SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2023, Vol. 58 ›› Issue (6): 69-75.DOI: 10.1016/j.cjche.2022.11.007

Previous Articles     Next Articles

Regulation of the selective hydrogenation performance of sulfur-doped carbon-supported palladium on chloronitrobenzene

Qunfeng Zhang, Bingcheng Li, Yuan Zhou, Deshuo Zhang, Chunshan Lu, Feng Feng, Jinghui Lv, Qingtao Wang, Xiaonian Li   

  1. Institute of Industrial Catalysis of Zhejiang University of Technology, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Hangzhou 310014, China
  • Received:2022-07-16 Revised:2022-11-15 Online:2023-08-31 Published:2023-06-28
  • Contact: Qunfeng Zhang,E-mail:zhangqf@zjut.edu.cn;Qingtao Wang,E-mail:qtwang@zjut.edu.cn;Xiaonian Li,E-mail:xnli@zjut.edu.cn
  • Supported by:
    This work was financially supported by the National Natural Science Foundation of China (22078292, 22008212, U20A20119, 21776258).

Regulation of the selective hydrogenation performance of sulfur-doped carbon-supported palladium on chloronitrobenzene

Qunfeng Zhang, Bingcheng Li, Yuan Zhou, Deshuo Zhang, Chunshan Lu, Feng Feng, Jinghui Lv, Qingtao Wang, Xiaonian Li   

  1. Institute of Industrial Catalysis of Zhejiang University of Technology, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Hangzhou 310014, China
  • 通讯作者: Qunfeng Zhang,E-mail:zhangqf@zjut.edu.cn;Qingtao Wang,E-mail:qtwang@zjut.edu.cn;Xiaonian Li,E-mail:xnli@zjut.edu.cn
  • 基金资助:
    This work was financially supported by the National Natural Science Foundation of China (22078292, 22008212, U20A20119, 21776258).

Abstract: The overall performance of metal catalysts can be efficiently adjusted by modifying carbon carriers with different valence sulfur precursors. The wet impregnation technique successfully prepared carbon material carriers doped with varying sources of sulfur (Na2SO4, NaHSO3, Na2S·9H2O). Palladium carbon catalysts doped with different sulfur precursors had been prepared with the aid of the liquid-phase reduction method of the selective hydrogenation of o-chloronitrobenzene (o-CNB) to o-chloroaniline (o-CAN). The catalyst prepared for Na2S·9H2O as a precursor has excellent performance, and the selectivity for o-CAN is more than 99.9% at 100% conversion. In addition, the characterization results show that with the decrease of S valence, the electronic effect between S and Pd increases, and the outer electron shift of Pd increases, which reduces the adsorption and dissociation ability of Pd to hydrogen, resulting in excellent selectivity. The effects provided a good idea for the hydrogenation of o-CNB and a different point of view on sulfur doping in a variety of hydrogenation reactions.

Key words: Catalyst, Hydrogenation, Selectivity, Sulfur doping, Electronic effect

摘要: The overall performance of metal catalysts can be efficiently adjusted by modifying carbon carriers with different valence sulfur precursors. The wet impregnation technique successfully prepared carbon material carriers doped with varying sources of sulfur (Na2SO4, NaHSO3, Na2S·9H2O). Palladium carbon catalysts doped with different sulfur precursors had been prepared with the aid of the liquid-phase reduction method of the selective hydrogenation of o-chloronitrobenzene (o-CNB) to o-chloroaniline (o-CAN). The catalyst prepared for Na2S·9H2O as a precursor has excellent performance, and the selectivity for o-CAN is more than 99.9% at 100% conversion. In addition, the characterization results show that with the decrease of S valence, the electronic effect between S and Pd increases, and the outer electron shift of Pd increases, which reduces the adsorption and dissociation ability of Pd to hydrogen, resulting in excellent selectivity. The effects provided a good idea for the hydrogenation of o-CNB and a different point of view on sulfur doping in a variety of hydrogenation reactions.

关键词: Catalyst, Hydrogenation, Selectivity, Sulfur doping, Electronic effect