SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 57 ›› Issue (5): 98-108.DOI: 10.1016/j.cjche.2022.08.017

• Full Length Article • 上一篇    下一篇

High-performance liquid-phase catalytic purification of phosphine in tail gas using Pd(II)/Cu(II) composite

Chenyang Zhao, Yinhan Cheng, Guangfei Qu, Yongheng Yuan, Fenghui Wu, Ye Liu, Shan Liu, Junyan Li, Ping Ning   

  1. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China;National-Regional Engineering Research Center for Recovery of Waste Gases from Metallurgical and Chemical Industries-NCW, Kunming 650500, China
  • 收稿日期:2022-05-15 修回日期:2022-08-13 出版日期:2023-05-28 发布日期:2023-07-08
  • 通讯作者: Guangfei Qu,E-mail:qgflab@sina.com
  • 基金资助:
    This work is supported by the National Key Research and Development Plan (2018YFC1900203); The National Science Fund for Distinguished Young Scholars (52000094); The National Natural Science Foundation of China (51968033).

High-performance liquid-phase catalytic purification of phosphine in tail gas using Pd(II)/Cu(II) composite

Chenyang Zhao, Yinhan Cheng, Guangfei Qu, Yongheng Yuan, Fenghui Wu, Ye Liu, Shan Liu, Junyan Li, Ping Ning   

  1. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China;National-Regional Engineering Research Center for Recovery of Waste Gases from Metallurgical and Chemical Industries-NCW, Kunming 650500, China
  • Received:2022-05-15 Revised:2022-08-13 Online:2023-05-28 Published:2023-07-08
  • Contact: Guangfei Qu,E-mail:qgflab@sina.com
  • Supported by:
    This work is supported by the National Key Research and Development Plan (2018YFC1900203); The National Science Fund for Distinguished Young Scholars (52000094); The National Natural Science Foundation of China (51968033).

摘要: Pd/Cu liquid-phase composite was utilized as the catalyst in this study to remove PH3 at low temperatures. The anti-heterotoxicity of catalysts in the PH3 catalytic oxidation purification process was carefully explored and pioneered. The catalytic performance, thermodynamics, kinetics, and catalytic oxidation mechanism of Pd/Cu liquid-phase catalyst catalytic oxidation of PH3 were thoroughly investigated. The results showed that Pd/Cu has a superior catalytic effect on the removal of PH3 in the gas mixture under low temperature. With CO as the carrier gas, the removal efficiency of PH3 could be maintained at 100% for nearly 450 min, indicating that the Pd/Cu liquid phase catalyst has good resistance to heterotoxicity. According to the thermodynamic, kinetic, and related characterization results of the PH3 purification process, the kinetic region of the gas–liquid reaction of PH3 absorption by Pd/Cu solution was an interfacial reaction. Pd was the primary catalyst and Cu was the secondary catalyst, and the adsorption of PH3 was a primary reaction. PH3 was spontaneously oxidized to H3PO4 in the Pd/Cu catalytic system during the removal process. Pd was regenerated by O2 and Cu, increasing the activity and stability of the Pd/Cu catalyst in the sustain and efficient purification of PH3 in tail gas.

关键词: Liquid-phase catalysis, Phosphine, Catalytic oxidation, Kinetic analysis, Transition metals

Abstract: Pd/Cu liquid-phase composite was utilized as the catalyst in this study to remove PH3 at low temperatures. The anti-heterotoxicity of catalysts in the PH3 catalytic oxidation purification process was carefully explored and pioneered. The catalytic performance, thermodynamics, kinetics, and catalytic oxidation mechanism of Pd/Cu liquid-phase catalyst catalytic oxidation of PH3 were thoroughly investigated. The results showed that Pd/Cu has a superior catalytic effect on the removal of PH3 in the gas mixture under low temperature. With CO as the carrier gas, the removal efficiency of PH3 could be maintained at 100% for nearly 450 min, indicating that the Pd/Cu liquid phase catalyst has good resistance to heterotoxicity. According to the thermodynamic, kinetic, and related characterization results of the PH3 purification process, the kinetic region of the gas–liquid reaction of PH3 absorption by Pd/Cu solution was an interfacial reaction. Pd was the primary catalyst and Cu was the secondary catalyst, and the adsorption of PH3 was a primary reaction. PH3 was spontaneously oxidized to H3PO4 in the Pd/Cu catalytic system during the removal process. Pd was regenerated by O2 and Cu, increasing the activity and stability of the Pd/Cu catalyst in the sustain and efficient purification of PH3 in tail gas.

Key words: Liquid-phase catalysis, Phosphine, Catalytic oxidation, Kinetic analysis, Transition metals