摘要
以NaClO2-Fe3+为复合吸收剂,在填料吸收塔中进行了脱硝实验。实验结果表明:Fe3+能够显著提高NaClO2的氧化活性,1.0 mmol/L NaClO2溶液加入0.10 mmol/L Fe3+后即可达到5.0 mmol/L NaClO2溶液不加Fe3+时的脱硝水平;在NaClO2浓度1.0 mmol/L、Fe3+浓度0.10 mmol/L、吸收液初始pH 3.75、反应温度60℃、液气比8 L/m3的优化工艺条件下处理NO 140 mg/m3的进气,NO氧化率和NOx脱除率分别达到92.63%和83.62%。脱硝前后吸收液组成的测定结果表明:起主要脱硝作用的是ClO2;反应消耗的NaClO2与NO的摩尔比为1.06。通过补加消耗的NaClO2可达同样的脱硝效果,循环3次后吸收液中的有效成分基本稳定。
The denitration experiment was carried out in a packed absorption tower with NaClO2-Fe3+as a composite absorbent.The experimental results show that:Fe3+could significantly increase the oxidation activity of NaClO2;the denitration effect of 1.0 mmol/L NaClO2 solution with 0.10 mmol/L Fe3+was equal to that of 5.0 mmol/L NaClO2 solution without Fe3+;When the feed gas with NO concentration of 140 mg/m3 was treated under the optimized process conditions of NaClO2 concentration 1.0 mmol/L,Fe3+concentration 0.10 mmol/L,initial absorbent pH 3.75,reaction temperature 60℃and liquid-gas ratio 8 L/m3,the NO oxidation rate reached 92.63%and the NOx removal rate reached 83.62%.By determining the components of the absorbing liquid before and after denitration,it is indicated that ClO2 is the principal component for denitrification,and the molar ratio of the consumed NaClO2 to NO is 1.06.The equal denitration effect can be achieved by supplementing the consumption of NaClO2,and the active ingredient in the absorption liquid remained substantially stable after 3 times of reuse.
作者
何雷晶
武斌
陈葵
周晓葵
曹鹏
HE Leijing;WU Bin;CHEN Kui;ZHOU Xiaokui;CAO Peng(School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;Sichuan Lomon Titanium Industry Co.Ltd,Mianzhu 618200,China)
出处
《化工环保》
CAS
CSCD
北大核心
2019年第6期653-659,共7页
Environmental Protection of Chemical Industry
基金
上海市科委项目(18595800900)
关键词
铁离子催化
亚氯酸钠
脱硝
氧化
ferric ion catalysis
sodium chlorite
denitrification
oxidation
