Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (08): 1979-1984.doi: 10.3866/PKU.WHXB20110802

• PHOTOCHEMISTRY AND RADIATION CHEMISTRY • Previous Articles     Next Articles

Effect of OH Radicals on Formaldehyde Removal in Dielectric Barrier Discharge

SHI Heng-Chao, WANG Wen-Chun, YANG De-Zheng, HUO Yan, JIA Li   

  1. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116024, Liaoning Province, P. R. China
  • Received:2011-01-26 Revised:2011-05-05 Published:2011-07-19
  • Contact: WANG Wen-Chun E-mail:wangwenc@dlut.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (50977006, 10575019), College Scientific Research Program of the Liaoning Education Department, China (2009S017), and Fundamental Research Funds for the Central Universities, China (DUT10JR03).

Abstract:

The removal of formaldehyde by dielectric barrier discharge in a coaxial cylindrical reactor has been studied at atmospheric pressure. The emission spectra of OH (A2ΣX 2Π, 0-0) emitted from the dielectric barrier discharge have been successfully recorded. The relationship between the removal efficiency of formaldehyde and the emission intensity of OH (A2ΣX 2Π, 0-0) has been investigated at different applied voltages, driving frequencies, concentrations of argon and oxygen. We find that the removal efficiency of HCHO increases when the emission intensity of OH (A2ΣX 2Π, 0-0) increases with rising applied voltage, driving frequency, and concentration of argon. However, the removal efficiency of HCHO decreases when the emission intensity of OH (A2ΣX 2Π, 0-0) decreases with an increase in the concentration of oxygen. The removal efficiency of HCHO is 93.8% in N2+HCHO mixed gas at 11.5 kV applied voltage and 9 kHz driving frequency.

Key words: Dielectric barrier discharge, Formaldehyde removal, OH radical, Emission spectrum, Atmospheric pressure

MSC2000: 

  • O644