A study on simultaneous removal of NO and SO2 by using sodium persulfate aqueous scrubbing

doi:10.1016/j.cjche.2018.02.026

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (7): 1536-1544.DOI: 10.1016/j.cjche.2018.02.026

• Energy, Resources and Environmental Technology • Previous Articles Next Articles

A study on simultaneous removal of NO and SO₂ by using sodium persulfate aqueous scrubbing

Xue Kang^1,2,3,4, Xiaoxun Ma^1,2,3,4, Jian'an Yin^1,5, Xuchun Gao^1,2,3,4

1 School of Chemical Engineering, Northwest University, Xi'an 710069, China;
2 Chemical Engineering Research Center of the Ministry of Education(MOE) for Advanced Use Technology of Shanbei Energy, Xi'an 710069, China;
3 Shaanxi Research Center of Engineering Technology for Clean Coal Conversion, Xi'an 710069, China;
4 International Scientific and Technological Cooperation Base of the Ministry of Science and Technology(MOST) for Clean Utilization of Hydrocarbon Resources, Xi'an 710069, China;
5 Xi'an Shaangu Power Co., Ltd., Xi'an 710075, China

Received:2017-12-06 Revised:2018-02-13 Online:2018-08-16 Published:2018-07-28
Contact: Xiaoxun Ma,E-mail addresses:maxym@nwu.edu.cn;Jian'an Yin,E-mail addresses:yinjianan0359@163.com
Supported by:
Supported by the National Natural Science Foundation of China (21536009), Science and Technology Plan Projects of Shaanxi Province (2017ZDCXL-GY-10-03).

A study on simultaneous removal of NO and SO₂ by using sodium persulfate aqueous scrubbing

Xue Kang^1,2,3,4, Xiaoxun Ma^1,2,3,4, Jian'an Yin^1,5, Xuchun Gao^1,2,3,4

1 School of Chemical Engineering, Northwest University, Xi'an 710069, China;
2 Chemical Engineering Research Center of the Ministry of Education(MOE) for Advanced Use Technology of Shanbei Energy, Xi'an 710069, China;
3 Shaanxi Research Center of Engineering Technology for Clean Coal Conversion, Xi'an 710069, China;
4 International Scientific and Technological Cooperation Base of the Ministry of Science and Technology(MOST) for Clean Utilization of Hydrocarbon Resources, Xi'an 710069, China;
5 Xi'an Shaangu Power Co., Ltd., Xi'an 710075, China

通讯作者: Xiaoxun Ma,E-mail addresses:maxym@nwu.edu.cn;Jian'an Yin,E-mail addresses:yinjianan0359@163.com
基金资助:
Supported by the National Natural Science Foundation of China (21536009), Science and Technology Plan Projects of Shaanxi Province (2017ZDCXL-GY-10-03).

Abstract

Abstract: Nitric oxide (NO) removal and sulfur dioxide (SO₂) removal by sodium persulfate (Na₂S₂O₈) were studied in a Bubble Column Reactor. The proposed reaction pathways of NO and SO₂ removal are discussed. The effects of temperatures (35-90℃), Na₂S₂O₈ (0.05-0.5 mol·L^-1), FeSO₄ (0.5-5.0 m mol·L^-1) and H₂O₂ (0.25 mol·L^-1) on NO and SO₂ removal were investigated. The results indicated that increased persulfate concentration led to increase in NO removal at various temperatures. SO₂ was almost completely removed in the temperature range of 55-85℃. Fe²⁺ accelerated persulfate activation and enhanced NO removal efficiency. At 0.2 mol·L^-1 Na₂S₂O₈ and 0.5-1.0 mmol·L^-1 Fe²⁺, NO removal of 93.5%-99% was obtained at 75-90℃, SO₂ removal was higher than 99% at all temperatures. The addition of 0.25 mol·L^-1 H₂O₂ into 0.2 mol·L^-1 Na₂S₂O₈ solution promoted NO removal efficiency apparently until utterly decomposition of H₂O₂, the SO₂ removal was as high as 98.4% separately at 35℃ and 80℃.

Key words: Simultaneous removal of NO and SO₂, Sodium persulfate, Ferrous sulfate, Hydrogen peroxide, Active radicals

摘要： Nitric oxide (NO) removal and sulfur dioxide (SO₂) removal by sodium persulfate (Na₂S₂O₈) were studied in a Bubble Column Reactor. The proposed reaction pathways of NO and SO₂ removal are discussed. The effects of temperatures (35-90℃), Na₂S₂O₈ (0.05-0.5 mol·L^-1), FeSO₄ (0.5-5.0 m mol·L^-1) and H₂O₂ (0.25 mol·L^-1) on NO and SO₂ removal were investigated. The results indicated that increased persulfate concentration led to increase in NO removal at various temperatures. SO₂ was almost completely removed in the temperature range of 55-85℃. Fe²⁺ accelerated persulfate activation and enhanced NO removal efficiency. At 0.2 mol·L^-1 Na₂S₂O₈ and 0.5-1.0 mmol·L^-1 Fe²⁺, NO removal of 93.5%-99% was obtained at 75-90℃, SO₂ removal was higher than 99% at all temperatures. The addition of 0.25 mol·L^-1 H₂O₂ into 0.2 mol·L^-1 Na₂S₂O₈ solution promoted NO removal efficiency apparently until utterly decomposition of H₂O₂, the SO₂ removal was as high as 98.4% separately at 35℃ and 80℃.

关键词: Simultaneous removal of NO and SO₂, Sodium persulfate, Ferrous sulfate, Hydrogen peroxide, Active radicals

Xue Kang, Xiaoxun Ma, Jian'an Yin, Xuchun Gao. A study on simultaneous removal of NO and SO₂ by using sodium persulfate aqueous scrubbing[J]. Chin.J.Chem.Eng., 2018, 26(7): 1536-1544.

Xue Kang, Xiaoxun Ma, Jian'an Yin, Xuchun Gao. A study on simultaneous removal of NO and SO₂ by using sodium persulfate aqueous scrubbing[J]. Chinese Journal of Chemical Engineering, 2018, 26(7): 1536-1544.

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A study on simultaneous removal of NO and SO₂ by using sodium persulfate aqueous scrubbing

A study on simultaneous removal of NO and SO₂ by using sodium persulfate aqueous scrubbing

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