Structure, characterization, and dynamic performance of a wet air oxidation catalyst Cu-Fe-La/α-Al2O3

摘要/Abstract

摘要： A Cu-Fe-La/γ-Al₂O₃ (CFLA) catalyst was prepared by the excessive impregnation method and characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The results indicate that the catalyst contained mostly Cu²⁺, Fe³⁺, and La³⁺ and a small amount of Cu⁺, Fe²⁺, and La. The active components were uniformly distributed in the catalyst, and the particle size of the components was approximately 7.5 nm. The CFLA catalyst was used for the treatment of methyl orange (MO) solution by catalytic wet air oxidation (CWAO), and it exhibited a high catalytic activity. The catalytic reaction involved variable valence states of metals and free-radical reaction mechanism. The CWAO reaction of MO solution was fitted by a segmented first-order dynamic model, and the rapid reaction apparent activation energy was 13.9 kJ·mol^-1.

关键词: Catalytic wet air oxidation, Catalyst, Activity, Reaction mechanism, Kinetics, Waste water

Abstract: A Cu-Fe-La/γ-Al₂O₃ (CFLA) catalyst was prepared by the excessive impregnation method and characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The results indicate that the catalyst contained mostly Cu²⁺, Fe³⁺, and La³⁺ and a small amount of Cu⁺, Fe²⁺, and La. The active components were uniformly distributed in the catalyst, and the particle size of the components was approximately 7.5 nm. The CFLA catalyst was used for the treatment of methyl orange (MO) solution by catalytic wet air oxidation (CWAO), and it exhibited a high catalytic activity. The catalytic reaction involved variable valence states of metals and free-radical reaction mechanism. The CWAO reaction of MO solution was fitted by a segmented first-order dynamic model, and the rapid reaction apparent activation energy was 13.9 kJ·mol^-1.

Key words: Catalytic wet air oxidation, Catalyst, Activity, Reaction mechanism, Kinetics, Waste water

中图分类号:

10.1016/j.cjche.2016.02.007

Yongli Zhang, Feng Peng, Yanbo Zhou. Structure, characterization, and dynamic performance of a wet air oxidation catalyst Cu-Fe-La/α-Al₂O₃[J]. , 2016, 24(9): 1171-1177.

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Structure, characterization, and dynamic performance of a wet air oxidation catalyst Cu-Fe-La/α-Al₂O₃

Structure, characterization, and dynamic performance of a wet air oxidation catalyst Cu-Fe-La/α-Al₂O₃

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