文献类型：期刊文献

英文题名：Coke Formation on Pt-Sn/Al2O3 Catalyst for Propane Dehydrogenation

作者：Wang, Hai-Zhi[1];Sun, Li-Li[1];Sui, Zhi-Jun[1];Zhu, Yi-An[1];Ye, Guang-Hua[1];Chen, De[2];Zhou, Xing-Gui[1];Yuan, Wei-Kang[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

年份：2018

卷号：57

期号：26

起止页码：8647

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20182505352367);WOS:【SCI-EXPANDED(收录号:WOS:000438310800002)】；

基金：This work was financially supported by National Natural Science Foundation of China (NSFC, 91645122) and China Postdoctoral Science Foundation (2016M600289).

语种：英文

外文关键词：Propane - Dehydrogenation - Catalyst deactivation - Metal analysis - Thermogravimetric analysis - High resolution transmission electron microscopy

摘要：Catalyst deactivation by coking is one major problem for propane dehydrogenation (PDH). To develop catalysts with high resistance to coke, the analysis of coke becomes essential. In this work, an analysis procedure is proposed and validated to acquire the detailed locations and compositions of the coke formed on an assynthesized Pt-Sn/Al2O3 catalyst. This procedure combines highresolution transmission electron microscopy (HRTEM), FT-IR, Raman, thermogravimetric analysis (TG), and pyrolysis GC-MS; with this procedure, the systematic and quantitative analysis of coke can be achieved. The results show that the coke is located on the metal, in the vicinity of the metal, and on the support. Besides, aliphatics, aromatics, and pregraphite cokes are identified, and they account for 69.0, 4.4, and 26.6 wt %, respectively. Finally, an in situ DRIFT study is performed, and the results show that the aliphatic coke can be transformed into the aromatic coke and this transformation is related to the deep dehydrogenation reactions.