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Vol. 26 No. 4 (2014): Vol 26 Issue 4

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Epoxidation of Propylene Over Titanosilicate-1 in Fixed-bed Reactor: Experiments and Kinetics

https://doi.org/10.14233/ajchem.2014.15519
Lina Wang
Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China ; Xi'an University of Science and Technology, Xi'an 710054, P.R. China
Yaquan Wang
Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China
Guoqiang Wu
Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China
Wenping Feng
Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China
Teng Zhang
Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China
Rumin Yang
Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China
Xing Jin
Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China
Hainan Shi
Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China
Shuhai Wang
Key Laboratory for Green Chemical Technology of the Ministry of Education, School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, P.R. China

Corresponding Author(s) : Yaquan Wang

wlnkiddy@163.com

Asian Journal of Chemistry, Vol. 26 No. 4 (2014): Vol 26 Issue 4

Abstract

The epoxidation of propylene with hydrogen peroxide over titanosilicate-1 is studied in a fixed-bed reactor with methanol/water as the solvent. The effects of methanol concentration (40-70 wt %), hydrogen peroxide concentration (5-20 wt %), pressure (1.8-3 MPa) and temperature (35-50 °C) on the reaction are investigated. The results show that the reaction rate decreases with increasing reaction pressure, which is opposite to that reported in the literature. The activation energy of the reaction is 57.4 kJ mol-1 and the orders with respects to hydrogen peroxide and propylene are 0.71 and 0.29, respectively. The intrinsic kinetic modeling results show that an Eley-Rideal (H2O2 adsorbed) kinetic model incorporating the effects of hydrogen peroxide, propylene, methanol and propylene oxide satisfactorily agrees with the experimental results.

Keywords

Titanosilicate-1 Epoxidation Fixed-bed reactor Kinetic model
Wang, L., Wang, Y., Wu, G., Feng, W., Zhang, T., Yang, R., … Wang, S. (2014). Epoxidation of Propylene Over Titanosilicate-1 in Fixed-bed Reactor: Experiments and Kinetics. Asian Journal of Chemistry, 26(4), 943–950. https://doi.org/10.14233/ajchem.2014.15519
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