燃料化学学报（中英文）2026，Vol.54Issue(1)：67-77,11.DOI:10.3724/2097-213X.2025.JFCT.0018
锰掺杂提升镍基CO2甲烷化催化剂抗硫中毒的性能与机理研究
Manganese doping improves the sulfur resistance of nickel-based catalysts for CO2 methanation
摘要
Abstract
Coal-fired power plants,as the primary source of CO2 emissions,have garnered significant attention for carbon reduction under the"dual carbon"goals.CO2 methanation is considered to be the most practical and effective way to achieve carbon recycling,however,the most widely used nickel-based catalysts in CO2 methanation are prone to sulfur poisoning deactivation due to SO2 in the flue gas.In this paper,a series of Mn-modified Ni/γ-Al2O3 were prepared by wet impregnation method,which had anti-sulfur poisoning properties.The structure and physicochemical properties of the catalysts were investigated using various methods such as XRD,XPS,CO2-TPD,SO2-TPD and H2-TPR,and the mechanism by which the maintain high catalytic activity while possessing sulfur resistance was elucidated.The results show that 4Mn-Ni/Al2O3 exhibits the best catalytic performance and sulfur resistance,with a maximum CO2 conversion rate of 88.27％.After 3 h of SO2 exposure,the CO2 conversion rate only decreased by 11.32％.Mechanistic studies indicate that Mn can serve as a sacrificial site to protect Ni sites from sulfur poisoning,while the interaction between Ni and Mn suppresses the adsorption of SO2 on the catalyst surface,thereby enhancing sulfur resistance.This research provides a feasible solution for the direct methanation of CO2 from coal-fired SO2 flue gas.关键词
催化活性/催化剂/抗硫性能/活性位点/甲烷Key words
catalytic activity/catalyst/sulfur resistance/active site/methane分类
化学化工引用本文复制引用
申瑛,许紫阳,陈亮,王春波..锰掺杂提升镍基CO2甲烷化催化剂抗硫中毒的性能与机理研究[J].燃料化学学报（中英文）,2026,54(1):67-77,11.基金项目
Supported by the National Natural Science Foundation of China(52306135)and Natural Science Foundation of Hebei Provience(E2024502035).国家自然科学基金(52306135)和河北省自然科学基金(E2024502035)资助 （52306135）
