| 全Pd三效催化剂研究涂层材料的研究 |
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| 引用本文： | 周泽兴,王学中. 全Pd三效催化剂研究涂层材料的研究[J]. 环境化学, 2001, 20(1): 1-6 |
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| 作者姓名： | 周泽兴 王学中 |
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| 作者单位： | 中国环境科学研究院 |
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| 摘 要： | 制备了作为Pd三效催化剂涂层材料组成的活性Al2O3/金属氧化物添加剂试样，用BET法、XRD法及H2－TPR法对这些涂层原材料体系进行表征。结果表明：金属氧化物添加剂提高了活性Al2O3的热稳定性；添加ZrO2改善了CeO2的热稳定性；与含Ca的试样不同，含La试样没有贮氧能力。用含有Al2O3-CeO2/ZrO2和Al2O3-La2O3/BaO的涂层材料制备的Pd催化剂有好的CO，HC和NOx同时净化的三效性能和低的起燃活性。加入0．003％（V／V）SO2降低了催化剂活性，含La2O3/BaO涂层材料的Pd催化剂上NOx反应易被SO2中毒。
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| 关 键 词： | 车辆用催化剂 钯三效催化剂 涂层 氧化物添加剂 二氧化硫中毒 |
| 修稿时间： | 2000-04-17 |
STUDY ON PALLADIUM ONLY THREE-WAY CATALYST STUDY ON COATING MATERIALS |
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| Zhou Zexing,Wang Xuezhong. STUDY ON PALLADIUM ONLY THREE-WAY CATALYST STUDY ON COATING MATERIALS[J]. Environmental Chemistry, 2001, 20(1): 1-6 |
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| Authors: | Zhou Zexing Wang Xuezhong |
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| Abstract: | Active Al2O3/metal oxide additives,as coating materials of Pd three-way catalyst(Pd TWC)were prepared and characterized with BET,XRD and H2-TPR measurements.The thermal stability of active Al2O3 was enhanced by additives;Ce containing additives had oxygen storage capacity while La-containing samples didnt;Pd TWC prepared with two typical washcoats containing Al2O3-CeO2/ZrO2 and Al2O3-La2O3/BaO，respectively,showed excellent low temperature performances and three way reactivity;Addition of 0.003%(V/V)SO2 to feedstream decreased performances of Pd-TWC,and the conversion of NOx on catalyst containing La2O3/BaO was more affected. |
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| Keywords: | palladium three-way catalyst additives SO2 poison. |
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