| AVS 60th International Symposium and Exhibition | |
| Advanced Surface Engineering | Thursday Sessions |
| Session SE+PS-ThM |
| Session: | Pulsed Plasmas in Surface Engineering (8:00-10:00 am)/Atmospheric Pressure Plasmas (10:40 am-12:00 pm) |
| Presenter: | G. Arnoult, Université Libre de Bruxelles, Belgium |
| Authors: | G. Arnoult, Université Libre de Bruxelles, Belgium T. Bierber, Université Libre de Bruxelles, Belgium A. Ozkan, Université Libre de Bruxelles, Belgium P. De Keyzer, Université Libre de Bruxelles, Belgium F.A.B. Reniers, Université Libre de Bruxelles, Belgium |
| Correspondent: | Click to Email |
Because of its high thermodynamical stability, carbon dioxide is usually considered as a waste, unavoidable end-product of many industrial processes. It is therefore necessary to develop technologies able to reuse it. In this objective, dry reforming of carbon dioxide by plasma has attracted significant interest to generate carbon monoxide which has an interesting energetic value [1], [2].
We present here a study of the plasma assisted conversion of CO2 into CO and O2 in a Dielectric Barrier Discharge plasma device operating at atmospheric pressure. We focus on determining the influence of several parameters on the conversion efficiency: the input power, the flow rate and finally the use or not of an additional plasmagen gas (argon or helium) in the mixture. Gas chromatography and mass spectrometry at atmospheric pressure are used to determine the composition of the gas after plasma treatment. Conversion rates for CO2 can then be extracted.
The conversion rate increases with the power, suggesting an effect of the electron density (Fig.1 and Fig.2). On the other hand, the conversion rate drops with increasing flow rate from 0.1 L/min to 10 L/min. Indeed since the flow rate is inversely proportional to the residence time of the gas in the reactor, increasing it means that the gas spends less time in the plasma. Furthermore the addition of a plasmagen gas increases the conversion rate.
Optical emission spectroscopy and electrical measurements are also performed in order to have a better comprehension of the physical and chemical processes leading to the observed results.
[1] R. Li, Q. Tang, S. Yin, et T. Sato, « Plasma catalysis for CO2 decomposition by using different dielectric materials », Fuel Processing Technology, vol. 87, no 7, p. 617–622, 2006.
[2] S. Paulussen, B. Verheyde, X. Tu, C. De Bie, T. Martens, D. Petrovic, A. Bogaerts, et B. Sels, « Conversion of carbon dioxide to value-added chemicals in atmospheric pressure dielectric barrier discharges », Plasma Sources Science and Technology, vol. 19, p. 034015, 2010.