催化剂对汽车发动机烟灰燃烧性能的影响  

Study on the Motor Soot Combustion Perfermance over Different Catalysts

作　　者：陈敏[1] 倪哲明[1] 周碧[1] 袁贤鑫[1] 

机构地区：[1]杭州大学催化研究所,浙江工业大学

出　　处：《环境科学》1995年第6期24-25,28,共3页Environmental Science

摘　　要：将汽车排气管中收集到的烟灰与不同催化剂混合组成于混试样。利用ＴＧ－ＤＴＡ技术，考察了不同催化剂对烟灰的助燃作用。发现催化剂存在时烟灰的燃烧特征温度Ｔｍａｘ有较大程度的降低。催化剂的助燃活性：ＮｉＯ／Ａｉ２Ｏ３ＭＣｕＯ／Ａｌ２Ｏ３＞Ｖ２Ｏ３／Ａｌ２Ｏ３＞Ｐｄ／Ａｌ２Ｏ３＞Ａｇ２Ｏ＞Ａｌ２Ｏ３＞Ｃｒ２Ｏ３／Ａｌ２Ｏ３＞ＣｅＯ２／Ａｌ２Ｏ３，与金属氧化物的生成焓（一△Ｈ）有一定对应关系，随着—△Ｈ的增加，烟灰燃烧的Ｔｍａｘ出现一个最低值。n this paper, the soot collected from automobileexhaust pipe was mixed with different catalysts toform dry samples. TG--DTA method was appliedto investigate the comb u st ion - support lug performance of different catalysts. It has been foundthat the dust combustion temperature Tmax.. wasgreatly lowered when catalysts were used. Thecombustion -- supponing performance of catalystswas ordered as following: NiO/Al2O3 > CuO/Al2O3 >V2O5 /Al2O3 >Pd /Al2O3, >Ag2O/Al2O3 >Cr2O3/Al2O3>CeO2/Al2O3 and had a certain correlation to the --oH of metal oxide. With the increasing of - △H, a minimum Tmax can be observed.

关 键 词：烟灰燃烧 催化剂 TG-DTA技术 汽车 发动机 

分 类 号：U464.4[机械工程—车辆工程]