Zhu Tian-le, Hao Ji-ming, Fu Li-xin, Wang Jian-xin, Li Jun-hua, Liu Zhi-ming, Cui Xiang-yu
Department of Environmental Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China.
Huan Jing Ke Xue. 2004 May;25(3):26-9.
Catalytic properties of Ag/Al2O3, In/Al2O3, Sn/Al2O3, Co/Al2O3, Pt/Al2O3 and a two-stage catalyst composed of Ag/Al2O3 and Pt/Al2O3 were investigated for the selective reduction of NO by C3H6 or C2H5OH in excess oxygen. The Ag/Al2O3 showed the highest NO reduction activity among the catalysts studied. A substantial amount of CO was formed over alumina-based transient metal oxides. HC and CO oxidations over Pt/Al2O3 occurred in relatively low temperatures, compared with the other catalysts. The sequential use of Ag/Al2O3 and Pt/Al2O3 was effective to broaden the temperature window for the reduction of NO, to improve oxidation of HC and CO and to inhibit the formation of N2O and CH3CHO.
研究了Ag/Al₂O₃、In/Al₂O₃、Sn/Al₂O₃、Co/Al₂O₃、Pt/Al₂O₃以及由Ag/Al₂O₃和Pt/Al₂O₃组成的两段式催化剂在过量氧气存在下用C₃H₆或C₂H₅OH选择性还原NO的催化性能。在所研究的催化剂中，Ag/Al₂O₃表现出最高的NO还原活性。在氧化铝基过渡金属氧化物上会生成大量的CO。与其他催化剂相比，Pt/Al₂O₃上的HC和CO氧化反应在相对较低的温度下发生。依次使用Ag/Al₂O₃和Pt/Al₂O₃可有效拓宽NO还原的温度窗口，改善HC和CO的氧化，并抑制N₂O和CH₃CHO的形成。
