REMOVAL OF NITROGEN MONOXIDE FROM EXHAUST GASES THROUGH NOVEL CATALYTIC PROCESSES
REMOVAL OF NITROGEN MONOXIDE FROM EXHAUST GASES THROUGH NOVEL CATALYTIC PROCESSES
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DOI：
10.1016/0920-5861(91)80074-j
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发表时间：
1991-08-30
期刊：
影响因子：
5.3
通讯作者：
Hamada, Hideaki
中科院分区：
文献类型：
--
作者：
Iwamoto, Masakazu;Hamada, Hideaki
汽车发动机和工业锅炉排放的废气中含有大量有害的一氧化氮(NO)，会造成空气污染和酸雨。为了脱除NO，目前已经采用了NH3或CO催化还原工艺，但仍有一些问题有待解决。人们普遍认为，催化分解是脱除NO的最好方法，但一直没有找到对该反应具有持续高活性的催化剂。本文介绍了分解催化剂的现状，并根据作者的研究结果总结了铜离子交换沸石和Ag-Co3O4氧化物等催化剂的催化性能。并提出了铜沸石上的分解反应机理。在最后一节中，介绍了新开发的脱除NO的催化过程--烃类在氧气存在下的催化还原NO。这里报告的观察结果表明，在实践中可以使用催化分解和/或还原，而不是目前的还原过程。
The exhaust gas from vehicle engines and industrial boilers contains considerable amount of harmful nitrogen monoxide (NO) which causes air pollution and acid rain. To remove NO, at present, catalytic reduction processes using NH3 or CO have been applied, but several problems remain to be solved. It is widely accepted that catalytic decomposition is the best method for the removal of NO; however, the catalyst with consistently high activity for the reaction has never been found. In this paper the present position of decomposition catalysts is mentioned and the catalytic performance of copper ion-exchanged zeolites and Ag-Co3O4 oxides etc. is summarized based on the respective authors' results. A reaction mechanism of the decomposition is also proposed on the Cu-zeolites. In the last section the catalytic reduction of NO by hydrocarbons in the presence of oxygen, the newly developed catalytic process for removal of NO, has been introduced. The observations reported here suggest that the catalytic decomposition and/or reduction may be used in practice instead of the present reduction processes.