石油化工2024，Vol.53Issue(12)：1695-1703,9.DOI:10.3969/j.issn.1000-8144.2024.12.001
二氯乙烷氧氯化再生高分散Pt/Al2O3丙烷脱氢催化剂
Regeneration of highly dispersed Pt/Al2O3 catalyst for propane dehydrogenation by dichloroethane oxychlorination
摘要
Abstract
The highly dispersed Pt/Al2O3 catalyst for propane dehydrogenation was prepared,and the process of regenerating Pt-based catalysts by oxychlorination using dichloroethane as a chlorine dispersant was studied.The catalyst structure before and after oxychlorination treatment was characterized by XRD,CO chemical adsorption,HAADF-STEM,and N2 adsorption-desorption.The effects of temperature,dichloroethane feed rates,oxygen concentration,and oxychlorination time on the performance of the regenerated catalyst were investigated,and the stability of the catalyst during reaction-regeneration cycles was evaluated.The results indicate that Pt particles on the sintered Pt/Al2O3 catalyst can be redispersed to sub-nano scales by dichloroethane oxychlorination treatment.The conditions to reach the optimal catalytic performance are dichloroethane feed rates of 127 μmol/min,oxygen concentration of 12%(φ),temperature of 500℃,and oxycholorination time of 60 min.The performance of the Pt/Al2O3 catalyst in these conditions remains stable during multiple reaction-regeneration cycles.关键词
丙烷脱氢/Pt/Al2O3催化剂/二氯乙烷/再生/再分散Key words
propane dehydrogenation/Pt/Al2O3 catalyst/dichloroethane/regeneration/redispersion分类
化学化工引用本文复制引用
陶明亮,赵方成,隋志军,安霓虹,沈亚峰,周兴贵..二氯乙烷氧氯化再生高分散Pt/Al2O3丙烷脱氢催化剂[J].石油化工,2024,53(12):1695-1703,9.基金项目
国家自然科学基金项目(22278130) （22278130）
云南省科技厅项目(202305AF150194). （202305AF150194）
