铈锰复合氧化物高效催化分解臭氧  

Efficiently catalytic decomposition of ozone by cerium-manganese composite oxide

作　　者：刘思嘉 胡正 彭博 LIU Sijia;HU Zheng;PENG Bo(Sinopec Catalyst Co.,Ltd.Shanghai Division,Shanghai 201507,China;Guangxi Key Laboratory of Polysaccharide Materials and Modification,Key Laboratory of Chemical and Biological Transforming Process of Guangxi Higher Education Institutes,School of Chemistry and Chemical Engineering,Guangxi Minzu University,Nanning 530008,China)

机构地区：[1]中国石化催化剂有限公司上海分公司,上海201507 [2]广西民族大学化学化工学院广西多糖材料与改性重点实验室广西高校化学与生物转化过程新技术重点实验室,广西南宁530008

出　　处：《石油化工》2024年第4期505-510,共6页Petrochemical Technology

基　　金：广西科技基地和人才专项资助(桂科AD21220068);中央引导地方科技发展资金专项(区域创新体系建设类:桂科ZY23055006)。

摘　　要：将Ce掺入MnO_(2)八面体分子筛(OMS-2)中得到铈锰氧化物催化剂。通过XRD,SEM,H_(2)-TPR,XPS等方法表征了催化剂的物理化学性质,模拟了该催化剂在高湿度下对高浓度臭氧的去除效果。实验结果表明,在OMS-2中掺Ce可使OMS-2晶型发生改变。Mn/Ce原子比为4的CeMn4的比表面积最大、粒径较小、氧空位浓度最高,因此具有优异的氧化还原性能,在湿度90%、体积空速700000 h^(-1)、反应时间420 min的条件下能实现臭氧分解率稳定在95%以上,且抗水性能强。铈锰复合氧化物有望成为工业上使用的催化分解臭氧的理想材料。The cerium-manganese oxide catalyst was prepared by dopping cerium into the manganese oxide octahedral molecular sieve(OMS-2).The physical and chemical properties of the catalyst were characterized by XRD,SEM,H_(2)-TPR,and XPS.The removal effect of the catalyst on high concentration ozone under high humidity was simulated.The experimental results demonstrate that the addition of Ce to OMS-2 induces a transformation in the crystal lattice structure of OMS-2.The CeMn4 with a Mn/Ce atomic ratio of 4 exhibits the highest specific surface area,the smallest particle size,and the highest concentration of oxygen vacancies,which contribute to its exceptional redox properties.Under the conditions of humidity 90%,volume space velocity 700000 h^(-1),and reaction time 420 min,a stable ozone decomposition rate exceeding 95%can be achieved,while also demonstrating strong water resistance.The cerium-manganese composite oxide is poised to become an ideal material for catalytic decomposition of ozone in industry.

关 键 词：臭氧分解 铈锰复合氧化物 高湿度 MnO_(2)八面体分子筛 

分 类 号：TQ426.82[化学工程]