic acid conversion level), which was higher than that obtained with the commercial Amberlyst-15 catalyst. A high acid amount, large specific surface area and a suitable pore size are the likely reasons for the high yield gained by Pr-SO3H-functionalized rope-shaped SBA-15 silica. (C) 2015 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2015. Vol. 410, 253-259 p.
Keyword [en]
Mesoporous silica; Acid functionalization; Esterification; Fatty acid; Glycerol
National Category
Physical Sciences
URN: urn:nbn:se:liu:diva-123508DOI: 10.1016/j.molcata.2015.10.002ISI: 000365368100030OAI: diva2:886298

Funding Agencies|Grant for International Research Integration: Chula Research Scholar, Ratchadaphiseksomphot Endowment Fund; Post-doctoral Fellowship (Ratchadaphiseksomphot Endowment Fund) Chulalongkorn University; Knut and Alice Wallenberg Foundation [KAW 2012.0083]; Nanolith Sverige AB

Available from: 2015-12-22 Created: 2015-12-21 Last updated: 2016-02-23

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Björk, EmmaOdén, Magnus
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