典型文献
Framework Zr Stabilized PtSn/Zr-MCM-41 as a Promising Catalyst for Non-oxidative Ethane Dehydrogenation
文献摘要：
Non-oxidative ethane dehydrogenation is a promising route to produce ethene.Herein,PtSn supported catalysts were investigated to achieve better ethane dehydrogenation performance by introduction of different Zr promoters,i.e.,framework Zr and ZrO2,to mesoporous MCM-41.In-situ XRD,TEM and CO chemisorption show that aggregation of metal particles and phase segregation of Pt3Sn to Pt and PtSn3 at high temperature occur for PtSn/M,leading to bad ethane dehydrogenation activity.Strong interaction be-tween ZrO2 and PtSn species,as proved by XPS,results in restrained metal particles,which promotes the initial reactivity.However,Pt phase generated on surface is disadvantageous for the desorption of produced ethene as indicated by CO-IR and C3H6-TPD,and pyridine-IR and NH3-TPD indicate strong acidity generated.Both deactivate the catalyst rapidly by deep dehydrogenation and coking.Moderate interaction between PtSn species and Si-O-Zr with much weaker acidity is formed when framework Zr is incorporated into MCM-41,which benefits the dispersion of metal particles,formation of Pt3Sn/Pt species and stabilization of metal species from phase segregation.Outstanding initial ethane conversion and ethene selectivity of ca.99％were achieved for the optimal PtSn/ZrM,which is more coking-tolerant and stable by generating graphitic carbon mainly on support instead of active metals.
文献关键词：
中图分类号：
作者姓名：
Jisheng Xu;Chengxiang Shi;Shuguang Zhang;Qiancheng Zheng;Lun Pan;Xiangwen Zhang;Ji-Jun Zou
作者机构：
Key Laboratory for Green Chemical Technology of the Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;Collaborative Innovative Center of Chemical Science and Engineering(Tianjin),Tianjin 300072,China;Zhejiang Institute of Tianjin University,Ningbo,Zhejiang,315201,China
文献出处：
引用格式：
[1]Jisheng Xu;Chengxiang Shi;Shuguang Zhang;Qiancheng Zheng;Lun Pan;Xiangwen Zhang;Ji-Jun Zou-.Framework Zr Stabilized PtSn/Zr-MCM-41 as a Promising Catalyst for Non-oxidative Ethane Dehydrogenation)[J].中国化学（英文版）,2022(08):918-924
A类：
Pt3Sn,PtSn3,ZrM
B类：
Framework,Stabilized,MCM,Promising,Catalyst,Non,oxidative,Ethane,Dehydrogenation,ethane,dehydrogenation,promising,route,ethene,Herein,supported,catalysts,were,investigated,better,performance,by,introduction,different,promoters,framework,ZrO2,mesoporous,In,situ,TEM,chemisorption,show,that,aggregation,particles,phase,segregation,high,temperature,occur,leading,bad,Strong,interaction,species,proved,XPS,results,restrained,which,promotes,initial,reactivity,However,generated,surface,disadvantageous,desorption,produced,indicated,C3H6,TPD,pyridine,NH3,strong,acidity,Both,deactivate,rapidly,deep,coking,Moderate,between,Si,much,weaker,formed,when,incorporated,into,benefits,dispersion,formation,stabilization,from,Outstanding,conversion,selectivity,achieved,optimal,more,tolerant,stable,generating,graphitic,carbon,mainly,instead,active,metals
AB值：
0.509911
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