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Study on NO(2) absorption by ascorbic acid and various chemicals.

Wei Li1, Cheng-Zhi Wu, He-Liang Fang

  • 1Institute of Environmental Engineering, Zhejiang University, Hangzhou 310027, China.

Journal of Zhejiang University. Science. B
|December 21, 2005
PubMed
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Ascorbic acid shows a high nitrogen dioxide (NO2) absorption rate in wet flue gas desulfurization systems. This study identifies it as a promising chemical for enhanced NO2 removal in industrial applications.

Area of Science:

  • Environmental Chemistry
  • Chemical Engineering

Background:

  • Wet flue gas desulfurization (FGD) systems are crucial for reducing industrial emissions.
  • Optimizing chemical absorbents is key to improving the efficiency of NO2 removal in FGD.

Purpose of the Study:

  • To identify an effective chemical absorbent for nitrogen dioxide (NO2) at a pH range of 4.5 to 7.0.
  • To evaluate the absorption performance of ascorbic acid for NO2 in simulated flue gas conditions.

Main Methods:

  • Utilized a double-stirred reactor to study NO2 absorption kinetics.
  • Conducted experiments within a specific pH range (4.5-7.0) and temperature (55°C).

Main Results:

  • Ascorbic acid demonstrated a very high absorption rate for NO2 within the target pH range.

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  • The determined rate constant for the ascorbic acid-NO2 reaction was approximately 3.54 x 10^6 mol/(Ls) at pH 5.4-6.5 and 55°C.

    • Conclusions:

    • Ascorbic acid is a highly effective absorbent for NO2 in the context of wet FGD.
    • Its high absorption rate suggests significant potential for industrial application in improving flue gas treatment.