文献类型：期刊文献

英文题名：Preparation and anti-coking application of sol-gel SiO2 coating in a delayed coking furnace

作者：Liu, Jinglei[1];Wang, Xiangxiang[1];Wang, Hao[1];Xu, Hong[1];Yang, Jiangfeng[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：11

期号：17

起止页码：9849

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20211210114370);WOS:【SCI-EXPANDED(收录号:WOS:000629707400009)】；

基金：This work is supported by Engineering Center of Efficient Green Process Equipment and Energy Conservation: no. 2011007411009, Ministry of Education and the Project of China Petroleum & Chemical Corporation: no. 116060.

语种：英文

外文关键词：Adhesion - Infrared spectroscopy - Silicon alloys - Substrates - Corrosion resistant coatings - Silicon oxides - Sol-gels - Fourier transforms - Scanning electron microscopy - Silicon - Zirconia - Chromium alloys - Sulfur compounds - Silica - Energy dispersive spectroscopy - Iron alloys - Corrosion resistance

摘要：To isolate iron sulphide and reduce coke adhesion reactions that occur on the surface of a delayed coking furnace, a SiO2 coating was developed on Cr9Mo alloy by employing the sol-gel method. The coating was characterised through Fourier transformation infrared spectroscopy, X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, potentiodynamic scanning, InfiniteFocus optical 3D surface metrology, thermal shock and coking experiments. After heat treatment at 550 degrees C, the silicon methyl groups were oxidised and the coating exhibited a Si-O-Si connected crosslinked network structure. The coating surface was uniformly dense with a roughness and thickness of 0.2 and approximately 4 mu m, respectively. The coating still adhered to the substrate tightly after 20 cycles of thermal shock treatment. Compared with an uncoated sample, the coating effectively improved the corrosion resistance of the substrate, suppressed the iron sulphide reaction, and reduced coke adhesion onto the sample. The coating had a better inhibition effect on coke fouling in a delayed coking furnace.