中文摘要：

随着氮氧化物（NOx）对人类活动及环境影响的日趋严重,如何控制烟气中氮氧化物的产生及减少其排放量成为越来越关注的焦点问题。文中主要介绍了其中的选择性催化还原法（SCR）、非选择性催化还原法（SNCR）的原理、优缺点及最新进展,最后对控制氮氧化物排放的潜在研究方向和研究前景进行了展望。

英文摘要：

The effect of nitrogen oxides （NOx ） on environment and human activities became worse, so how to control the generation of NOx in flue gas and reduce its emissions became the focus of people. The principles and characteristics of various technologies and existing problems were illustrated, in addition, the potential research direction and prospects to control NOx emissions were put forward.