文献类型：期刊文献

英文题名：Effect of PdSX on Sulfur Resistance of Pd-Based Catalysts for CO Oxidation

作者：Ju, Feng[1,2];Ling, Hao[1];Qian, Chengyi[1];Bian, Jiawei[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Univ Utrecht, Debye Inst Nanomat Sci, Inorgan Chem & Catalysis, NL-3584 CS Utrecht, Netherlands

年份：2023

卷号：62

期号：6

起止页码：3038

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20230613539025);WOS:【SCI-EXPANDED(收录号:WOS:000925963700001)】；

基金：ACKNOWLEDGMENTS This work is supported by the National Natural Science Foundation of China (22008071) .

语种：英文

外文关键词：Catalyst activity - Catalytic oxidation - Exhaust gases - Palladium compounds - Sulfur

摘要：Carbon monoxide (CO) is one of the most widely spread and enormous pollutants in the atmosphere, and CO catalytic oxidation is the primary method for reducing CO levels. Pd catalysts show excellent catalytic performance in CO catalytic oxidation, yet the majority of Pd-based catalysts are weakly resistant to sulfur. SO2, which is particularly harmful to the catalyst, is frequently present in industrial exhaust gases. Therefore, in this report, we have used a H2S-pretreated Pd-based catalyst for CO catalytic oxidation with outstanding catalytic activity, sulfur resistance, and high stability. A series of character-izations were carried out on the fresh and used catalysts, revealing that the catalytic activity is determined by Pd0 and the sulfur resistance is dependent on PdSx species. The PdSx content is adjusted by changing the concentration of H2S in the gas sulfidation process. The catalytic activity of the PdSx catalyst is much superior to that of other Pd-based catalysts, enabling complete oxidation of CO at around 200 degrees C. For the long-term test, the PdSx catalyst showed good ability and the conversion of CO was maintained at 94.93% in the presence of 500 ppm SO2 for 300 h, indicating the excellent stability. At last, CO catalytic oxidation and sulfur resistance mechanisms are presented and discussed, which will provide an insight in the design of sulfur-resistant catalysts.