Removal of formaldehyde by a pulsed dielectric barrier discharge in dry air in the 20 °C to 300 °C temperature range. (14th April 2016)

• Record Type: Journal Article
• Authors: Blin-Simiand, N; Pasquiers, S; Magne, L
• Is Part Of: Journal of physics. Volume 49:Number 19(2016)
• Publication Date: 2016-04-14
• Subjects: formaldehyde -- dielectric barrier discharge -- non-thermal plasma kinetics -- volatile organic compounds -- environmental application; Physics -- Periodicals; 530
• DOI: 10.1088/0022-3727/49/19/195202
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: The influence of the gas mixture temperature, from 20 °C up to 300 °C, on the removal of formaldehyde, diluted at low concentration (less than 800 ppm) in dry air at atmospheric pressure, by a pulsed dielectric barrier discharge (DBD) is studied by means of Fourier transform infrared spectroscopy and micro gas chromatography. Efficient removal of CH2 O is obtained and it is found that the characteristic energy, less than 200 J l −1, is a decreasing function of the temperature over the whole range of concentration values under consideration. Byproducts issued from the removal are identified and quantified (CO, CO2, HCOOH, HNO3 ). Experimental results are analysed using a zero-dimensional simplified DBD-reactor model in order to gain insights on the chemical processes involved. It is shown that the dissociation of the molecule competes with oxidation reactions at low temperature, whereas at high temperature oxidation processes dominate.