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Citation: Li Shufang, Yu Zuolong, Li Guijia, Xie Xiaofan. STUDY ON THE DEACTIVATION MECHANISM OF Fe-Sb-W OXIDES CATALYST BY ESR[J]. Chinese Journal of Applied Chemistry, ;1986, 3(4): 26-29. shu

STUDY ON THE DEACTIVATION MECHANISM OF Fe-Sb-W OXIDES CATALYST BY ESR

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Received Date: 25 April 1985
Available Online: 10 September 1985

The deactivation mechanism of Fe-Sb-W oxides catalyst for ammoxidation of propylene has been studied by ESR.The amount of coke deposited on the surface of catalyst and the changes of structure of the catalyst were determined simultaneously. It was shown that the reaction FeSbO₄+e→α-Fe₂O₃+Sb₂O₃ took place when the amount of deposited coke exceeded a certain limit and the active structure in the surface of the catalyst was deteriorated.The catalyst was then deactivated seriously,the conversion of propylene and yield of acrylonitrile were only 40% and 9% respectively, while themain product was CO₂.
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