首页|Thermal stable Pt clusters anchored by K/TiO2-Al2O3 for efficient cycloalkane dehydrogenation
Thermal stable Pt clusters anchored by K/TiO2-Al2O3 for efficient cycloalkane dehydrogenation
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
万方数据
Catalytic dehydrogenation of cycloalkanes is considered a valuable endothermic process for alleviating the thermal barrier issue of hypersonic vehicles.However,conventional Pt-based catalysts often face the severe problem of metal sintering under high-temperature conditions.Herein,we develop an efficient K2CO3-modified Pt/TiO2-Al2O3(K-Pt/TA)for cycloalkane dehydrogenation.The optimized K-Pt/TA showed a high specific activity above 27.9 mol mol-1·s-1(H2/Pt),with toluene selectivity above 90.0％at 600 ℃ with a high weight hourly space velocity of 266.4 h-1.The introduction of alkali metal ions could generate titanate layers after high-temperature hydrogen reduction treatment,which promotes the generation of oxygen vacancy defects to anchored Pt clusters.In addition,the titanate layers could weaken the surface acidity of catalysts and inhibit side reactions,including pyrolysis,polymerization,and isomerization reactions.Thus,this work provides a modification method to develop efficient and stable dehydrogenation catalysts under high-temperature conditions.
Key Laboratory for Green Chemical Technology of the Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China
Zhejiang Institute of Tianjin University,Ningbo 315201,China
NETL
NSTL
万方数据
