| 摘要:利用自蔓延高温燃烧合成法(SHS)在商用空白催化型柴油颗粒过滤器(CDPF)载体上涂覆制备了一系列CuCeZrO2-δ 及KCuCeZrO2-δ催化剂，并利用碳烟颗粒快速加载装置对CDPF载体加载，以模拟真实的柴油机碳烟颗粒情况。程序升温氧化活性测试结果显示:CuCeZrO2-δ催化剂在通入800 ×10-6 NO/6.5% O2/N2混合气时，通过在低温下氧化NO成NO2来氧化碳烟颗粒；同时在铜(Cu)成分为90%时有最好的氧化活性；加入钾(K)之后，碳烟颗粒的低温氧化活性得到进一步改善，在K取代Cu含量的20%时活性最佳。研究表明:这两种催化剂有望取代贵金属Pt成为新型非贵金属CDPF催化剂。 |
| 关键词: CDPF 催化剂；碳烟颗粒；氧化活性；自蔓延高温燃烧合成法 |
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| Study on the Catalytic Oxidation of Carbon Soot Particles with PotassiumCopper Cerium Zirconium Composite Metal Oxides |
| Gong Xingyu,Guan Bin,Li Ke,Lin He |
| Key Laboratory for Power Machinery and Engineering of the Ministry of Education，Shanghai Jiaotong University，Shanghai 200240 |
| Abstract:A series of CuCeZrO2-δ and KCuCeZrO2-δ catalysts have been one step synthesized and coated in commercial blank CDPF vectors by self propagating high temperature synthesis (SHS) method, and soot particles are loaded with a PM fast loading device to CDPF vectors to simulate the real diesel condition of carbon soot particles. Temperature programmed oxidation activity test results show that the catalyst CuCeZrO2-δ oxidized particles through the low temperature oxidation of NO to NO2 in the 800×10-6 NO/6.5% O2 / N2 mixed gas. The one with 90% of Cu had the best oxidation activity. After the addition of K, the low temperature oxidation activity of the particles was further improved, and the catalysts with 20% K replaced of 90%Cu had the best activity. The above two catalysts could replace noble metal Pt to be a new kind of non-noble metal CDPF catalyst. |
| Key words: CDPF catalyst carbon soot particle oxidative activity SHS method |
