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通过氧和丙烯在铁锑氧化物催化剂上吸附的研究,认为丙烯在铁锑氧化物催化剂上的氧化是在表面活性晶格氧参与下的还原-再氧化循环过程,弱结合的晶格氧的活性比强结合的高,优先参加反应。通过催化剂表面还原和再氧化速度的研究,并和钼系催化剂相比较,证明铁锑氧化物催化剂不仅易被还原,而且还原表面上的产物较难脱附,故认为在选择氧化反应中铁锑氧化物催化剂上的积炭可能是由表面还原引起的。
Through the study on the adsorption of oxygen and propylene on the iron-antimony oxide catalyst, it is considered that the oxidation of propylene on the iron-antimony oxide catalyst is a reduction-reoxidation cycle with the participation of the surface-active lattice oxygen. The weakly bound lattice oxygen Activity than strong combination of high priority to participate in the reaction. Through the study of catalyst surface reduction and reoxidation rate, and compared with the molybdenum-based catalyst, it is proved that the iron-antimony oxide catalyst is not only easily reduced, but also the product on the reduction surface is difficult to be desorbed. Therefore, it is considered that in the selective oxidation reaction, Coke deposition on the catalyst may be caused by surface reduction.