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Citation: Zhang Xuewen, Yu Shouming, Tan Jian, Lin Peiyan. SINTERING RESISTENT OF MULTIOXIDE CATALYST La-Cu-Fe-O/γ-Al₂O₃[J]. Chinese Journal of Applied Chemistry, ;1992, 9(4): 107-110. shu

SINTERING RESISTENT OF MULTIOXIDE CATALYST La-Cu-Fe-O/γ-Al₂O₃

1.
Department of Modern Chemistry and Structure Research Laboratory, University of Science and Technology of China, Hefei 230026

Corresponding author: Lin Peiyan,
Received Date: 6 August 1991
Available Online: 2 March 1992
Fund Project:

The effects of thermal treatment on Cu-O/Al₂O₃, Fe-O/Al₂O₃, Cu-Fe-O/Al₂O₃ and La-Cu-Fe-O/Al₂O₃ at 750~1050℃ are studied. The changes in BET surface, average particle size in relation to the interaction between Al₂O₃ and active components are elucidated. It is found that both phase transition of γ-Al₂O₃ to α-Al₂O₃ and sintering of active components cccurred on two samples containing ferric oxides at 850℃. Such a phase transition occurred only until 950℃ for Cu-O/Al₂O₃. The effects on the reduction of phase transition temperature of γ-Al₂O₃ follow Cu-Fe > Fe > Cu. La₂O₃ raises phase transition temperature of γ-Al₂O₃ to α-Al₂O₃ and resistence sintering of active components. As detected by XRD the thermal stable LaAlO₃ is formed at 850℃. LaAlO₃ may highly disperse into the active components retarding migration and agglomeration of active components at high temperature.
- aluminium oxide,
- lanthanum oxide,
- iron oxide,
- copper oxide,
- sintering phase transition,
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SINTERING RESISTENT OF MULTIOXIDE CATALYST La-Cu-Fe-O/γ-Al2O3

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通讯作者: 陈斌, bchen63@163.com

SINTERING RESISTENT OF MULTIOXIDE CATALYST La-Cu-Fe-O/γ-Al₂O₃