SCI和EI收录∣中国化工学会会刊

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 Kang1,2,3,4, Xiaoxun Ma1,2,3,4, Jian'an Yin1,5, Xuchun Gao1,2,3,4   

  1. 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 Kang1,2,3,4, Xiaoxun Ma1,2,3,4, Jian'an Yin1,5, Xuchun Gao1,2,3,4   

  1. 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: 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