低碳化学与化工2025，Vol.50Issue(10)：10-18,9.DOI:10.12434/j.issn.2097-2547.20240513
载体对负载型镍基催化剂二氧化碳-甲烷重整制合成气性能的影响
Effects of supports on performances of supported nickel-based catalysts for carbon dioxide-methane reforming to syngas
摘要
Abstract
Carbon dioxide(CO2)and methane(CH4)are the main greenhouse gases that cause global warming.Dry reforming(DRM)of CO2 and CH4 to syngas is one of the feasible solutions to greenhouse gas problem,but the catalyst is easily deactivated due to carbon deposition and metal sintering.Catalysts 6NiO/AC,6NiO/HZSM-5 and 6NiO/SA with nickel mass fraction of 6%were prepared by ultrasonic impregnation method using activated carbon(AC),HZMS-5 and aluminum slag as carriers.The catalytic performance of these catalysts for DRM reaction was studied in a fixed bed reactor,and the catalysts were characterized by XRD,N2 adsorption/desorption,TG and SEM.The results show that the catalytic activity of 6NiO/SA is the lowest among the three catalysts.6NiO/AC has the largest specific surface area and smaller metal grains,showing better catalytic activity than 6NiO/HZSM-5 and 6NiO/SA.Under the conditions of n(CO2)/n(CH4)of 1,the temperature of 900℃and the reaction time of 60 min,the CH4 conversion rate and CO2 conversion rate are 91.4%and 93.4%,respectively.The stability of 6NiO/AC was investigated under the conditions of n(CO2)/n(CH4)of 1,temperature of 800℃and reaction time of 240 min.It is found that the CH4 conversion rate is always maintained at about 70%.After the reaction,the carbon deposition type of 6NiO/AC is mainly filamentous carbon deposition,which ensures the active site of the catalyst.In addition,the introduction of excessive CO2 in the reaction system can make the reaction go forward,promote the carbon deposition gasification reaction and inhibit the carbon formation.关键词
二氧化碳-甲烷重整/镍基催化剂/活性炭/载体Key words
carbon dioxide-methane reforming/nickel-based catalysts/activated carbon/supports分类
化学化工引用本文复制引用
何聂燕,李学琴,刘鹏,雷廷宙,李瑶,赵振振,朱卫兵..载体对负载型镍基催化剂二氧化碳-甲烷重整制合成气性能的影响[J].低碳化学与化工,2025,50(10):10-18,9.基金项目
国家自然科学基金重点项目(52436007,52306223) （52436007,52306223）
江苏省科技创新专项资金项目(农业农村领域重大关键技术攻关)(BE2022426). （农业农村领域重大关键技术攻关）
