Removal of formaldehyde by a pulsed dielectric barrier discharge in dry air in the 20 °C to 300 °C temperature range

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 an...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2016-05, Vol.49 (19), p.195202
Main Authors: Blin-Simiand, N, Pasquiers, S, Magne, L
Format: Article
Language:English
Subjects:
dielectric barrier discharge
environmental application
formaldehyde
non-thermal plasma kinetics
Physics
Plasma Physics
volatile organic compounds
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Summary: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 CH2O 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.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/49/19/195202