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Simultaneous Removal of NO x and SO 2 through a Simple Process Using a Composite Absorbent

Author

Listed:
  • Ping Fang

    (South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
    The Key Laboratory of Water and Air Pollution Control of Guangdong Province, Guangzhou 510655, China)

  • Zijun Tang

    (South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China)

  • Xiongbo Chen

    (South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
    The Key Laboratory of Water and Air Pollution Control of Guangdong Province, Guangzhou 510655, China)

  • Peiyi Zhong

    (South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
    The Key Laboratory of Water and Air Pollution Control of Guangdong Province, Guangzhou 510655, China)

  • Jianhang Huang

    (South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China)

  • Zhixiong Tang

    (South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China)

  • Chaoping Cen

    (South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
    The Key Laboratory of Water and Air Pollution Control of Guangdong Province, Guangzhou 510655, China)

Abstract

In this work, the feasibility of the simultaneous removal of NO x and SO 2 through a simple process using a composite absorbent (NaClO 2 /Na 2 S 2 O 8 ) was evaluated. Factors affecting the removal of NO x and SO 2 , such as NaClO 2 and Na 2 S 2 O 8 concentrations, solution temperature, the initial pH of solution, gas flow rate, and SO 2 , NO, and O 2 concentrations were studied, with a special attention to NO x removal. Results indicate that a synergistic effect on NO x removal has been obtained through combination of NaClO 2 and Na 2 S 2 O 8 . NaClO 2 in the solution played a more important role than did Na 2 S 2 O 8 for the removal of NO x . The above factors had an important impact on the removal of NO x , especially the solution temperature, the initial pH of the solution, and the oxidant concentrations. The optimum experimental conditions were established, and a highest efficiency of NO x removal of more than 80% was obtained. Meanwhile, tandem double column absorption experiments were conducted, and a NO x removal efficiency of more than 90% was reached, using NaOH solution as an absorbant in the second reactor. A preliminary reaction mechanism for NO x and SO 2 removal was deduced, based on experimental results. The composite absorbent has the potential to be used in the wet desulfurization and denitration process, to realize the synergistic removal of multi-pollutants.

Suggested Citation

  • Ping Fang & Zijun Tang & Xiongbo Chen & Peiyi Zhong & Jianhang Huang & Zhixiong Tang & Chaoping Cen, 2018. "Simultaneous Removal of NO x and SO 2 through a Simple Process Using a Composite Absorbent," Sustainability, MDPI, vol. 10(12), pages 1-18, November.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:12:p:4350-:d:184772
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    References listed on IDEAS

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    1. Ma, Siming & Zhao, Yongchun & Yang, Jianping & Zhang, Shibo & Zhang, Junying & Zheng, Chuguang, 2017. "Research progress of pollutants removal from coal-fired flue gas using non-thermal plasma," Renewable and Sustainable Energy Reviews, Elsevier, vol. 67(C), pages 791-810.
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    Cited by:

    1. Jaroslav Vrchota & Martin Pech & Ladislav Rolínek & Jiří Bednář, 2020. "Sustainability Outcomes of Green Processes in Relation to Industry 4.0 in Manufacturing: Systematic Review," Sustainability, MDPI, vol. 12(15), pages 1-47, July.
    2. Liguo Song & Yuhang Wei & Chengqi Deng & Jingang Yang & Hao Sui & Feng Guo & Lingrun Meng & Xingda Zhao & Shiping Wei & Deping Sun & Zhitao Han & Minyi Xu & Xinxiang Pan, 2023. "A Novel Method Based on Hydrodynamic Cavitation for Improving Nitric Oxide Removal Performance of NaClO 2," IJERPH, MDPI, vol. 20(4), pages 1-18, February.

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