冶炼烟气中SO2催化还原为元素S的研究进展

冶炼烟气中SO2催化还原为元素S是利用适当的还原剂将烟道气中的SO2选择性地催化还原成单质硫,这种方法的最终产物是固态单质硫,无废水废渣排放。因此,把烟气中的SO2选择性的还原为单质硫将是一种既具有经济效益又具有社会效益的适合我国国情的烟气脱硫方法。本文综述了目前将烟气中SO2催化还原为元素硫进行回收的主要方法,分析了每种方法的优缺点,并提出烟气中SO2直接还原脱硫技术所存在的问题和发展趋势。

Development of catalytic reduction of SO2 in the flue gas to elemental sulfur

Catalytic reduction of SO2 in the flue gas to elemental sulfur by way of some appropriate reducing agent not only removes air pollution but also recycles. The final product of this desulfurization technique is solid element sulfur with no waste water and no waste slag. Therefore, the selective catalytic reduction of SO2 in the flue gas to element sulfur will be a kind of broad market prospects with both economic and social benefits with the national conditions of China. This paper summarizes the main recycling method of the selective catalytic reduction of SO2 in the flue gas to element sulfur at present, the advantages and disadvantages of each method are also summarized, finally the key problems existed in this technology and the development trends are proposed.