Plasma Chemistry and Plasma Processing

, Volume 30, Issue 6, pp 841–853 | Cite as

Hydroxyl Radicals Formation in Dielectric Barrier Discharge During Decomposition of Toluene

  • Xiao-bin Liao
  • Yu-fang Guo
  • Jian-hua He
  • Wei-jian Ou
  • Dai-qi Ye
Original Paper
First Online:
Received:
Accepted:

Abstract

A method based on high performance liquid chromatography (HPLC), has been developed to measure hydroxyl radical (·OH) in plasma reactors. The determination was performed indirectly by detecting the products of the reaction of ·OH with salicylic acid (SAL). The applicability, and effect of time, specific input energy (SIE), relative humidity (RH), catalyst were investigated. It was found that 3 h was the optimal trapping time; concentration of ·OH was (5.9–23.6) × 1013 radicals/cm3 at SIE range. The highest ·OH yield and toluene removal efficiency (η) were achieved with a RH of 20%. With MnO x , η was two times that without catalyst, while ·OH yield in gas stream was one-sixth that without catalyst. However, if summed with ·OH adsorbed on catalyst surface, the total ·OH yield was the same as without catalyst. Experiments performed with/without toluene allowed to determine the role of ·OH on decomposition of toluene in air plasma.

Keywords

Hydroxyl radical HPLC Salicylic acid DBD Toluene removal 
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Notes

Acknowledgments

This work was supported by the Doctoral Program of Higher Specialized Research Fund (20070561042); National High Technology Research and Development Program of China (No. 2006AA06A310), the National Natural Science Foundation of China (No. 50978103, No. 50708021), the Guangzhou University Xinmiao Project (No. gyf1-1001), and the Guangzhou University Scientific Research Startup Project (No. gyf1-1002). In addition, key laboratory of environmental protection and eco-remediation of Guangdong regular higher education institutions was gratefully acknowledged.

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Xiao-bin Liao
    • 1
  • Yu-fang Guo
    • 2
  • Jian-hua He
    • 2
  • Wei-jian Ou
    • 2
  • Dai-qi Ye
    • 1
  1. 1.College of Environmental Science and EngineeringSouth China University of TechnologyGuangzhouChina
  2. 2.Guangzhou Higher Education Mega Center, College of Environmental Science and EngineeringGuangzhou UniversityGuangzhouChina

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