摘要
制备了3种磷酸盐(MPO4,M=Al,Zr,Ca)载体,并在其上负载0.6%~6.0%的V2O5.活性评价结果表明,负载型V2O5/MPO4催化剂在丙烷氧化脱氢反应中具有良好的催化性能.丙烯选择性按V2O5/Ca3(PO4)2>V2O5/Zr3(PO4)4>V2O5/AlPO4顺序降低,这与载体的碱性强弱顺序变化一致.载体的性质和钒的负载量影响催化剂的氧化还原性能.ESR结果表明,V4+离子能可逆存在于催化剂中。
The supports of MPO\-4(M=Al, Zr, Ca) were prepared and 0.6% ̄60%V\-2O\-5 was supported on them. The catalysts are effective in the oxidative dehydrogenation of propane. The selectivity of C\-3H\-6 over the catalysts decreases in the order of V\-2O\-5/Ca\-3(PO\-4)\-2>V\-2O\-5/Zr\-3(PO\-4)\-4>V\-2O\-5/AlPO\-4, which followed the same trend of the basicity of the supports. The properties of the supports and the amount of loading had an effect on the redox property and the catalytic behavior of the catalysts. The ESR results indicated that the redox couple of V\+\{5+\}/V\+\{4+\} responded to the activity of oxidative dehydrogenation for propane.\=
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第4期608-611,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
丙烷
氧化脱氢
负载型
钒基
催化剂
丙烯
脱氢
Propane, Oxidative dehydrogenation, Supported vanadium\|based catalyst