Preparation, Surface Acidity and Catalytic Esterification Activity of Solid Acid S2O2-8/TiO2-La2O3

DOI

10.2991/icmse-16.2016.17How to use a DOI?

Keywords

Solid acid, Titanium sulfate, Lanthanum oxide, Acid properties, Catalytic esterification

Abstract

Solid acid S2O2-8/TiO2-La2O3 (STL) was prepared by calcination at high temperature using complex oxide of TiO2 doped La2O3 as the supporter, and anion S2O2-8 as the accelerant. The catalytic synthesis of n-butyl propanoate over STL was selected as the probe reaction to examine its catalytic esterification activity. The preparing conditions of STL were optimized via Taguchi method. The acidic structure, species and strength of STL were characterized by FTIR directly, FTIR spectrum of pyridine adsorbed on its surface and Hammett indicator, respectively. The esterification product was characterized by 1HNMR and FTIR. The experimental results showed that the optimum preparation conditions were as follows: molar ratio of Ti to La at 5:1, (NH4)2S2O8 solution concentration of 2.0 mol L-1 and calcination temperature of 500 oC. STL belonged to the solid superacid (Ho= 13.75) with Br"nsted acid sites. The esterification rate of above probe reaction could reach 99.3% at the reaction time of 90 min.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jie-Yu He
AU  - Hui Wang
AU  - De-Zhong Liao
AU  - Yun-Kang Jin
PY  - 2016/12
DA  - 2016/12
TI  - Preparation, Surface Acidity and Catalytic Esterification Activity of Solid Acid S2O2-8/TiO2-La2O3
BT  - Proceedings of the 4th 2016 International Conference on Material Science and Engineering (ICMSE 2016)
PB  - Atlantis Press
SP  - 98
EP  - 104
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmse-16.2016.17
DO  - 10.2991/icmse-16.2016.17
ID  - He2016/12
ER  -