催化还原SO2为单质硫技术的研究进展

催化还原法脱硫是一种能够直接回收单质硫的烟气脱硫(FGD)技术,近年来倍受关注.尽管催化还原法脱硫技术所采用的催化剂的种类繁多,但是该技术所采用的还原剂的种类却相对较少.以H2、C、CH4、NH3和CO 5种还原剂为分类标准,综述了催化还原SO2为单质硫技术的主要研究成果;讨论了相关催化剂的性质和催化反应机理;分析了不同还原脱硫技术的优缺点.最后,论述了催化还原法脱硫有待解决的关键问题与发展趋势.

The Research Progress on Catalytic Reduction of SO2 to Elemental Sulfur

Catalytic reduction of SO2 to elemental sulfur is one kind of flue gas desulfurization(FGD) technique that can directly take back elemental sulfur and close attention is paid in recent years.Though various kinds of catalysts are used in this technique,the kind of reducers is comparatively less.Therefore,starting from H2,C,CH4,NH3,and CO as five reduction agents,the main research achievements of FGD by catalytic reduction are described;meanwhile the properties of catalysts,reaction mechanisms,and advantages and disadvantages by different reducers are also summarized.Finally the key problems existed in this technology and the development trends are discussed.