TiO_(2)光催化选择性还原氮氧化物的应用研究进展

Progress on TiO_(2) photo-catalytic selective reduction of nitrogen oxide

氮氧化物是空气污染物中的主要成分,目前通过以V_(2)O_(5)为主的催化剂进行选择性催化还原来控制烟气中氮氧化物的排放,该催化剂具有脱硝效率高、适用范围广的特点,但是低温活性低、运行能耗高。二氧化钛(TiO_(2))光催化选择性还原技术是一种可在中低温下将氮氧化物转化为氮气的绿色方法,具有广阔的应用前景。综述了TiO_(2)光催化技术在还原氮氧化物领域的现状及发展动态,以及增强TiO_(2)光催化材料体系光催化效率的途径,并对目前光催化选择性还原氮氧化物技术的研究方向提出了可行性建议。

Nitrogen oxides(NO_(x))are the main components of air pollutants.Selective catalytic reduction method is wildly applied to control the nitrogen oxides(NO_(x))emission in flue gas with V_(2)O_(5)own to high denitrification and wide usage.But it also has the disadvantages of low low-temperature activity and high energy consumption.Photo-catalytic selective reduction of NO_(x)is an environmentally friendly treatment process for purifying flue gas with TiO_(2),which utilizes light to convert NO_(x)into N2 under middle and low temperature.The advantages of high low-temperature activity and low energy consumption make it have broad application prospects.The recent advances in photo-catalytic reduction of NO_(x)and the ways improve the efficiency were reviewed.And some suggestions on the current development direction of photo-catalytic selective reduction NO_(x)technology were put forward.