HCl存在下CeO2基催化剂上乙烷氧化脱氢制乙烯

报道了一种HCl存在时温和条件下的乙烷氧化脱氢制乙烯催化转化新途径.研究发现,在多种金属氧化物催化剂中,CeO2呈现最佳乙烯生成的催化性能.与纳米粒子相比,具有棒状和立方体状形貌的CeO2纳米晶具有较高的乙烷转化率和乙烯选择性.以MnOx修饰CeO2可进一步提高催化性能.在8 wt%MnOx-CeO2催化剂上,723 K反应2 h时乙烷转化率和乙烯选择性分别为94%和69%.该催化剂性能稳定,反应100 h乙烯收率可保持在65%–70%.HCl的存在对乙烯的选择性生成起着至关重要的作用,一部分乙烯来自于氯乙烷的脱HCl反应....

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Bibliographic Details
Published in催化学报 Vol. 35; no. 8; pp. 1260 - 1266
Main Author 郁风驰 吴雪娇 张庆红 王野
Format Journal Article
LanguageChinese
Published 厦门大学化学化工学院，能源材料化学协同创新中心，固体表面物理化学国家重点实验室，醇醚酯化工清洁生产国家工程实验室，福建厦门361005 2014
Subjects
乙烯
乙烷
二氧化铈
氧化脱氢
氯化氢
氧化脱氢
Oxidative dehydrogenation
乙烷
Ethylene
二氧化铈
氯化氢
Hydrogen chloride
Cerium oxide
Ethane
乙烯
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Summary:报道了一种HCl存在时温和条件下的乙烷氧化脱氢制乙烯催化转化新途径.研究发现,在多种金属氧化物催化剂中,CeO2呈现最佳乙烯生成的催化性能.与纳米粒子相比,具有棒状和立方体状形貌的CeO2纳米晶具有较高的乙烷转化率和乙烯选择性.以MnOx修饰CeO2可进一步提高催化性能.在8 wt%MnOx-CeO2催化剂上,723 K反应2 h时乙烷转化率和乙烯选择性分别为94%和69%.该催化剂性能稳定,反应100 h乙烯收率可保持在65%–70%.HCl的存在对乙烯的选择性生成起着至关重要的作用,一部分乙烯来自于氯乙烷的脱HCl反应.
Bibliography:Fengchi Yu,Xuejiao Wu,Qinghong Zhang,Ye Wang（State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China）
This article reports a new catalytic route for the oxidative dehydrogenation of ethane to ethylene in the presence of HCl at moderate temperatures. CeO2 was found to be the most efficient catalyst for the production of ethylene from the variety of metal oxides examined in this work. CeO2 nanocrys‐tals with rod and cube morphologies showed higher ethane conversions and ethylene selectivities than CeO2 nanoparticles. The modification of CeO2 by MnOx further enhanced the catalytic perfor‐mance. Ethane conversion of 94% and ethylene selectivity of 69% were obtained after 2 h of reac‐tion at 723 K over an 8 wt% MnOx-CeO2 catalyst. This catalyst was stable a
ISSN:0253-9837
1872-2067
DOI:10.1016/S1872-2067(14)60152-2