| C3H6和C3H8的性质差异对Pt-Rh型汽车排气催化剂起燃特性的影响 |
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| 引用本文： | 章丽萍,朱振忠,田群. C3H6和C3H8的性质差异对Pt-Rh型汽车排气催化剂起燃特性的影响[J]. 交通环保, 2004, 25(2): 18-20 |
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| 作者姓名： | 章丽萍 朱振忠 田群 |
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| 作者单位： | 1. 中国矿业大学化学与环境工程学院,北京,100083
2. 中科院生态环境研究中心,北京,100085 |
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| 摘 要： | 在实验室模拟研究中,丙烷和丙烯在Pt-Rh型汽车尾气催化剂表面的催化氧化性能的差异,会对催化剂的起燃特性表现造成影响.由于丙烯在催化剂表面存在较严重的自中毒作用,使得CO和NOx的低温起燃特性变差.在低温下,由于丙烷相对丙烯催化燃烧速率较慢,剩余的氧气和NOx发生竞争反应,导致NOx的温度-转化率曲线出现S型的起伏.
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| 关 键 词： | 丙烷 丙烯 Pt-Rh 三效催化剂 起燃特性 自中毒 竞争反应 |
| 文章编号： | 1006-4281(2004)02-0018-03 |
| 修稿时间： | 2004-02-08 |
The Impacts of Differences Between C3H6 and C3H8 to the Catalytic light-off Performance of Pt-Rh Type Automotive Catalyst |
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| ZHANG Li-ping,ZHU Zhen-zhong,TIAN Qun. The Impacts of Differences Between C3H6 and C3H8 to the Catalytic light-off Performance of Pt-Rh Type Automotive Catalyst[J]. Environmental Protection in Transportation, 2004, 25(2): 18-20 |
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| Authors: | ZHANG Li-ping ZHU Zhen-zhong TIAN Qun |
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| Affiliation: | ZHANG Li-ping~1,ZHU Zhen-zhong~1,TIAN Qun~2 |
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| Abstract: | Due to the different catalytic oxidation property between propylene and propane,the impact of nature of hydrocarbon to light-off performance is investigated in laboratory simulated evaluation system.The self-poisoning effect of propylene on the surface of Pt-Rh type catalyst inhibits the conversion of CO and NOx under low temperature.The oxidation rate of propane is much lower than propylene at the temperature of complete oxidation of CO,which cause the surplus of oxygen.The presence of oxygen will cause competing reaction with NOx SCR,which results in S-shaped fluctuation of NOx conversion-temperature curve. |
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| Keywords: | propylene propane Pt-Rh TWC light-off self-poisoning competing reaction |
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