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Related Experiment Videos

Microwave plasma conversion of volatile organic compounds.

Youngsam Ko1, Gosu Yang, Daniel P Y Chang

  • 1Department of Civil and Environmental Engineering, Chonbuk National University, Chonju, Korea.

Journal of the Air & Waste Management Association (1995)
|May 31, 2003
PubMed
Summary

This study shows a microwave plasma torch can destroy volatile organic compounds (VOCs) in gas streams. Adding steam improved destruction efficiency without generating hazardous byproducts.

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Area of Science:

  • Environmental Science
  • Chemical Engineering
  • Plasma Physics

Background:

  • Volatile organic compounds (VOCs) pose environmental and health risks.
  • Adsorbent technology is effective for VOC removal but requires regeneration.
  • Plasma technology offers a potential method for direct VOC destruction.

Purpose of the Study:

  • To assess the technical feasibility of using a microwave plasma torch for VOC destruction.
  • To investigate byproduct formation during plasma treatment of VOCs.
  • To evaluate the synergy between plasma treatment and steam-assisted desorption.

Main Methods:

  • Operation of a microwave-induced steam/Ar/O2 plasma torch at atmospheric pressure.
  • Introduction of trichloroethene (TCE) and toluene (TOL) as model VOCs.

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  • Analysis of post-plasma gas samples using gas chromatography and sorbent tube collection for byproduct identification.

    • Main Results:

    • Microwave power of 500-600 W effectively destroyed TCE and TOL down to gas chromatograph detection limits.
    • Sufficient oxygen addition prevented the formation of undesirable byproducts.
    • The addition of steam to the gas flow enhanced VOC destruction efficiency.

    Conclusions:

    • Microwave plasma torches are technically feasible for destroying VOCs in gas streams.
    • The process can be integrated with adsorbent technology, using steam for desorption.
    • Careful control of oxygen levels and steam addition is crucial for efficient and safe VOC destruction.