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Catalysts 2015, 5(2), 718-746; doi:10.3390/catal5020718

Abatement of VOCs with Alternate Adsorption and Plasma-Assisted Regeneration: A Review

Department of Applied Physics, Research Unit Plasma Technology, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41, B-9000 Ghent, Belgium
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Academic Editor: Jean-François Lamonier
Received: 26 February 2015 / Revised: 3 April 2015 / Accepted: 9 April 2015 / Published: 23 April 2015
(This article belongs to the Special Issue Catalytic Removal of Volatile Organic Compounds)
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Abstract

Energy consumption is an important concern for the removal of volatile organic compounds (VOCs) from waste air with non-thermal plasma (NTP). Although the combination of NTP with heterogeneous catalysis has shown to reduce the formation of unwanted by-products and improve the energy efficiency of the process, further optimization of these hybrid systems is still necessary to evolve to a competitive air purification technology. A newly developed innovative technique, i.e., the cyclic operation of VOC adsorption and NTP-assisted regeneration has attracted growing interest of researchers due to the optimized energy consumption and cost-effectiveness. This paper reviews this new technique for the abatement of VOCs as well as for regeneration of adsorbents. In the first part, a comparison of the energy consumption between sequential and continuous treatment is given. Next, studies dealing with adsorption followed by NTP oxidation are reviewed. Particular attention is paid to the adsorption mechanisms and the regeneration of catalysts with in-plasma and post-plasma processes. Finally, the influence of critical process parameters on the adsorption and regeneration steps is summarized. View Full-Text
Keywords: non-thermal plasma; volatile organic compound; plasma-catalysis; adsorption; regeneration non-thermal plasma; volatile organic compound; plasma-catalysis; adsorption; regeneration
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Sultana, S.; Vandenbroucke, A.M.; Leys, C.; De Geyter, N.; Morent, R. Abatement of VOCs with Alternate Adsorption and Plasma-Assisted Regeneration: A Review. Catalysts 2015, 5, 718-746.

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