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Nb_2O_5加入到FeO_x中能显著地提高NO_x与NH_3和O_2还原反应的催化活性,转化率可达到90～100％,而没有加入Nb_2O_5的FeO_x的催化还原转化率小于40％。SO_2的存在,对于这种混合氧化物的催化活性几乎没有影响。
The addition of Nb_2O_5 to FeO_x can significantly increase the catalytic activity of NO_x reduction with NH_3 and O_2, and the conversion rate can reach 90-100%. The catalytic reduction conversion of FeO_x without Nb_2O_5 is less than 40%. The presence of SO 2 has little effect on the catalytic activity of this mixed oxide.