稀有金属氧化物对钼-铋催化剂性能的影响  

Effect of Rare Metal Oxides on Catalytic Performance of MoO_3-Bi_2O_3 Catalysts

作　　者：韩占刚[1] 李铭岫[1] 王继业[1] 杨述韬[1] 

机构地区：[1]河北师范大学化学学院,河北石家庄050091

出　　处：《稀有金属》2004年第4期780-782,共3页Chinese Journal of Rare Metals

基　　金：河北省科学技术厅 (0 0 2 13 0 10 3D);河北省自然科学基金 (2 0 0 15 1)资助项目

摘　　要：制备了一系列添加稀有金属氧化物MxOy(M =Zr ,Nb ,Pr,Sm ,Tb ,Yb)的钼 铋催化剂。研究了反应温度、异丁烯在原料气中的浓度、稀有金属在催化剂中的比例、稀有金属的种类对催化剂活性的影响 ,找出了最佳反应条件。用XRD等方法对催化剂进行了表征。实验证明 ,添加稀有金属氧化物显著提高了催化剂的活性及甲基丙烯醛的选择性。在含有稀有金属氧化物的钼 铋催化剂中 ,物种之间存在着强烈的协同作用 。MoO 3 Bi 2O 3 catalysts doped several rare metals were prepared and characterized by XRD and other technique. Effects of reaction temperature, concentration of isobutene in reaction gases, different x and rare metals oxides on catalytic performance of Mo Bi O catalysts were studied. The conversion of isobutene and the selectivity to methacrolein were improved observably by adding rare metals to the Mo Bi O catalyst, and the optimal reaction conditions were found. A strong synergy existed between the different components of MoO 3 Bi 2O 3 catalysts, which may be the main reason that catalytic performance is improved obviously.

关 键 词：稀有金属氧化物 钼-铋催化剂 异丁烯 甲基丙烯醛 

分 类 号：O643[理学—物理化学]