文献类型：期刊文献

英文题名：Study on quantitative structure of coke deposition in UDH catalyst for acetylene hydrochlorination

作者：Zhao, Jigang[1,2];Hu, Kang[1];Yuan, Xiangqian[1]

机构：[1]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Sch Chem Engn, Shanghai, Peoples R China

年份：2023

卷号：45

期号：2

起止页码：5458

外文期刊名：ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS

收录：;EI(收录号：20232114129023);WOS:【SCI-EXPANDED(收录号:WOS:000982710200001)】；

语种：英文

外文关键词：Acetylene hydrochlorination; average molecular structure; coke deposition; UDH catalyst

摘要：The catalyst made of Au, Cu and K according to a certain ratio which is defined as a UDH catalyst has a great catalytic effect on acetylene hydrochlorination. In order to clarify the formation mechanism of coke deposition in catalyst, the structure of coke deposition was quantified. Carbon deposits in the UDH catalyst are separated using Soxhlet extraction and rotary evaporation. Experimental techniques like gel chromatography, elemental analysis, H-NMR and FT-IR were applied for the characterization of coke deposition. The quantitative structure of the coke deposition was evaluated by the improved B-L method. The results show that the average molecular formula of the coke deposition is C40.82H33Cl15.55 which is a complex multiple-ring structure containing seven aromatic rings and five six-membered cycloalkane rings. The aromatic carbon fraction of the calculated coke deposition is 0.623, and the ratio of hydrogen to carbon atomic which are not replaced in aromatic ring moieties is 0.313. These results indicate that in the side reaction of acetylene hydrochlorination, substances with the ring structure are more likely to be generated, and the ring structure continues to increase, eventually forming coke deposition.