低碳化学与化工2023，Vol.48Issue(6)：24-29,6.DOI:10.12434/j.issn.2097-2547.20220378
助剂对Co/SiO2催化剂逆水煤气变换反应催化性能的影响
Effect of promoters on catalytic performance of Co/SiO2 catalysts for reverse water-gas shift reaction
摘要
Abstract
The reverse water-gas shift(RWGS)reaction is one of the effective ways of carbon dioxide(CO2)conversion.However,the RWGS catalyst has the problem of poor stability under high temperature.A series of Co/SiO2 catalysts with promoters(CeO2,La2O3,Y2O3 or ZrO2)were prepared by incipient-wetness impregnation method for the RWGS reaction.The catalysts were characterized by X-ray diffractometry,transmission electron microscopy and H2-programmed temperature reduction,etc.The effects of promoters on the catalyst structure and RWGS reaction performance were studied.The results of catalyst characterization show that the particle size of Co3O4 in the catalyst is not significantly changed by adding promoters.The promoters of CeO2,La2O3,Y2O3 and ZrO2 interacte with the cobalt component.The catalytic performance test results show that the CO2 conversion rate of the Co/SiO2 catalysts decreases from 28.3%to 9.0%after reaction at 600 ℃ for 12 h.The stability of the catalysts with promoters is improved,and the Co-ZrO2/SiO2 catalyst has the best stability,and the CO2 conversion rate is still as high as 21.9%after reaction for 12 h.This is due to the presence of interaction between the promoters and the cobalt component after the addition of the promoters,which improves the stability of the active component of cobalt.关键词
逆水煤气变换反应/助剂/Co/SiO2/等体积浸渍法/CO2转化Key words
reverse water-gas shift reaction/promoter/Co/SiO2/incipient-wetness impregnation method/CO2 conversion分类
化学化工引用本文复制引用
曹忠,刘宁,崔莎,刘辉,王路辉..助剂对Co/SiO2催化剂逆水煤气变换反应催化性能的影响[J].低碳化学与化工,2023,48(6):24-29,6.基金项目
国家自然科学基金(21406206) （21406206）
舟山市科学技术局浙江海洋大学科技专项重点项目(2022C41002) （2022C41002）
浙江省石油化工环境污染控制重点实验室开放基金(2021Z01). （2021Z01）
