用磁性催化剂 Pd/La_(1-x)Pb_xMnO_3(x=0.2~0.6)合成碳酸二苯酯(英文)

• 作 者: 鲁威 杜治平 袁华 田琦峰 吴元欣
• 机 构: Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology,
• 出 处: Chinese Journal of Chemical Engineering
• 发表日期: 2013年01期
• 关键词: 碳酸二苯酯 Pd/La x)Pb_xMnO_3 x=0.2~0.6 magnetometer magnetization perovskite carbonat

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 tem-perature-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 vacan-cies, larger amount and better mobility of lattice oxygen of their support. Furthermore, these samples possess suffi-cient saturated magnetization. Thus, Pd/La1-xPbxMnO3 (x=0.4-0.5) may be suitable for operation in the magneti-cally stabilized bed reactor.

The compounded catalysts were characterized by the X-ray diffraction (XRD), surface area (x = 0.2-0.7) were prepared and used for the oxidative carbonylation of phenol to diphenyl carbonate. The experimental results of the magnetic Pd / La1-xPbxMnO3 (x = 0.4-0.5) give relative better catalytic activity. It can be explained by Thus, Pd / La1-xPbxMnO3 (x = 0.4-0.5) may be suitable for operation in the magneti-cally stabilized bed reactor.