| 过渡金属型汽车尾气净化催化材料的制备及性能研究 |
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| 引用本文： | 桂客,瞿龙,刘素琴,王红霞,黄可龙. 过渡金属型汽车尾气净化催化材料的制备及性能研究[J]. 广州化学, 2003, 28(3): 16-20 |
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| 作者姓名： | 桂客 瞿龙 刘素琴 王红霞 黄可龙 |
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| 作者单位： | 中南大学,化学化工学院,湖南,长沙410083 |
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| 摘 要： | 采用固定床反应装置,模拟汽车尾气的组成成分,以CO/NH3为探针反应,分别研究了活性成分负载量及焙烧温度等因素对过渡金属氧化物催化材料MnOx/γ-Al2O3和Mn-Ce-O(x)/γ-Al2O3的催化活性的影响,并考察了该催化剂的抗硫化中毒性能和抗老化性能。在该研究条件下,氧化物负载量在0.12(质量分数),焙烧温度在700℃左右时,催化剂对NO-CO体系中CO的氧化率在85%以上。将催化剂在3.0%的SO2/空气气氛中强制中毒后,其对CO/NO体系中CO的催化转化率明显下降,但抗老化实验表明,该催化剂经900℃下,12%水蒸汽老化 60 h后,对CO的催化活性不仅没有下降,反而略有升高,说明该催化剂具有良好的抗老化性能和高温活性。
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| 关 键 词： | 汽车尾气净化材料 汽车尾气 金属氧化物催化剂 抗硫中毒 |
| 文章编号： | 1009-220X(2003)03-0016-05 |
| 修稿时间： | 2003-03-26 |
Synthesis and Properties of Catalytic Meterial of Transition Metal |
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| GUI Ke,QU Long,LIU Su-qin,WANG Hong-xia,HUANG Ke-long. Synthesis and Properties of Catalytic Meterial of Transition Metal[J]. Guangzhou Chemistry, 2003, 28(3): 16-20 |
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| Authors: | GUI Ke QU Long LIU Su-qin WANG Hong-xia HUANG Ke-long |
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| Abstract: | A new type of catalytic material for purification of automobile exhaust was studied. The factors affecting its catalytic activity,such as calcination temperature and the period of calcination and so on, were investigated. Its catalytic activity after SO2-poisoning was determined in a fixed-bed reactor by exposing the sample to the atmosphere of 160mL/min SO2/air. The results reveals that at the optimum process for the experiment, the selective catalytic oxidation of CO by NO is over 85%,and the catalytic material has good aging. |
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| Keywords: | automobile exhaust purifying material complex oxide resistance to so2-poisoning |
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