摘要
随着环保法规的日益严格和人们环保意识的提高,柴油车尾气污染物中的炭烟颗粒对环境的严重污染引起了人们广泛的关注.利用催化净化技术实现炭烟颗粒的消除是目前最有效的途径之一,其中高活性催化剂的研发是决定该技术广泛应用的关键因素之一.近年来,铈基氧化物催化剂因其良好的氧化还原性能、适当的表面酸性以及较高的储/释氧容量而被广泛用于柴油机尾气炭烟颗粒的催化燃烧领域.研究铈基氧化物催化剂在炭烟催化燃烧反应高活性的本质,有助于了解炭烟颗粒催化燃烧过程的基本原理,为现有催化剂的优化和新型催化剂的设计提供科学指导.本文总结了近年来铈基氧化物催化剂材料在催化柴油机炭烟燃烧中的研究进展,主要包括单一氧化铈催化剂和稀土金属、过渡金属、碱(碱土)金属及贵金属改性的铈基氧化物催化剂.同时,对上述催化剂的反应机理进行了总结.最后,提出了铈基氧化物催化剂在催化柴油机炭烟燃烧中存在的问题并对其发展前景进行了展望.
With the increasingly strict environmental protection regulations and the improvement of people’s awareness of environmental protection,the serious environmental pollution caused by soot particles from diesel vehicle exhaust has attracted people’s attention.Catalytic purification technology is one of the most effective ways to eliminate soot particles and the research and development of highly effective catalysts is one of the key factors for determining the application of this technology.In recent years,cerium-based oxide catalysts have been widely used for catalytic combustion of diesel soot particles due to their excellent oxidation-reduction performance,suitable surface acidity,and high oxygen storage/release capacity.The researches focusing on highly active essence of the cerium-based oxide catalysts in soot combustion are helpful to understand the fundamental theories of catalytic processes of soot combustion and provide scientific guidances for the optimization of existing catalysts and design of new-type catalysts.In this review,the recent research progress of cerium-based oxide catalysts for diesel soot combustion is summarized,including single cerium oxide catalyst and cerium-based oxide catalysts modified by rare earth metals,transition metals,noble metals and alkali(alkaline earth)metals.Meanwhile,the reaction mechanisms of above-mentioned catalysts are also summarized.Finally,the problems and development directions of cerium-based oxide catalysts for soot combustion are proposed and prospected.
作者
彭超
于迪
王斓懿
张春雷
于学华
赵震
Chao Peng;Di Yu;Lanyi Wang;Chunlei Zhang;Xuehua Yu;Zhen Zhao(Institute of Catalysis for Energy and Environment,College of Chemistry and Chemical Engineering,Shenyang Normal University,Shenyang 110034,China;State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China)
出处
《中国科学：化学》
CAS
CSCD
北大核心
2021年第8期1029-1059,共31页
SCIENTIA SINICA Chimica
基金
国家科技部重点研发计划项目(编号:2017YFE0131200)
国家自然科学基金(编号:22072095,U1908204,21761162016)
辽宁省自然基金面上项目(编号:2019-MS-284)
移动源污染排放控制技术国家工程实验室开放基金(编号:NELMS2018A04)
沈阳师范大学创新团队支持计划
沈阳师范大学重大孵化项目(编号:ZD201901)资助项目。
关键词
铈基氧化物
催化剂
柴油机
炭烟颗粒
cerium-based oxide
catalyst
diesel engines
soot particles
