吸附NH3的活性焦脱除SO2的实验研究

对新鲜活性焦和吸附有NH3的活性焦脱除不同气氛中的SO2进行了实验研究。结果表明，当烟气中不含有H2O和O2时，SO2在新鲜活性焦表面的脱除主要是物理吸附。活性焦吸附NH3后，增加了焦表面的碱性，提高了活性焦对SO2的吸附能力。当烟气中含有H2O和O2时，SO2在新鲜活性焦表面的脱除包括吸附和表面反应。NH3吸附在焦表面，不仅与硫酸反应，而且焦表面碱性的增加对SO2的脱除有很大的促进作用。对活性焦样品X射线光电子能谱分析发现，NH3吸附在焦表面产生了含N官能团，此官能团增加了活性焦表面的碱性，对SO2的吸附及氧化具有促进作用。

Study of removal of SO2 by activated coke impregnated with NH3

Adsorption of SO2 from different containing gas by activated coke and activated coke impregnated with NH3 was studied. Experimental results show that when the flue gas without O2-containing and moisture, SO2 removal in the activated coke is physical adsorption. The activated coke is impregnated with NH3 , the NH3 on the surface of coke react with SO2, and improve the removal of SO2. When the flue gas with 02-containing and moisture, the activated coke removal of SO2 is the physical and reaction. The activated coke is impregnated with NH3 can promote the removal of SO2 significantly. Through X-ray photoelectron spectrometer find that the nitrogen-containing functional groups increase on the surface of activated coke impregnated with NH3. These functional groups advance the adsorption and oxidation of SO2.