CAJ | 학술논문

在半间歇式鼓泡床反应器中进行了过硫酸钠工艺同时氧化吸收燃煤烟气中NO和SO2的研究。研究了过硫酸钠浓度、溶液温度、NO初始浓度、SO2初始浓度对体系NO脱除的影响。结果表明,随着Na2 S2 O8溶液浓度的增加,NO脱除率呈现先增加后变化不大的趋势,0.2 mol/L均为单独脱硝和同时脱硫脱硝的最佳浓度。随着溶液温度的提高、NO初始浓度的降低,NO脱除率显著增加。在所有实验条件下,SO2脱除率均在95%以上。 SO2对NO的脱除具有双重作用,一定浓度的SO2,在较低温度范围内,对NO的脱除表现为增强效应,随着温度的升高,增强效应逐渐减弱,在较高温度范围内,转为抑制作用。 SO4·-和OH·活性自由基与液相中NO和SO2的相对比例变化是引起NO脱除率变化的根本原因,实验条件的变化直接或间接的改变了这一比例,导致NO脱除率发生变化。
재반간헐식고포상반응기중진행료과류산납공예동시양화흡수연매연기중NO화SO2적연구。연구료과류산납농도、용액온도、NO초시농도、SO2초시농도대체계NO탈제적영향。결과표명,수착Na2 S2 O8용액농도적증가,NO탈제솔정현선증가후변화불대적추세,0.2 mol/L균위단독탈초화동시탈류탈초적최가농도。수착용액온도적제고、NO초시농도적강저,NO탈제솔현저증가。재소유실험조건하,SO2탈제솔균재95%이상。 SO2대NO적탈제구유쌍중작용,일정농도적SO2,재교저온도범위내,대NO적탈제표현위증강효응,수착온도적승고,증강효응축점감약,재교고온도범위내,전위억제작용。 SO4·-화OH·활성자유기여액상중NO화SO2적상대비례변화시인기NO탈제솔변화적근본원인,실험조건적변화직접혹간접적개변료저일비례,도치NO탈제솔발생변화。
The initial study on simultaneous absorption and oxidation of NO and SO2 from coal-fired flue gas by aqueous solutions of sodium persulfate( Na2 S2 O8 ) has been studied in a bubble column reactor op-erated in semibatch mode. The effects of Na2 S2 O8 concentration,temperature,the NO concentration,SO2 concentration on NO removal has been investigated. The result showed that along with the increasing of the Na2 S2 O8 concentration,the NO conversion increased first and then smooth after Na2 S2 O8 concentration turns to 0. 2 mol/L and 0. 2 mol/L is also the best concentration for aqueous NO removal,both in the presence and absence of SO2 . As temperature raising and decreasing of the NO concentration,the conver-sion of NO has dramatically growth. SO2 can be almost removed entirely in each conditions. With presence of the SO2 ,NO conversion can shows different performance. When temperature within a low area,NO con-version can be strengthen by the presence of the SO2 ,however,when temperature goes high,two conditions begin to be the same and finally shows the opposite result. The changing proportion of the existence of SO4 ·-,OH· and SO2 ,NO in liquid are the mainly reason of the NO converting variation and the different condition of the experiment directly or indirectly change the proportion and then cause the difference of the NO conversion ultimately.