本文利用实验室规模的循环流化床烟气脱硫实验装置研究了200～400℃范围内的中温干法烟气脱硫过程,并通过对脱硫产物的各种分析,揭示了烟气中CO2及NO对脱硫过程的影响规律及机理.CO2对脱硫过程有抑制作用,尤其在反应温度大于300℃后,其作用已经不可忽视;NO对脱硫过程有促进作用,但是效果随温度的升高而减小,至350℃以上基本消失,这种促进作用主要是通过生成中间产物Ca(NO3)2而减少CaCO3、CaSO3的生成量来实现的,同时NO的参与也会改善反应的气相扩散条件.
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