文献类型：期刊文献

英文题名：Study of anti-coking property of SiO₂/S composite coatings deposited by atmospheric pressure chemical vapor deposition

作者：Zhou, Jianxin; Xu, Hong; Liu, Jinglei; Qi, Xuegui; Zhang, Li; Jiang, Zhiming

机构：[1]E China Univ Chem Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2007

卷号：61

期号：29

起止页码：5087

外文期刊名：MATERIALS LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000251097500003)】；

语种：英文

外文关键词：chemical vapor deposition; coatings; HP40 steel tube; coking

摘要：To alleviate catalytic coking on the inner surfaces of radiant tubes for ethylene production in petrochemical plants, SiO2/S composite coatings were prepared on the surface of HP40 steel tube using dimethy1disulfide (DMDS) and tetraethylorthosilicate (TEOS) by atmospheric pressure chemical vapor deposition. A comparison of anti-coking property of the coated and uncoated HP40 steel tubes has been made under the same conditions. SiO2/S composite coatings are compact and have better anti-coking property. The coke on the coated HP40 steel tube is about 22% of that on the uncoated HP40 steel tube, and only small granular coke is deposited on the coated HP40 steel tube. However, the filamentous coke is formed on the uncoated HP40 steel tube. SiO2/S composite coatings have good thermal stability at cracking temperature by the comparison of Raman spectra before and after coking. (C) 2007 Elsevier B.V. All rights reserved.