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铜/海泡石催化还原NO的研究(英文)

Keywords: 铜/海泡石,NO,催化还原

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Abstract:

为了对NO进行有效的净化,研究了一种新型催化剂——铜/海泡石.海泡石用盐酸进行改性,由正交实验优化确定了改性条件:盐酸浓度为1.2mol/L;固液体积比为1:20;浸泡时间为20h和浸泡温度为333K.研究表明,在稀薄燃烧条件下,铜/海泡石对NO的还原具有良好的催化活性.Cu负载量为5%,灼烧成型温度为673K条件下制备的催化剂具有最好的活性,593K时,NO的转化率达90%.掺入稀土元素Ce和Sm可以提高铜/海泡石的催化性能.考察了氧成分和空速等对催化活性的影响,并用TGA,XRD,H2-TPR和BET等对该催化剂进行表征.实验结果表明:铜/海泡石是一种NO选择催化还原的有效催化剂.

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