文献类型：期刊文献

英文题名：Comparison of Growth Characteristics and Properties of CVD TiN and TiO2 Anti-Coking Coatings

作者：Tang, Shiyun Liu, Tao Duan, Shuiping Guo, Junjiang Tang, Anjiang

第一作者：Tang, Shiyun;唐石云

通信作者：Tang, SY[1];Tang, AJ[1];Tang, SY[2];Tang, AJ[2]

机构：[1]Guizhou Inst Technol, Coll Chem Engn, Guiyang 550003, Guizhou, Peoples R China;[2]Engn Technol Res Ctr Fluorine & Silicon Mat, Guiyang 550003, Guizhou, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Coll Chem Engn, Guiyang 550003, Guizhou, Peoples R China;corresponding author), Engn Technol Res Ctr Fluorine & Silicon Mat, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2019

卷号：7

期号：9

外文期刊名：PROCESSES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000489121800027)】；

基金：The research was funded by A Plan Project by Department of Science and Technology of Guizhou Province (Qiankehe LH Zi [2016]7104), Natural science foundation of Guizhou Provincial Department of Education (Qianjiaohe KY Zi [2016]014), and the Doctoral Scientific Research Foundation of Guizhou Institute of Technology.

语种：英文

外文关键词：hydrocarbon fuel; coke; anti-coking coating; growth characteristics

摘要：Coating metals with anti-coking materials inhibit their catalytic coking and are especially beneficial in the pyrolysis of hydrocarbon fuels. It is believed that growth characteristics and properties may play a pivotal role in the anti-coking performance of chemical vapor deposition (CVD) coatings. In this study, TiN and TiO2 coatings were obtained by CVD using TiCl4-N-2-H-2 and TiCl4-H-2-CO2 systems, respectively. The effects of deposition time, residence time, and partial pressure were examined, and the coating microstructure was characterized by scanning electron microscopy (SEM). The results reveal that the effect of deposition parameters on the growth characteristics of TiN and TiO2 coatings is very different. The growth of the TiN coating shows characteristics of the island growth model, while the TiO2 coating follows the layer model. In general, the growth rate of the star-shaped TiN crystals is higher than that of crystals of other shapes. For the TiO2 coating, the layer mode growth characteristics indicate that the morphology of the TiO2 coating does not change significantly with the experimental conditions. Coking tests showed that the morphology of non-catalytic cokes is not only affected by the temperature, pressure, and coking precursor, but is also closely related to the surface state of the coatings. Both TiN and TiO2 coatings can effectively prevent catalytic coking and eliminate filamentous cokes. In some cases, however, the N or O atoms in the TiN and TiO2 coatings may affect common carbon deposits formed by non-catalytic coking, such as formation of needle-like and flaky carbon deposits.