燃料化学学报（中英文）2023，Vol.51Issue(5)：616-624,9.DOI:10.1016/S1872-5813(23)60336-6
Pt基催化剂在富丙烯气氛中选择性氢气氧化性能和结构演变规律
The performances and structure evolution of Pt-based catalysts for selective hydrogen combustion under propene-rich conditions
摘要
Abstract
In the present study, the kinetic behaviour and active sites evolution processes of Pt-based catalysts were investigated. It was found that highly selective hydrogen combustion could be achieved over Sn modified Pt-based catalysts in presence of both propane and propene (over 98％). The stability tests, kinetic study and catalyst characterization revealed that the existence of oxygenated species is the reason for accelerated coking reactions. The formation of graphitized cokes serving as additional unselective active sites and the oxidation of tin in PtSn alloy phases are the primary reasons causing the catalytic selectivity loss during long-run tests under propene-rich condition.关键词
丙烷脱氢/选择性氢气氧化/Pt基催化剂/活性相演变Key words
propane dehydrogenation/selective hydrogen combustion/Pt-based catalyst/active phases evolution分类
化学化工引用本文复制引用
孙怀禄,李开欣,于文龙,丁军委,单玉领..Pt基催化剂在富丙烯气氛中选择性氢气氧化性能和结构演变规律[J].燃料化学学报（中英文）,2023,51(5):616-624,9.基金项目
The project was supported by the National Natural Science Foundation of China(22108144)and Natural Science Foundation of Shandong Province(ZR2021MB014). （22108144）
