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›› 2007, Vol. 7 ›› Issue (6): 1243-1248.

• 材料工程专栏 • 上一篇    下一篇

Preparation and Anti-coking Property of SiO2/S Coating on HP40 Tube

周建新,徐宏,张莉,刘京雷,戚学贵,彭博   

  1. 华东理工大学机械与动力工程学院
  • 出版日期:2007-12-20 发布日期:2007-12-20

Preparation and Anti-coking Property of SiO2/S Coating on HP40 Tube

ZHOU Jian-xin,XU Hong,ZHANG Li,LIU Jing-lei,QI Xue-gui,PENG Bo   

  1. School of Mechanical and power engineering, East China University of Science and Technology
  • Online:2007-12-20 Published:2007-12-20

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摘要： SiO2/S coating was prepared on the inner surface of an HP40 tube using dimethyldisulfide and tetraethylorthosilicate by atmospheric pressure chemical vapor deposition (APCVD) to alleviate catalytic coking on the inner surface of radiant tube for ethylene production in petrochemical plants. The comparative coking experiments with the coated and uncoated HP40 tubes were carried out under the same cracking conditions. SiO2/S coating was compact and had excellent anti-coking property. The coke on the coated HP40 tube was about 22% of that on the uncoated HP40 tube, and only small granular coke was deposited on the coated HP40 tube. However, the filamentous coke formed on the uncoated HP40 tube. The thermal stability of SiO2/S coating was satisfactory at cracking temperature, and the anti-coking property of SiO2/S coating was still over 60% after 3 coking and decoking cycles.

关键词: atmospheric pressure chemical vapor depo, SiO2/S coating, HP40 tube, coke

Abstract: SiO2/S coating was prepared on the inner surface of an HP40 tube using dimethyldisulfide and tetraethylorthosilicate by atmospheric pressure chemical vapor deposition (APCVD) to alleviate catalytic coking on the inner surface of radiant tube for ethylene production in petrochemical plants. The comparative coking experiments with the coated and uncoated HP40 tubes were carried out under the same cracking conditions. SiO2/S coating was compact and had excellent anti-coking property. The coke on the coated HP40 tube was about 22% of that on the uncoated HP40 tube, and only small granular coke was deposited on the coated HP40 tube. However, the filamentous coke formed on the uncoated HP40 tube. The thermal stability of SiO2/S coating was satisfactory at cracking temperature, and the anti-coking property of SiO2/S coating was still over 60% after 3 coking and decoking cycles.

Key words: atmospheric pressure chemical vapor deposition, SiO2/S coating, HP40 tube, coke