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Vol. 26 No. 11 (2014): Vol 26 Issue 11

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Carbo-Chlorination of Silica: Thermodynamic Simulation and Experimental Study

https://doi.org/10.14233/ajchem.2014.15965
Meilong Hu
College of Materials Science and Engineering, Chongqing University, Chongqing 400030, P.R. China
Mei Song
College of Materials Science and Engineering, Chongqing University, Chongqing 400030, P.R. China
Xuewei Lv
College of Materials Science and Engineering, Chongqing University, Chongqing 400030, P.R. China
Lu Liu
College of Materials Science and Engineering, Chongqing University, Chongqing 400030, P.R. China *Corresponding author: E-mail: hml@cqu.edu.cn
Chenguang Bai
College of Materials Science and Engineering, Chongqing University, Chongqing 400030, P.R. China

Corresponding Author(s) : Meilong Hu

hml@cqu.edu.cn

Asian Journal of Chemistry, Vol. 26 No. 11 (2014): Vol 26 Issue 11

Abstract

Carbo-chlorination of silica represents an interesting route to prepare SiCl4, which is an important precursor used in the chemical industry and microelectronic industry. Chlorination of several silica-containing materials in the presence of carbon was studied at atmospheric pressure in an isothermal reactor at laboratory scale, with continuous and stable gas flow. The influencing factors such as temperature, C/SiO2 mole ratio and binder content in the mixture were studied. The experimental results showed that diatomite is the optimal material for carbo-chlorination to prepare SiCl4. The conversion ratio of silicon dioxide increases with C/SiO2 mole ratio, decreases with binder content increased in the mixture. SiO2 + 2Cl2 + 2C = SiCl4 + 2CO to be the dominant reaction above 800 °C according to the thermodynamic calculation. Based on the results, a probable procedures of the carbo-chlorination is proposed.

Keywords

Carbo-chlorination Silica Silicon tetrachloride
Hu, M., Song, M., Lv, X., Liu, L., & Bai, C. (2014). Carbo-Chlorination of Silica: Thermodynamic Simulation and Experimental Study. Asian Journal of Chemistry, 26(11), 3227–3232. https://doi.org/10.14233/ajchem.2014.15965
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