Effect of Preparation Method of Co9Fe3Bi1Mo12O51 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

Co9Fe3Bi1Mo12O51 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. Co9Fe3Bi1Mo12O51–SG catalyst prepared by a citric acid-derived sol–gel method exhibited a higher yield for 1,3-butadiene than Co9Fe3Bi1Mo12O51–CP catalyst prepared by a co-precipitation method. It was revealed that the Co9Fe3Bi1Mo12O51–SG catalyst retained abundant oxygen species for the reaction and sufficient adsorption sites for n-butene compared to the Co9Fe3Bi1Mo12O51–CP catalyst, leading to an enhanced catalytic performance of Co9Fe3Bi1Mo12O51–SG in the oxidative dehydrogenation of n-butene.