文献类型：期刊文献

英文题名：Palladium-doped sulfated zirconia: Deactivation behavior in isomerization of n-hexane

作者：Liu, Naiwang[1];Ma, Zhiming[1];Wang, Sitan[1];Shi, Li[1];Hu, Xiude[2];Meng, Xuan[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Ningxia Univ, State Key Lab Highefficiency Utilizat Coal & Gree, Yinchuan 750021, Peoples R China

年份：2020

卷号：262

外文期刊名：FUEL

收录：;EI(收录号：20194907776556);WOS:【SCI-EXPANDED(收录号:WOS:000500166500107)】；

基金：We are so grateful and want to extend our sincere appreciations for the financial support from Science and Technology Commission of Shanghai Municipality (Sailing Program 18YF1406300), National Natural Science Foundation of China (No. 21808054), China Postdoctoral Science Foundation (No. 2017M621389).

语种：英文

外文关键词：Sulfated zirconia; Deactivation; Regeneration; Isomerization

摘要：The deactivation and regeneration behaviors of palladium doped sulfated zirconia was studied in the n-hexane isomerization. Results indicated that sulfate reduction is the major catalyst deactivation reason. Sulfate leakage also contributed to the deactivation but not the predominant cause. Since the appearance of hydrogen, the amount of carbon deposition is very low, and it plays a positive role in the reaction: covering part of high active sites, avoiding cracking. Reduced sulfite can be re-oxidized into sulfate under high temperature at the atmosphere of air, but accompanied by the gasification loss of sulfate and carbon deposition. Although the effect of nitrogen on oxidizing sulfites is not as good as air, nitrogen can inhibit the gasification loss of sulfate and carbon deposition, and finally the catalyst regenerated under nitrogen at 400 degrees C reflects superior performance even than fresh catalyst.