摘要
采用脉冲微反应技术研究了一系列Pt-Ho催化剂催化甲基环戊烷及环己烷的重整反应,应用Faraday磁天平研究了催化剂的磁性,用氢氧滴定法测定了催化剂上铂的分散度与平均粒径.结果表明,钬能改善活性组分铂的分散度,降低铂的平均粒径,从而增加铂催化剂的活性中心数,提高了铂重整催化剂的活性,进而增强了铂催化剂的抗硫稳定性.Pt-Ho催化剂的活性与磁性有对应关系.
The conversion of methylcyclopentane (MCP) and cyclohexane on a series of platinum-holmium catalysts has been investigated using a pulsed catalytic flow micro-reactor. The magnetic properties of these catalysts are studied using a Faraday magnetic balance. H-2-O-2 titration was utilized to investigate the changes of platinum dispersion and platinum particles. The results show that, when the holmium content is low, holmium can improve the platinum dispersion and decrease the size of platinum particles, which increase the number of active centers of platinum catalysts. It is shown that holmium may improve the aromtization activity and anti-poison stability of platinum reforming catalysts. Moreover, there is a correlation between the activity and the magnetic susceptibility of the platinum-holmium catalyst, which indicates that the activity of Pt-Ho catalyst is related to the electronic factor of metal components.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2007年第1期63-66,共4页
Journal of Molecular Catalysis(China)
关键词
铂钬催化剂
改性
活性
磁性
Pt-Ho catalyst
Modification
Activity
Magnetism
