甲硫醇恶臭气体治理技术的研究现状及展望

Research status and prospects of methyl mercaptan malodorous gas treatment technology

针对甲硫醇(CHSH)的气味恶臭、嗅阈值低、来源广泛、对人体和环境都会产生巨大危害的问题,阐述了国内外甲硫醇常用治理技术的研究现状,重点介绍了近年来新兴热门的催化分解法、催化氧化法、光催化氧化法以及低温等离子体法等甲硫醇处理技术,并指出了其各自的适用范围和优缺点.结果表明:催化分解法、催化氧化法和光催化氧化法均具有处理效率高、适应性好和产物危害小等优点,但也存在催化剂的活性与稳定性差等问题;低温等离子体法具有高效、灵活的特点,但存在能量利用率低、易产生有毒副产物等缺点;在单一处理工艺很难满足经济性的情况下,要想高效处理甲硫醇,就应协同使用多种处理工艺,同时还需要进一步探究降解机理.

According to the problems of methyl mercaptan(CHSH) with foul odor, low odor threshold, wide range of sources and great harm to the human body and the environment, the research status of common technologies for the treatment of methyl mercaptan at home and abroad was reviewed. The emerging and popular treatment methods of methyl mercaptan-catalytic decomposition method, catalytic oxidation method, photocatalytic oxidation method and low temperature plasma method in recent years were mainly introduced, and the respective scope of application, the advantages and disadvantages were also pointed out. The results show that catalytic decomposition method, catalytic oxidation method and photocatalytic oxidation method have the advantages of high treatment efficiency, good adaptability and less product harm, but there are also shortcomings of poor catalyst activity and stability. The low-temperature plasma method is efficient and flexible, but it has disadvantages of low energy utilization efficiency and easy generation of toxic by-products. A single technology is difficult to achieve high-efficiency methyl mercaptan treatment effect with satisfying the economy at the same time. The coupling and synergistic use of multiple treatment processes and the in-depth study of the degradation mechanism are the research emphasis of methyl mercaptan treatment technology in the future.