摘要
以天然海泡石为原料 ,经酸改性后作载体。采用浸渍法制成了用于NOx 由CO还原的Cu基催化剂。在稀薄燃烧条件下 ,考察了它对汽车尾气中NOx 的还原性能。实验结果表明 ,Cu 海泡石催化剂在富氧条件下具有良好的耐湿热稳定性和催化活性 ,当转化率达到 90 %时 ,反应温度 <40 0℃。当掺入稀土元素Ce和Sm后 ,由于与活性组分Cu之间的协同效应 。
The natural sepiolite has been treated with hydrochloric acid and then been used as carrier. Cu/sepiolite catalyst was prepared by impregnation and the catalytifc activity for NO x reduction by CO was evaluated. It was found that the Cu/sepiolite catalyst has good anti-water and thermal stable properties under lean burn conditions. When the conversion reached 90%, the operation temperature was bellow 400 ℃. It was observed that the addition of Ce and Sm increases the endurance of oxygen of the catalysts because of the synergetic effect between the rare earth and metal Cu.
出处
《环境污染治理技术与设备》
CSCD
北大核心
2003年第2期14-17,共4页
Techniques and Equipment for Environmental Pollution Control
