在机械混合的MgO-Mg3(VO4)2,Mg3(VO4)2-Mg2V2O7和V2O5-MgV2O6双相催化剂体系上,研究了晶相间协同催化效应对环己烷氧化脱氢反应性能的影响.催化剂表征和反应结果表明,双晶相间协同效应或源于不同晶相间形成的内聚界面,或遵从溢流氧的遥控机理,或产生于其中一个晶相完全包覆整个催化剂表面.当在Mg3(VO4)2上进行环己烷氧化脱氢反应时,可加入适量MgO或Mg2V2O7以提高其催化性能.在80%Mg3(VO4)2-20%Mg2V2O7催化剂上,当环己烷转化率为15.5%时,环己烯选择性达44.9%.
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