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甲硫醇是一种特殊的有机物,其在空气中易转化形成有机气溶胶,导致大气光化学烟雾和雾霾等严重污染,所以甲硫醇的高效脱除研究工作目前已成为我国严控硫污染和实现硫以及VOCs(挥发性有机化合物)减排工作的新任务。简单综述了去除甲硫醇的基本方法和研究现状,重点介绍了目前关注度最高的方法——催化分解法,总结了催化剂体系的研究现状和进展,侧重于阐述催化剂酸碱性分解甲硫醇的影响及其相关的反应机制,选取了当前研究最新的催化剂H-ZSM-5、铈基催化剂、稀土Y,Sm,La,Gd,Sm,Nd改性的铈基催化剂和稀土改性的Ce/H-ZSM-5进行了介绍,同时简要总结了稀土在催化氧化降解有机硫化物方面的作用,以期为后续的相关研究提供可借鉴的思路。
Methyl mercaptan is a kind of special organic substance, which is easily converted into organic aerosol in air, leading to serious pollution such as atmospheric photochemical smog and haze. Therefore, the research on the efficient removal of methyl mercaptan has become a serious problem in our country And the new mission of reducing emissions of sulfur and VOCs (volatile organic compounds). In this paper, the basic methods and research status of methyl mercaptan removal are briefly reviewed. At present, the most concerned method - catalyzed decomposition method is introduced. The research status and progress of the catalyst system are summarized. The emphasis is put on the catalyst decomposition of methyl mercaptan And the related reaction mechanism, the current research on the latest catalyst H-ZSM-5, cerium-based catalysts, rare earth Y, Sm, La, Gd, Sm, Nd modified cerium-based catalysts and rare earth-modified Ce / H-ZSM-5 was introduced, and the role of rare earths in the catalytic oxidation of organic sulfides was briefly summarized in order to provide reference for the follow-up study.