Separation process study of liquid phase catalytic exchange reaction based on the Pt/C/PTFE catalysts

doi:10.1016/j.cjche.2019.01.019

Abstract

Abstract: The liquid phase catalytic exchange (LPCE) reaction is an effective process for heavy water detritiation and production of deuterium-depleted potable water. In the current study, hydrophobic carbon-supported platinum catalysts (Pt/C/PTFE) with high efficiency as reported previously for LPCE were prepared and comprehensive performance evaluation method is applied to evaluate the separation behaviors of LPCE systematically. Experimental results indicate that the optimum reaction temperature of 60-80℃ and the molar feed ratio G/L of 1.5-2.5 would lead to higher separation efficiencies. As to the packing method, a random packing mode with a packing ratio of hydrophobic catalysts 0.25 is recommended. In addition, thermodynamic analysis corresponds well with experimental results under lower temperature and G/L, while the suppression of kinetic factors should not be neglected when T > 80℃ and G/L > 1.5.

Key words: Liquid phase catalytic exchange (LPCE), Hydrophobic carbon-supported platinum, catalysts, Separation behaviors, Optimal operating condition, Water detritiation

摘要： The liquid phase catalytic exchange (LPCE) reaction is an effective process for heavy water detritiation and production of deuterium-depleted potable water. In the current study, hydrophobic carbon-supported platinum catalysts (Pt/C/PTFE) with high efficiency as reported previously for LPCE were prepared and comprehensive performance evaluation method is applied to evaluate the separation behaviors of LPCE systematically. Experimental results indicate that the optimum reaction temperature of 60-80℃ and the molar feed ratio G/L of 1.5-2.5 would lead to higher separation efficiencies. As to the packing method, a random packing mode with a packing ratio of hydrophobic catalysts 0.25 is recommended. In addition, thermodynamic analysis corresponds well with experimental results under lower temperature and G/L, while the suppression of kinetic factors should not be neglected when T > 80℃ and G/L > 1.5.

关键词: Liquid phase catalytic exchange (LPCE), Hydrophobic carbon-supported platinum, catalysts, Separation behaviors, Optimal operating condition, Water detritiation

Peilong Li, Li Guo, Renjin Xiong, Junhong Luo, Ming Wen, Yong Yao, Zhi Zhang, Jiangfeng Song, Yan Shi, Tao Tang. Separation process study of liquid phase catalytic exchange reaction based on the Pt/C/PTFE catalysts[J]. Chinese Journal of Chemical Engineering, 2019, 27(8): 1837-1845.

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