Effect of Preparation Method of Co9Fe3Bi1Mo_(12)O_(51) on the Catalytic Performance in the Oxidative Dehydrogenation of n-Butene to 1,3-Butadiene-Comparison Between Co-Precipitation Method and Citric Acid-Derived Sol-Gel Method

摘要

Co9Fe3Bi1Mo_(12)O_(51)catalysts were prepared by two different methods,and were applied to the oxidative dehydrogenation of n-butene to 1,3-butadiene in a continuous flow fixed-bed reactor.Co9Fe3Bi1Mo_(12)O_(51)-SG catalyst prepared by a citric acid-derived sol-gel method exhibited a higher yield for 1,3-butadiene than Co9Fe3,Bi1Mo_(12)O_(51)CP catalyst prepared by a co-precipitation method.It was revealed that the Co9Fe3Bi1Mo_(12)O_(51)-SG catalyst retained abundant oxygen species for the reaction and sufficient adsorption sites for w-butene compared to the Co9Fe3Bi1Mo_(12)O_(51)-CP catalyst,leading to an enhanced catalytic performance of Co9Fe3Bi1Mo_(12)O_(51)-SG in the oxidative dehydrogenation of n-butene.