摘要
在富氧条件下,以乙醇为还原剂,考察了不同金属负载量的Ag/Al2O3和Cu/Al2O3催化剂选择性还原NOx的活性.结果表明,4%Ag/Al2O3和10%Cu/Al2O3分别为各自体系中的最佳催化剂.4%Ag/Al2O3具有很高的选择性催化还原NOx的活性,但同时会产生一定量的副产物CO.10%Cu/Al2O3选择性催化还原NOx的活性不高,但却具有很好的消除CO的活性.将4%Ag/Al2O3和10%Cu/Al2O3以不同方式组合,其评价结果表明,4%Ag/Al2O310%Cu/Al2O3组合催化剂具有与单纯4%Ag/Al2O3相似的NOx脱除活性,同时能够完全消除反应过程中产生的CO,并且能大大降低尾气中乙醇和乙醛的浓度.
The selective catalytic reduction of NOx by ethanol was studied over Ag/Al2O3 and Cu/Al2O3 catalysts with different metal loadings. The 4 % Ag/Al2O3 and 10 % Cu/Al2O3 showed the highest NOx reduction activity, respectively. The 4 % Ag/Al2O3 catalyst showed excellent NOx to N2 activity but produced a large amount of CO during the reduction process. The 10 % Cu/Al2O3 catalyst was not so active in the reduction of NOx by ethanol, but it was very effective for removing the CO. The combined catalyst formed by direct placing 10 % Cu/Al2O3 after 4 % Ag/Al2O3 showed a similar activity for the NOx reduction and could also remove the CO efficiently. In addition, the concentration of ethanol and aldehyde was also greatly reduced in the effluent gas.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2005年第8期645-649,共5页
基金
中国科学院"百人计划"
国家高技术研究发展计划(863计划)(2003AA643010)资助项目.
关键词
银
铜
氧化铝
负载型催化剂
组合催化剂
氮氧化物
选择性催化还原
乙醇
silver, copper, alumina, supported catalyst, combined catalyst, nitrogen oxide, selective catalytic reduction, ethanol
