Effect of Oxygen Capacity and Oxygen Mobility of Pure Bismuth Molybdate and Multicomponent Bismuth Molybdate on their Catalytic Performance in the Oxidative Dehydrogenation of n-Butene to 1,3-Butadiene

详细信息    查看全文

• 作者：Ji Chul Jung ; Howon Lee ; Heesoo Kim ; Young-Min Chung ; Tae Jin Kim ; Seong Jun Lee ; Seung-Hoon Oh ; Yong Seung Kim and In Kyu Song
• 关键词：Pure bismuth molybdate ; Multicomponent bismuth molybdate ; Oxygen mobility ; Oxidative dehydrogenation ; n ; Butene
• 刊名：Catalysis Letters
• 出版年：2008
• 出版时间：August, 2008
• 年：2008
• 卷：124
• 期：3-4
• 页码：262-267
• 全文大小：336.0 KB

文摘

Pure bismuth molybdate (γ-Bi₂MoO₆) and multicomponent bismuth molybdate (Co₉Fe₃Bi₁Mo₁₂O₅₁) catalysts were prepared by a co-precipitation method, and were applied to the oxidative dehydrogenation of n-butene to 1,3-butadiene. The Co₉Fe₃Bi₁Mo₁₂O₅₁ catalyst showed a better catalytic performance than the γ-Bi₂MoO₆ catalyst in terms of conversion of n-butene and yield for 1,3-butadiene, indicating that the multicomponent bismuth molybdate was more efficient than the pure bismuth molybdate in the oxidative dehydrogenation of n-butene. It was revealed that the crucial factor determining the catalytic performance of Bi–Mo-based catalyst in the oxidative dehydrogenation of n-butene is not the amount of oxygen in the catalyst involved in the reaction (oxygen capacity) but the intrinsic mobility of oxygen in the catalyst involved in the reaction (oxygen mobility). The enhanced catalytic performance of Co₉Fe₃Bi₁Mo₁₂O₅₁ was due to its facile oxygen mobility.