负载型钙钛矿La_(0.8)Sr_(0.2)MnO_3/SBA-15催化燃烧甲苯的研究  

Research on the supported perovskite La_(0.8)Sr_(0.2)MnO_3/SBA-15 catalyst for toluene combustion

作　　者：任倩茹[1] 张泽凯[1] 徐彪[1] 陈银飞[1] 

机构地区：[1]浙江工业大学化学工程与材料学院工业催化学科催化反应工程研究所,浙江杭州310014

出　　处：《燃料化学学报》2012年第9期1142-1146,共5页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(20903080)

摘　　要：采用逐层负载-孔道内氨/水蒸气原位羟化法制备了一系列负载型钙钛矿La0.8Sr0.2MnO3/SBA-15催化剂,用XRD、BET、TG-DTG、XPS、H2-TPR等手段对催化剂的物性结构等进行了表征,并在常压连续流动固定床反应器上评价了该催化剂对甲苯催化燃烧的催化性能。结果表明,逐层负载-孔道内氨/水蒸气原位羟化法的使用有助于活性组分La0.8Sr0.2MnO3进入SBA-15的孔道,并在SBA-15上形成钙钛矿结构。La0.8Sr0.2MnO3/SBA-15上钙钛矿结构的形成和晶格氧的出现,可为催化剂提供较多的活性中心,有利于其催化燃烧甲苯的活性。A series of supported perovskites La0.8Sr0.2MnO3/SBA-15 catalysts were prepared by step coating NH3/water vapor-induced internal hydrolysis method,and characterized by XRD,BET,TG-DTG,XPS and H2-TPR.Their catalytic performances for toluene combustion were evaluated on a continuous-flow fixed-bed reactor.The results showed that step coating NH3/water vapor-induced internal hydrolysis method is favorable for the entrance of La0.8Sr0.2MnO3 into pore structure of SBA-15,and the formation of perovskites phase.The formation of perovskites crystal and lattice oxygen can provide more active sites,promote the catalytic activity of toluene combustion.

关 键 词：钙钛矿 LA0.8SR0.2MNO3 SBA-15 甲苯 孔道内氨/水蒸气原位羟化法 

分 类 号：O643.36[理学—物理化学]