基于含稀土元素关键材料的有机硫污染物脱除研究进展

Research Progress on the Removal of Carbonyl Sulfide by Using the Key Materials Containing the Rare Earth Elements

稀土元素因具有特殊的外电子层结构,在诸多优异的功能材料中占据重要地位,被广泛用于催化、吸附、电磁、生物成像等基础与应用技术研究中。此外,稀土元素可作为催化剂活性物质、助催化剂、添加剂、载体、吸附剂活性物质,被成功地应用于诸多环境保护与污染物治理相关过程。羰基硫(COS)作为一类最主要的有机硫污染物之一,广泛存在于包括天然气、钢铁行业高炉煤气等多种工业烟气与燃料气中。目前,实现COS的高精度大通量脱除对燃料产品增值与环境保护意义重大。本文从COS催化水解、COS吸附以及COS加氢转化等多方面综述了稀土元素在有机硫COS脱除研究领域的发展现状与技术进展,讨论了稀土元素应用于COS脱除方面亟待解决的关键问题。

Due to their special outer electron layer structure,rare earth elements play an important role in many excellent functional materials,and are widely used in the research of basic and applied technologies such as catalysis,adsorption,electromagnetics,biological imaging,etc.In addition,rare earth elements can be used as catalytic active sites,cocatalysts,additives,carriers,and adsorbent,and have been successfully applied to many processes related to environmental protection and pollutant treatment.Carbonyl sulfide(COS)as one of the most important organic sulfur pollutants widely exists in a variety of industrial flue gas and fuel gas,including natural gas,blast furnace gas in steel industry and so on.At present,the high-precision and high-throughput removal of COS is of great significance for production of value-added fuels and also for environmental protection.In this paper,the development and research progress of rare earth elements employed in the removal of organic sulfur-containing compound,i.e.COS are reviewed from the aspects of catalytic hydrolysis of COS,COS adsorption and hydrogenation of COS.The key issues on the application of rare earth elements in COS removal are discussed and outlooked.