后处理工艺对Pd催化剂活性的影响

Effect of Post-Treatment on the Activity of Pd Catalyst

摘要: 采用浸渍法制备陶瓷蜂窝状汽车尾气催化净化剂的过程中,不同的后处理工艺对Pd催化剂活性有着重要的影响,本文对此进行了深入研究,得出最佳的后处理工艺是氢气还原后进行活化,达到良好的三效净化率通过对催化剂的活性评价以及SEM等测试手段对催化剂的性能进行了剖析.

Abstract: The influence of post-treatment on the activity of Pd catalyst was discussed in this article. The results showed that the best post-treatment is the calcination after reduction by the H₂. The catalysts prepared by the impregnation were tested by the conversion of CO, HC, NO_x, and have higher conversion efficiency. The properties of the catalysts were analyzed by the evaluation of activity and SEM.