| Fe3+强化NaClO2溶液脱硝过程研究 |
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| 引用本文： | 何雷晶,武斌,陈葵,周晓葵,曹鹏.Fe3+强化NaClO2溶液脱硝过程研究[J].化工环保,2019,39(6):653-659. |
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| 作者姓名： | 何雷晶 武斌 陈葵 周晓葵 曹鹏 |
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| 作者单位： | 华东理工大学 化工学院,上海,200237;四川龙蟒钛业股份有限公司,四川 绵竹,618200 |
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| 基金项目： | 上海市科委项目（18595800900） |
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| 摘 要： | 以NaClO_2-Fe~(3+)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:Fe~(3+)能够显著提高NaClO_2的氧化活性,1.0 mmol/L NaClO_2溶液加入0.10 mmol/L Fe~(3+)后即可达到5.0 mmol/L NaClO_2溶液不加Fe~(3+)时的脱硝水平;在NaClO_2浓度1.0 mmol/L、Fe~(3+)浓度0.10 mmol/L、吸收液初始pH 3.75、反应温度60 ℃、液气比8 L/m~3的优化工艺条件下处理NO 140 mg/m~3的进气,NO氧化率和NO_x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ClO_2;反应消耗的NaClO_2与NO的摩尔比为1.06。通过补加消耗的NaClO_2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。
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| 关 键 词： | 铁离子催化 亚氯酸钠 脱硝 氧化 |
| 收稿时间： | 2019-04-25 |
Study on process of denitrification with Fe3+-enhanced NaClO2 solution |
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| HE Leijing,WU Bin,CHEN Kui,ZHOU Xiaokui,CAO Peng.Study on process of denitrification with Fe3+-enhanced NaClO2 solution[J].Environmental Protection of Chemical Industry,2019,39(6):653-659. |
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| Authors: | HE Leijing WU Bin CHEN Kui ZHOU Xiaokui CAO Peng |
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| Affiliation: | 1. School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;2. Sichuan Lomon Titanium Industry Co. Ltd,Mianzhu 618200,China |
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| Abstract: | 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. |
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| Keywords: | ferric ion catalysis sodium chlorite denitrification oxidation |
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