采用程序升温反应(TPR)技术,对比研究了复合金属氧化物催化剂La0.8K0.2MnO3,La0.9K01CoO3和Cu0.9K0.1Fe2O4同时催化去除柴油机NOx和碳烟(soot)的反应.研究结果表明,La0.8K0.2MnO3催化剂具有显著的同时催化去除NOx-soot催化反应特性,其降低碳烟的燃烧温度活性最强,而选择还原NOx为N2的效率居中.借助等离子体技术辅助La0.8K0.2MnO3,进一步研究了NOx-soot同时催化去除的有效性.结果证明,由于等离子体的作用,提高了La0.8K0.2MnO3同时催化去除NOx-soot的催化反应活性,降低了碳烟燃烧温度,使碳烟起燃温度从300℃降到280℃,最大燃烧点温度从357℃降到335℃,燃尽温度从425℃降到380℃,也提高了NOx转化为N2的效率.
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