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NO Removal from Simulated Flue Gas with a NaClO 2 Mist Generated Using the Ultrasonic Atomization Method

Author

Listed:
  • Zhitao Han

    (Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian 116026, China)

  • Dongsheng Zhao

    (Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian 116026, China)

  • Dekang Zheng

    (Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian 116026, China)

  • Xinxiang Pan

    (Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian 116026, China)

  • Bojun Liu

    (Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian 116026, China)

  • Zhiwei Han

    (Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian 116026, China)

  • Yu Gao

    (Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian 116026, China)

  • Junming Wang

    (Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian 116026, China)

  • Zhijun Yan

    (Marine Engineering College, Dalian Maritime University, No.1, Linghai Road, Dalian 116026, China)

Abstract

In order to enhance the mass transfer efficiency between gas–liquid interfaces, NaClO 2 mist generated by an ultrasonic humidifier was used to remove NO from simulated flue gas. The effects of some key parameters (the gas flow rate, the NaClO 2 concentration in the solution, the inlet NO concentration, the NaClO 2 solution pH) on NO removal efficiency were investigated preliminarily. The results showed that NaClO 2 mist could oxidize NO with a much higher efficiency compared with other mists containing either NaClO or H 2 O 2 as oxidants. With an increase in the gas flow rate from 1.5 to 3.0 L·min −1 , the atomizing rate of the NaClO 2 solution increased almost linearly from 0.38 to 0.85 mL·min −1 . When the gas flow rate was 2.0 L·min −1 , a complete removal of NO had been reached. NO removal efficiency increased obviously with an increase in the NaClO 2 concentration in the solution. With an increase in the inlet NO concentration, the ratio of NO in the flue gas and NaClO 2 in the mist increased almost linearly. Furthermore, the NaClO 2 mist exhibited a relatively stable and high NO x removal efficiency in a wide pH range (4–11) of NaClO 2 solutions. The reason for the high NO removal efficiency was mainly ascribed to both the strong oxidative ability of NaClO 2 and the improved mass transfer at the gas-liquid interface.

Suggested Citation

  • Zhitao Han & Dongsheng Zhao & Dekang Zheng & Xinxiang Pan & Bojun Liu & Zhiwei Han & Yu Gao & Junming Wang & Zhijun Yan, 2018. "NO Removal from Simulated Flue Gas with a NaClO 2 Mist Generated Using the Ultrasonic Atomization Method," Energies, MDPI, vol. 11(5), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:5:p:1043-:d:142994
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    References listed on IDEAS

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    1. Jinxi Zhou & Song Zhou & Yuanqing Zhu, 2017. "Characterization of Particle and Gaseous Emissions from Marine Diesel Engines with Different Fuels and Impact of After-Treatment Technology," Energies, MDPI, vol. 10(8), pages 1-14, July.
    2. Xiang Gou & Yating Wang & Chunfei Wu & Shian Liu & Dong Zhao & Yamei Li & Saima Iram, 2017. "Low Temperature Selective Catalytic Reduction Using Molding Catalysts Mn-Ce/FA and Mn-Ce/FA-30%TiO 2," Energies, MDPI, vol. 10(12), pages 1-14, December.
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    Cited by:

    1. Pijian Gong & Xinxue Li, 2019. "Promoting Effect of H + and Other Factors on NO Removal by Using Acidic NaClO 2 Solution," Energies, MDPI, vol. 12(15), pages 1-11, August.

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