WO_3/Al_2O_3-TiO_2催化剂的制备及其在甘油气相脱水制备丙烯醛中的应用  

Preparation of WO_3/Al_2 O_3-TiO_2 and Their Application in Gas Phase Dehydration of Glycerol into Acrolein

作　　者：刘涛[1,2] 王奂祎[1,2] 贺站锋[1,2] 王丹[1,2] 蒋毅[1] 

机构地区：[1]中国科学院成都有机化学研究所,四川成都610041 [2]中国科学院大学,北京100049

出　　处：《合成化学》2013年第4期410-414,419,共6页Chinese Journal of Synthetic Chemistry

基　　金：国家自然科学基金资助项目(21172024)

摘　　要：采用等体积浸渍法制备了系列WO3/Al2O3-TiO2催化剂(CatwT),其结构和性能经XRD,TG,N2-BET和NH3-TPD表征。以甘油气相脱水制备丙烯醛为探针反应,考察了CatwT的催化活性。结果表明,WO3负载量为20%(w=20%),于500℃焙烧4 h制得的催化剂Cat25000具有最佳的催化活性,甘油转化率和丙烯醛选择性分别为100%和82.2%;CatwT的催化性能与其表面积、总酸量具有很好的相关性,WO3促进了总酸量增加,WO3晶相为催化剂活性相。A series of WO3/Al2O3-TiO2 catalysts（CatwT） were prepared by equal volume impregnation method.The structures and properties were characterized by TG,XRD,N2-BET and NH3-TPD.Catalytic activities of CatwT were investigated by gas phase dehydration of glycerol into acrolein.The results showed that Cat20500（WO3-loading is 20 wt%,and calcination temperature is 500 ℃） exhibited best catalytic activity with 100% conversion of glycerol and 82.2% acrolein selectivity.Catalytic activities of CatwT correlated with the BET surface area and the total amount of acid,and the WO3 phase may be the active phase of catalysts.

关 键 词：三氧化钨 三氧化铝 甘油 丙烯醛 制备 催化活性 

分 类 号：O612.3[理学—无机化学] O614.61[理学—化学]