低碳化学与化工2024，Vol.49Issue(11)：1-11,11.DOI:10.12434/j.issn.2097-2547.20240236
稀土元素改性CO2加氢制甲醇催化剂的研究进展
Research progress on catalysts modified by rare earth elements for CO2 hydrogenation to methanol
摘要
Abstract
Fossil fuels have an important contribution to human society,but the large amount of CO2 emissions has a negative impact on the global climate.CO2 hydrogenation to methanol not only effectively reduces the concentration of CO2 in the atmosphere,but also provides high value-added chemicals.A range of non-precious metal(Cu)-based,precious metal(Pd)-based and bimetallic oxide catalysts have been used for CO2 hydrogenation to methanol.However,conventional Cu-based catalysts suffer from harsh reaction conditions and easy sintering as well as agglomeration of active sites.Pd-based catalysts are more resistant to sintering and have excellent reactivity at low temperatures,but noble metals have weak adsorption of CO2,and CO2 is difficult to be activated at low temperatures.Bimetallic oxide catalysts(mainly ln2O3-based and ZrO2-based catalysts)have excellent catalytic performance and good stability.Among which,the stability of In2O3 alone is poor,and the active phase In2O3-x of In2O3-based catalyst is easily deactivated by excessive reduction to form metal In,which needs to be doped with other modified elements to further improve its stability and activity.The catalytic performance of ZrO2 alone for CO2 hydrogenation to methanol is not ideal,and its catalytic performance needs to be improved by interacting with other metals or metal oxides.Rare earth elements(La,Ce and Y)as modified elements or their oxides as catalyst carriers can effectively regulate the surface acidity and alkalinity of catalysts,the dispersion of active phases and their specific surface area and metal-carrier interactions,etc.,so as to improve the adsorption and activation capacity of catalysts for CO2,increase the selectivity of products and enhance the stability of the catalysts.The modification effects of La,Ce and Y on Cu-based,Pd-based and bimetallic oxide catalysts were reviewed,in order to provide reference for the development and application of catalysts modified by rare earth elements for CO2 hydrogenation to methanol.关键词
CO2加氢/甲醇/稀土元素/改性作用Key words
CO2 hydrogenation/methanol/rare earth elements/modification effects分类
化学化工引用本文复制引用
杨军,梁丽烨,李华,徐彩玲,吴剑峰,丑凌军..稀土元素改性CO2加氢制甲醇催化剂的研究进展[J].低碳化学与化工,2024,49(11):1-11,11.基金项目
中国北方稀土(集团)高科技股份有限公司企业项目(BFXT-2023-D-0048) （集团）
甘肃省重点人才项目. （）
