V2O5/AC催化剂对氨还原NO的研究

考察了V2O5/AC催化剂对NH3选择催化还原NO的影响，结果表明，以浓硝酸预氧化处理的活性焦为载体对催化剂活性有很大提高，这是由于浓硝酸预氧化后，活性焦表面产生了较多的含氧官能团可能吸附更多的NH3,并且提高了活性组分V2O5的含量，反应气氛中加入SO2后，二都活性都增加，但差异消失，这是由于SO2存在时，反应生成的SO4^2-离子的酸性强于浓硝酸预氧化产生的含氧官能团的酸性，催化剂在使用前经过煅烧和氧化对催化剂活性有很大改善。SO2存在时，V2O5含量为1wt%的催化剂活性提高。

REDUCTION OF NO WITH NH3 ON V2O5/AC CATALYST

V 2O 5/AC is a good catalyst for selective catalytic reduction(SCR)of NO with NH 3.The activity of V 2O 5/AC catalyst is higher than that of the V 2O 5/w-AC,but the difference activities of these two catalysts disappeared when SO 2 was introduced into the reaction gases,which is due to the higher acidity of SO 2- 4.The activity of V 2O 5/AC catalyst,prepared by calcination and pre-oxidation,is better than that of catalyst prepared without calcination.The best amount of V 2O 5 loading is 1wt%.The activity of 1wt% V 2O 5/AC increases with increasing the reaction temperature.