二氧化硫在化学资源化利用中的研究进展

Research Progress on Chemical Resourse Utilization of Sulfur Dioxide

二氧化硫(SO_(2))过量排放对自然环境造成了严重威胁,使得SO_(2)的捕集和利用在工业生产中被广泛关注。目前,SO_(2)的捕集技术已经相对成熟,对捕集后SO_(2)的高附加值利用成为当前的热点问题。在SO_(2)利用方法中,化学资源化利用由于具有原子经济性高、能耗低等优点,是实现SO_(2)高附加值最有前景的方法之一。本文综述了SO_(2)在无机反应中的氧化、还原反应,有机反应中的小分子、大分子方面的转化研究进展。介绍了SO_(2)在化学资源化利用中的反应机理、反应条件、转化效果,以及不同催化剂的应用对反应效果的影响等情况;指出了在SO_(2)化学利用中反应条件严苛、对催化剂依赖性高等方面的问题;展望了在SO_(2)化学资源化利用研究中的进一步重点研究方向。

Excessive emission of sulfur dioxide(SO_(2)) poses a serious threat to the natural environment, making the capture and utilization of SO_(2)widely concerned in industrial production. Currently, technologies of capturing SO_(2)have been relatively mature, and the value-added utilization of the captured SO_(2)has become a hot-point issue. Among various SO_(2)utilization technologies, chemical utilization is considered to be one of the most promising methods for realizing value-addition of SO_(2)because of the advantages of excellent atomic economy and low energy consumption. In this paper, the oxidation and reduction of SO_(2)and organic synthesis using SO_(2)in inorganic and organic reactions are reviewed. The reaction mechanism and reaction conditions of conversion of SO_(2), and the influence of different catalysts on the reactions are introduced. The challenges of severe reaction conditions and high dependence on catalysts in chemical utilization of SO_(2)are pointed out. The further research directions of chemical utilization of SO_(2)are prospected.