引用本文:
郑玉珍, 杨天荣, 于作龙, 赵景林, 蔡鹤权, 赵清越. 含铈多元氧化物的活性结构及在丙烯氨氧化中的作用[J]. 应用化学,
1988, 5(2): 13-17.
Citation: Zheng Yuzhen, Yang Tianrong, Yu Zuolong, Zhao Jinglin, Cai Hequan, Zhao Qingyue. THE STRUCTURE OF ACTIVE PHASES OF CERIUM-CONTAINING MULTICOMPONENT OXIDE AND ITS CATALYTIC BEHAVIOUR FOR AMMOXIDATION OF PROPYLENE[J]. Chinese Journal of Applied Chemistry, 1988, 5(2): 13-17.
Citation: Zheng Yuzhen, Yang Tianrong, Yu Zuolong, Zhao Jinglin, Cai Hequan, Zhao Qingyue. THE STRUCTURE OF ACTIVE PHASES OF CERIUM-CONTAINING MULTICOMPONENT OXIDE AND ITS CATALYTIC BEHAVIOUR FOR AMMOXIDATION OF PROPYLENE[J]. Chinese Journal of Applied Chemistry, 1988, 5(2): 13-17.
含铈多元氧化物的活性结构及在丙烯氨氧化中的作用
English
THE STRUCTURE OF ACTIVE PHASES OF CERIUM-CONTAINING MULTICOMPONENT OXIDE AND ITS CATALYTIC BEHAVIOUR FOR AMMOXIDATION OF PROPYLENE
Abstract:
The effect of rare earth cation Ce3+ on the catalytic behaviour of multicomponent oxides consisted of PMo12Bi3Fe8-xCex K0.1Oy(x=0-8) for ammoxidation of propylenc has been investigated in a fluidized bed reactor. The structure of the catalyst was characterized by XRD, IR, SEM and TG techniques. It is found that the highest yield of aerylonitrile could be obtained at x=2-3, with Fe2(MoO4)3, Ce2(MoO4)3 and α-Bi2Oε·3MoO3 being coexisted in the catalyst. The dissolution and coagulation of the above three phases in the solid solution and the formation of a Pseudohomogeneous phase make the active component uniformly distributed at the surface and boundaries of the phases. The activity of the catalysts is considered mainly caused by synergistic effect of the individual active components. Cerium inhibits the sublimation of MoO3, stabilizing the structure, of active phases.
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Key words:
- Propylene
- / Ammoxidation
- / Heterogeneous catalysis
- / Acrylonitrile
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