Prepararion of Highly Active Esterification Catalyst SBA-15 Mesoporous Silica Functionalized with Sulfonic Acid Group

Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (12): 2332.

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Prepararion of Highly Active Esterification Catalyst SBA-15 Mesoporous Silica Functionalized with Sulfonic Acid Group

YUAN Xing-Dong^1,2, SHEN Jian¹, LI Guo-Hui², ZHOU Jing-Lai², KIM Ji-Man³, PARK Sang-Eon³

1. Department of Petrochemical Technology, Fushun Petroleum Institute, Fushun 113001, China;
2. Institute of Coal Chemistry, Chienese Acadamy of Sciences, Taiyuan 030001, China;
3. Catalysis Center for Molecular Engineering, Korea Research Institute of Chemical Technology(KRICT), PO Box 107, Yusong Taejon 305-600, Korea

Received:2002-02-19 Online:2002-12-24 Published:2002-12-24

Abstract

Abstract: Well-ordered, mesoporous, hybrid SBA-15 materials containing alkyl(methyl) and sulfonic acid group were prepared by post and direct-synthesis methods in the presence of triblock copolymer P123 as the structure-directing agent under acid conditions. The materials have been characterized by powder X-ray diffraction,nitrigon gas sorption(BET), FTIR, themogravimetric weight loss(TGA) and solid state ²⁹Si MAS NMR. XRD result shows the two kinds of catalysts have the SBA-15 structure characters (hexagonal, p6mm). FTIR and ²⁹Si-MAS-NMR results show the surface of SBA-15 functionalized by the organic-silica group and the acid site is B acid site. BET shows them has a large surface area and large pore size. TGA shows they have a higher thermal stability than sulfonic acid resin. They are efficient catalysts for the esterification of methanol with oleic acid. The d-SBA-15-SO₃H catalyst has a higher hydrothermal stability and hydrophobicity than p-SBA-15-SO₃H. The d-SBA-15-SO₃H can be reused many times, and the activity can retain stable. The direct synthesis method is more simple, convenient and efficient comparison with the post synthesis method.

Key words: Mesoporous zeolite, SBA-15, Solid acid, Sulfonic acid, Surface modification, Heterogeneous catalyst, Esterification

CLC Number:

O643

TrendMD:

YUAN Xing-Dong, SHEN Jian, LI Guo-Hui, ZHOU Jing-Lai, KIM Ji-Man, PARK Sang-Eon . Prepararion of Highly Active Esterification Catalyst SBA-15 Mesoporous Silica Functionalized with Sulfonic Acid Group[J]. Chem. J. Chinese Universities, 2002, 23(12): 2332.

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Prepararion of Highly Active Esterification Catalyst SBA-15 Mesoporous Silica Functionalized with Sulfonic Acid Group

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