甲烷选择催化还原NO研究进展

 近十年来，甲烷选择催化还原NOx已引起各国环境研究工作者的关注．综述了近年来甲烷选择催化还原NOx方面的研究进展，着重分析了用于该反应的催化剂的研究状况，探讨了目前比较公认的甲烷选择催化还原NOx的反应机理（NO2机理），详细介绍了目前催化剂用于提高甲烷DeNOx反应活性的方法；并展望了甲烷选择催化还原NOx今后的研究方向．

Advances in Selective Catalytic Reduction of NO with Methane

The removal of nitrogen monoxide from combustion exhaust gas is recognized as one of the most important and urgent targets in catalysis research. In the last decade, the utilization of hydrocarbons as reducing agents has received much attention for the selective catalytic reduction (SCR) of nitric oxide. Using CH 4 as the reducing agent for SCR of NO x has particularly attracted interest, owing to the fact that methane exists in nearly all of the combustion exhausts. This paper summarized the advance in SCR of NO x with methane in recent years. The status of the catalysts for CH 4 SCR of NO x including metal exchanged zeolites and metal oxides was also introduced. The reaction mechanism was also discussed, and it was indicated that the formation of NO 2 was the key step for CH 4 SCR of NO x . Combining with our own research work, we briefly described the methods and techniques used for improving the catalyst activity. The methods used to improve the catalyst activity can be divided into two sides. One is the melioration of catalyst preparation, the other is to add some additives in the catalysts. For the new techniques used in CH 4 SCR of NO x , we put our stress on the microwave. At last, we forecasted the difficulties for CH 4 SCR of NO x and the research direction we should strive in the future.