SCI和EI收录∣中国化工学会会刊

›› 2014, Vol. 22 ›› Issue (10): 1111-1116.DOI: 10.1016/j.cjche.2014.08.007

• 催化、动力学与反应工程 • 上一篇    下一篇

The Modification of Diphenyl Sulfide to Pd/C Catalyst and Its Application in Selective Hydrogenation of p-Chloronitrobenzene

Qunfeng Zhang, Chang Su, Jie Cen, Feng Feng, Lei Ma, Chunshan Lu, Xiaonian Li   

  1. Industrial Catalysis Institute, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, China
  • 收稿日期:2014-04-14 修回日期:2014-07-06 出版日期:2014-10-28 发布日期:2014-12-01
  • 通讯作者: Xiaonian Li
  • 基金资助:
    Supported by National Basic Research Program of China (2011CB710800) and Zhejiang Provincial Natural Science Foundation of China (LY12B03009).

The Modification of Diphenyl Sulfide to Pd/C Catalyst and Its Application in Selective Hydrogenation of p-Chloronitrobenzene

Qunfeng Zhang, Chang Su, Jie Cen, Feng Feng, Lei Ma, Chunshan Lu, Xiaonian Li   

  1. Industrial Catalysis Institute, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, China
  • Received:2014-04-14 Revised:2014-07-06 Online:2014-10-28 Published:2014-12-01
  • Supported by:
    Supported by National Basic Research Program of China (2011CB710800) and Zhejiang Provincial Natural Science Foundation of China (LY12B03009).

摘要: In this study, diphenyl sulfide (Ph2S) was employed to prepare a series of Ph2S-modified Pd/C catalysts (Pd-Ph2S/C). Catalyst characterization carried out by Brunner-Emmet-Teller (BET), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and CO chemisorption uptakemeasurements suggested a chemical interaction between Ph2S and Pd. The ligand was preferably absorbed on the active site of Pd metal but after increasing the amount of Ph2S, the adsorption of Ph2S on Pd metal tended to be saturated and the excess of Ph2S partially adsorbed on the activated carbon. A part of Pd atoms without adsorbing any Ph2S still existed, even for the saturated Pd-Ph2S/C catalyst. The Pd-Ph2S/C catalysts exhibited a good selectivity of p-chloroaniline (p-CAN) in the hydrogenation of p-chloronitrobenzene (p-CNB). However, the chemisorption between Ph2S and Pdwas not so strong that part of Ph2Swas leached fromPd-Ph2S/C catalyst during the hydrogenation,which caused the decline of the selectivity of p-CAN over the used Pd-Ph2S/C catalyst. Resulfidation of the used Pd-Ph2S/C catalystwas effective to resume its stability, and the regenerated Pd-Ph2S/C catalyst could be reused for at least ten runs with a stable catalytic performance.

关键词: Diphenyl sulfide, Modification, p-Chloronitrobenzene, Pd/C, Selective hydrogenation, Stability

Abstract: In this study, diphenyl sulfide (Ph2S) was employed to prepare a series of Ph2S-modified Pd/C catalysts (Pd-Ph2S/C). Catalyst characterization carried out by Brunner-Emmet-Teller (BET), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and CO chemisorption uptakemeasurements suggested a chemical interaction between Ph2S and Pd. The ligand was preferably absorbed on the active site of Pd metal but after increasing the amount of Ph2S, the adsorption of Ph2S on Pd metal tended to be saturated and the excess of Ph2S partially adsorbed on the activated carbon. A part of Pd atoms without adsorbing any Ph2S still existed, even for the saturated Pd-Ph2S/C catalyst. The Pd-Ph2S/C catalysts exhibited a good selectivity of p-chloroaniline (p-CAN) in the hydrogenation of p-chloronitrobenzene (p-CNB). However, the chemisorption between Ph2S and Pdwas not so strong that part of Ph2Swas leached fromPd-Ph2S/C catalyst during the hydrogenation,which caused the decline of the selectivity of p-CAN over the used Pd-Ph2S/C catalyst. Resulfidation of the used Pd-Ph2S/C catalystwas effective to resume its stability, and the regenerated Pd-Ph2S/C catalyst could be reused for at least ten runs with a stable catalytic performance.

Key words: Diphenyl sulfide, Modification, p-Chloronitrobenzene, Pd/C, Selective hydrogenation, Stability