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Citation: ZHAI De-Wei, YUE Ying-Hong, HUA Wei-Ming, GAO Zi. Esterification and Transesterification on Al₂O₃-Doped Sulfated Tin Oxide Solid Acid Catalysts[J]. Acta Physico-Chimica Sinica, ;2010, 26(07): 1867-1872. doi: 10.3866/PKU.WHXB20100709 shu

Esterification and Transesterification on Al₂O₃-Doped Sulfated Tin Oxide Solid Acid Catalysts

1.
Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan Uuniversity, Shanghai 200433, P. R. China

Received Date: 3 February 2010
Available Online: 18 May 2010

A series of Al2O3-doped (0.5%-3.0%, molar fraction) sulfated tin oxide catalysts were prepared by a co-precipitation method. The structures and textural properties of these catalysts were characterized by N2 adsorption, thermogravimetric (TG) analysis, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance infrared Fourier transformspectroscopy (DRIFTS), Raman spectroscopy, and 27Al magic-angle spinning nuclearmagnetic resonance (MAS NMR). The number of acid sites on the catalysts was measured by the potentiometric titration of n-butylamine. Their catalytic performance for the esterification of lauric acid with methanol and the transesterification of triacetin with methanol was also investigated. The results showed that the addition of Al2O3 to sulfated tin oxide improved the catalytic activity markedly. The remarkable activities of the Al2O3-doped catalysts are caused by the larger number of acid sites. The SO2-4/SnO2 catalyst doped with a 1.0% molar fraction of Al2O3 exhibited the highest activity. The lauric acid conversion was 92.7%after esterification for 6 h, and the triacetin conversion was 91.1% after transesterification for 8 h on this catalyst.
- Solid acid,
- Esterification,
- Transesterification,
- Sulfated tin oxide,
- Al2O3-doping
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沈阳化工大学材料科学与工程学院沈阳 110142

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Esterification and Transesterification on Al2O3-Doped Sulfated Tin Oxide Solid Acid Catalysts

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通讯作者: 陈斌, bchen63@163.com

Esterification and Transesterification on Al₂O₃-Doped Sulfated Tin Oxide Solid Acid Catalysts