Pd/ZrO_2-Al_2O_3催化剂的甲烷催化燃烧性能  

Pd /ZrO_2-Al_2O_3 Catalysts for Total Combustion of Methane

作　　者：何湘鄂[1] 杨乐夫[1] 史春开[1] 胡昱翔[1] 蔡俊修[1] 

机构地区：[1]厦门大学化学系

出　　处：《厦门大学学报（自然科学版）》2003年第4期471-474,共4页Journal of Xiamen University：Natural Science

基　　金：科技部973项目(G1999022400);国家自然科学基金(20203014)

摘　　要：用共沉淀法制备不同摩尔配比的ZrO_2和Al_2O_3混合载体,负载贵金属Pd后,对该催化剂系列进行甲烷燃烧反应的活性表征。利用XRD,BET,BJH孔分布,CO脉冲吸附Pd分散度测定法等技术考察了ZrO_2和Al_2O_3不同配比对混合载体的结构和催化剂性能的影响。结果表明,ZrO_2和Al_2O_3的摩尔比为1:5.8的负载Pd催化剂活性最好,载体中单斜晶相氧化锆和较大孔径分布的催化剂都有助于催化剂活性的改善。A series of mixed oxide supports (ZrO2-Al2O3) were prepared by coprecipitation method, and the supported palladium catalysts were investigated for the low-temperature catalytic combustion of methane. The catalytic activity depends on the composition of the compositive oxide support. XRD analysis indicated that ZrO2 with monoclinic phase enhanced the catalytic activity. And the pore size is also important to the activity of catalyst. Owing to the larger pore diameter, Pd/ZrO2-5. 8Al2O3 showed a higher catalytic activity for methane combustion.

关 键 词：Pd/ZrO2-A12O3催化剂 负载型钯催化剂 甲烷 催化燃烧性能 物相 孔结构 催化活性 

分 类 号：O643.361[理学—物理化学]