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

Catalysts

Sharmin Sultana¹  Arne M. Vandenbroucke²  Christophe Leys²  Nathalie De Geyter²  Rino Morent² 

[1] Department of Applied Physics, Research Unit Plasma Technology, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41, B-9000 Ghent, Belgium;

关键词: non-thermal plasma;    volatile organic compound;    plasma-catalysis;    adsorption;    regeneration;   

DOI  :  10.3390/catal5020718

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.