尖晶石型Mn_(1-x)M_xCo_2O_4柴油车尾气处理催化剂的制备及其应用  

Preparation and application of spinel-type Mn_(1-x)M_xCo_2O_4 catalyst for diesel exhaust treatment

作　　者：刘焕荣[1] 李炳章 张园园 阎子峰[2] 钱岭[2] Liu Huanrong;Li Bingzhang;Zhang Yuanyuan;Yah Zifeng;Qian Ling(School of Chemical Engineering,Sheng Li College,China University of Petroleum,Dongying 257061,Shandong,China;State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Qingdao 266555,Shandong,China)

机构地区：[1]中国石油大学胜利学院化学工程学院,山东东营257061 [2]中国石油大学(华东)重质油国家重点实验室,山东青岛266580

出　　处：《工业催化》2018年第11期84-87,共4页Industrial Catalysis

基　　金：国家级大学生创新创业训练计划项目(201813386052)

摘　　要：尖晶石型复合氧化物因具有独特的结构特征而成为相对理想的柴油车尾气处理催化剂。采用溶胶-凝胶法制备尖晶石型Mn_(1-x)M_xCo_2O_4催化剂,通过X射线衍射(XRD)和程序升温氧化(TDO)等对Mn_(1-x)M_xCo_2O_4催化剂进行表征。结果表明,制备的样品Mn_(1-x)M_xCo_2O_4均为尖晶石型复合氧化物;掺杂Cu、Ce后,催化剂的氧化性能有不同程度的变化。在固定床微型反应器上对催化剂催化活性进行评价,结果表明,与纯MnCo_2O_4相比,Mn_(0.9)Ce_(0.1)Co_2O_4催化剂催化活性提高,Mn_(0.9)Cu_(0.1)Co_2O_4催化剂催化活性降低,但CO_2选择性增加。Spinel-type composite oxides with unique structure became relatively ideal catalyst for diesel exhaust treatment. A series of Mn1-xMxCo2O4 spinel oxide catalysts were prepared by sol-gel method and characterized by X-ray diffraction and temperature programmed oxidation. The results showed that the as-prepared catalysts possessed spinel structures. After partial substitution of Mn with Cu and Ce,oxidizing properties of catalysts changed. The catalytic activity of catalysts was evaluated in fix-bed micro-reactor. The results showed compared to MnCo2O4,Mn0.9Ce0.1Co2O4 catalyst exhibited better catalytic activity for soot combustion,while catalytic activities of Mn0.9Cu0.1Co2O4 decreased but CO2 selectivity increased.

关 键 词：催化化学 溶胶-凝胶法 尖晶石型复合氧化物 Mn1-xMxCo2O4催化剂 柴油车尾气 碳烟颗粒物 

分 类 号：O643.36[理学—物理化学] TQ426.96[理学—化学]