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Synthesis of Diphenyl Carbonate over the Magnetic Catalysts Pd/La1-xPbxMnO3 (x=0.2-0.7)

LU Wei, DU Zhiping, YUAN Hua, TIAN Qifeng, WU Yuanxin   

  1. Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
  • Received:2011-07-08 Revised:2011-11-08 Online:2013-02-04 Published:2013-02-28
  • Supported by:

    Supported by the Key Program of National Natural Science Foundation of China (20936003) and the Foundation for Innovation Research Groups of the Natural Science Foundation of Hubei Province (2008CDA009).

Synthesis of Diphenyl Carbonate over the Magnetic Catalysts Pd/La1-xPbxMnO3 (x=0.2-0.7)

鲁威, 杜治平, 袁华, 田琦峰, 吴元欣   

  1. Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, Wuhan 430073, China
  • 通讯作者: WU Yuanxin
  • 基金资助:

    Supported by the Key Program of National Natural Science Foundation of China (20936003) and the Foundation for Innovation Research Groups of the Natural Science Foundation of Hubei Province (2008CDA009).

Abstract: The magnetic perovskite-supported palladium catalysts Pd/La1-xPbxMnO3 (x=0.2-0.7) were prepared and used for the oxidative carbonylation of phenol to diphenyl carbonate. The synthesized catalysts were characterized by the X-ray diffraction (XRD), surface area measurement BET, vibration sample magnetometer (VSM) and temperature-programmed reduction (TPR). The experimental results demonstrated that the magnetic Pd/La1-xPbxMnO3 (x=0.4-0.5) obtain relative better catalytic activity. It can be explained by higher concentration of oxygen vacancies, larger amount and better mobility of lattice oxygen of their support. Furthermore, these samples possess sufficient saturated magnetization. Thus, Pd/La1-xPbxMnO3 (x=0.4-0.5) may be suitable for operation in the magnetically stabilized bed reactor.

Key words: diphenyl carbonate, perovskite-type oxides, magnetic catalyst, magnetically stabilized bed reactor

摘要: The magnetic perovskite-supported palladium catalysts Pd/La1-xPbxMnO3 (x=0.2-0.7) were prepared and used for the oxidative carbonylation of phenol to diphenyl carbonate. The synthesized catalysts were characterized by the X-ray diffraction (XRD), surface area measurement BET, vibration sample magnetometer (VSM) and temperature-programmed reduction (TPR). The experimental results demonstrated that the magnetic Pd/La1-xPbxMnO3 (x=0.4-0.5) obtain relative better catalytic activity. It can be explained by higher concentration of oxygen vacancies, larger amount and better mobility of lattice oxygen of their support. Furthermore, these samples possess sufficient saturated magnetization. Thus, Pd/La1-xPbxMnO3 (x=0.4-0.5) may be suitable for operation in the magnetically stabilized bed reactor.

关键词: diphenyl carbonate, perovskite-type oxides, magnetic catalyst, magnetically stabilized bed reactor