微波辐照活性炭床烟气脱硝实验研究  

Experimental Studies of Flue Gas Denitrification Using Microwave Irradiation over Activated Carbon

作　　者：马双忱[1] 金鑫[1] 姚娟娟[1] 靳义净[1] 张博[1] 董松[1] 石荣雪[1] 

机构地区：[1]华北电力大学环境科学与工程学院,保定071003

出　　处：《化学学报》2011年第18期2179-2184,共6页Acta Chimica Sinica

基　　金：国家自然科学基金(No.50976035)资助项目

摘　　要：微波诱导催化作用结合活性炭的吸附和还原能力可以实现烟气中氮氧化物的还原脱除.利用微波反应器开展了微波辐照活性炭烟气脱硝实验,研究了微波辐照功率(反应温度)、烟气流率、NO浓度以及烟气共存成分对脱硝效率的影响.实验结果表明,微波功率越高,脱硝效率也越高,在560 W可达80%左右的脱硝效率;活性炭质量越大脱硝反应越完全,50 g活性炭可脱除83%的NO;烟气流率增加脱硝效率降低;烟气中氧的存在对脱硝有一定促进作用,烟气含湿量过大对脱硝不利.脱硝反应动力学研究表明,NO的反应级数近似为1,速率常数为k=1.33 min-1.BET测试表明,微波辐照活性炭后其表面积有少量下降.Nitrogen oxides can be removed through microwave induced catalysis combined with the ad-sorption and reduction of activated carbon.Flue gas denitrification using microwave reactor was carried out,the effects of microwave irradiation power（reaction temperature）,flow rate of flue gas,concentrations of objective pollutants and flue gas coexistence compositions on the removal performance of nitrogen oxides were studied.The results show that,the higher microwave power,the higher denitrification efficiency,up to 80% of the denitrification efficiency under the power of 560 W is achieved;higher amount of activated car-bon,more complete denitrification reaction,83% of the NOx can be removed under the amount of 50 g acti-vated carbon;NOx removal efficiency decreases with increasing flow rate of flue gas;presence of oxygen in flue gas enhances the removal of NO,and too high moisture content is harmful to the denitrification effi-ciency.Kinetic study shows that the order of NO reaction approximates to 1.0,and rate constant is 1.33 min-1.It is seen that the surface area could decrease as microwave irradiation from the results of BET measurement.

关 键 词：微波 活性炭 烟气脱硝 实验研究 

分 类 号：X701[环境科学与工程—环境工程]