The Ag/Al2O3 and Pt/Al2O3 combined system with ethanol as the reductant was effective to broaden the temperature window for the reduction of NO, and the maximum NO conversion reached 90% and the HC and CO conversions were above 90%.

• Ag/Al2O3氧化物催化剂和Pt/Al2O3贵金属催化剂串联组合时,在发动机台架上乙醇选择性还原NOx的最大转换率达90%25,一氧化碳和碳氢化合物的净化效率大于90%25。