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.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
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)
