文献类型：期刊文献

英文题名：Support-Dependent Activity and Thermal Stability of Ru-Based Catalysts for Catalytic Combustion of Light Hydrocarbons

作者：Xia, Hangqi[2,3];Bai, Yuting[2];Niu, Qiang[3];Chen, Biao[2];Wang, Feng[2];Gao, Biao[2];Liu, Lilin[2];Wang, Xingyi[2];Deng, Wei[1];Dai, Qiguang[2]

机构：[1]Jianghan Univ, Sch Optoelect Mat & Technol, Wuhan 430056, Hubei, Peoples R China;[2]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[3]Erdos Elect Power & Met Grp Co Ltd, Ordos 016064, Inner Mongolia, Peoples R China

年份：2023

卷号：62

期号：4

起止页码：1826

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20230513499980);WOS:【SCI-EXPANDED(收录号:WOS:000922138500001)】；

基金：ACKNOWLEDGMENTS This work was supported by the National Key Research and Development Program of China (2022YFB3504200) and National Natural Science Foundation of China (22276055 and 21922602) .

语种：英文

外文关键词：Alumina - Aluminum oxide - Catalysis - Catalyst activity - Catalyst supports - Combustion - Ethane - High temperature applications - Methane - Propane - Ruthenium - Silica - Thermodynamic stability

摘要：Ru-based catalysts are the most promising and concerned candidates for catalytic combustion of propane as one of light hydrocarbons (LHs). In this work, different supports such as SiO2, Al2O3, CeO2, and Co3O4 were investigated to unravel the nature of high activity for catalytic combustion of LHs, and effects of Ru content, high-temperature aging, high weight hourly space velocity, and H2O were focused on. The pristine CeO2 was lowly active for catalytic combustion of methane, ethane, and propane (T-90C3 > 400 degrees C), while the pristine Co3O4 and doped Co3O4 presented high activity (T-90C3 < 200 degrees C), the loading of Ru sharply improved the activity of CeO2 especially for ethane and propane (T-90C3 < 150 degrees C) and observably depended on the Ru content, and the promotion of RuOx to Co3O4-based supports was incon-spicuous. However, Ru/CeO2 catalysts were inferior to catalytic combustion of methane and lowly resistant to the high-temperature aging compared with Ru/Co3O4 catalysts. Based on characterization results and comparison with SiO2 supports with different surface areas, the Ru-O-M interface or highly dispersed RuOx species were determined as the main active sites for catalytic combustion of LHs and as follows: Ru-O-Ce interface > Ru-O-Co interface approximate to Co3O4 > highly dispersed RuOx >> CeO2. Ru-supported Co3O4 and doped Co3O4 especially Ce-doped Co3O4 demonstrated superior versatile activity, stability, and resistance to high temperature and H2O under harsh conditions close to the real full-scale applications, which showed the potential to eliminate the industrial VOC emissions. By contrast, Ru/CeO2 was considered to be promisingly practiced in the portable NMHC detection/monitoring system due to the huge difference in catalytic combustion of ethane/propane and methane. This work was considered to be attributed to the further understanding of the activation of C-H bonds, the optimization of Ru-based catalysts for catalytic combustion of LHs, and the rational screening of potential catalysts for different practical application scenarios.