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环境化学  2015 

V2O5/AC催化剂对氨还原NO的研究

Keywords: 催化剂,NO,预氧化

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Abstract:

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,二者活性都增加,但差异消失,这是由于SO2存在时,反应生成的SO42-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%的催化剂活性最高。

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