摘要
以Al2O3/堇青石蜂窝陶瓷为载体,氧化锰八面体分子筛(OMS-2)为活性组分,采用涂覆法制备了系列整体式催化剂。考察了黏合剂种类和活性组分涂覆次数对二甲醚(DME)催化燃烧性能的影响,并对催化剂进行XRD、BET、SEM、H2-TPR、O2-TPD等表征。结果表明,以甲氧基聚乙二醇为黏合剂经一次涂覆制备的整体式催化剂的性能最佳,活性组分OMS-2以相互交织的簇体均匀分布在载体上,并与Al2O3之间存在较强的相互作用。涂层的添加有效增加了催化剂的比表面积,提高了催化剂的性能,最佳催化活性t90为257℃。
Monolithic catalysts for catalytic combustion of dimethyl ether（DME） were prepared by a dipcoating method using Al2O3/cordierite as support and manganese oxide octahedral molecular sieve（OMS-2） as active component.The effect of different types of organic polymer binder and the coating times of active component on the performance of DME combustion w ere investigated.The catalysts w ere characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,hydrogen temperature-programmed reduction（H 2 TPR） and oxygen temperature-programmed desorption（O2-TPD） techniques.The results show ed that the best catalyst w as the one using methoxy polyethylene glycol（MPEG） as the coating binder by one-time coating.The active component OMS-2 w as in a cluster form and homogeneously dispersed on the surface of the support because of the strong interaction betw een OMS-2 and Al2O3 coating.The Al2O3 coating could significantly improve the surface area of catalysts,and thus enhance the activity performance.The highest catalytic activity for DME combustion w ith a complete combustion temperature（t90） of 257 ℃ was obtained.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2013年第9期1115-1121,共7页
Journal of Fuel Chemistry and Technology
基金
广东省自然科学基金(10251009001000003
S2012010009680)
广东省科技计划项目(012A030600006)
广东省高等学校学科建设基金(cgzhzd1104)
关键词
氧化锰
整体式催化剂
二甲醚
催化燃烧
manganese oxide
monolithic catalyst
dimethyl ether
catalytic combustion
