Journal
CHEMOSPHERE
Volume 308, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2022.136481
Keywords
Non-thermal plasma (NTP); Volatile organic compounds (VOCs); Chlorinated volatile organic compounds (Cl-VOCs); By-products; Mechanism; In situ characterisation
Categories
Funding
- UK Engineering and Physical Sciences Research Council (EPSRC) [EP/V036696/1, EP/S017127/1]
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This review summarizes state-of-the-art research on the plasma catalysis of VOCs degradation, focusing on catalyst design, deep catalytic degradation strategies, and mechanism research. Special attention is given to the degradation of Cl-VOCs, and future challenges and opportunities are discussed.
Most of the volatile organic compounds (VOCs) and especially the chlorinated volatile organic compounds (Cl-VOCs), are regarded as major pollutants due to their properties of volatility, diffusivity and toxicity which pose a significant threat to human health and the eco-environment. Catalytic degradation of VOCs and Cl-VOCs to harmless products is a promising approach to mitigate the issues caused by VOCs and Cl-VOCs. Non-thermal plasma (NTP) assisted catalysis is a promising technology for the efficient degradation of VOCs and Cl-VOCs with higher selectivity under relatively mild conditions compared with conventional thermal catalysis. This review summarises state-of-the-art research of the in plasma catalysis (IPC) of VOCs degradation from three major aspects including: (i) the design of catalysts, (ii) the strategies of deep catalytic degradation and by-products inhibition, and (iii) the fundamental research into mechanisms of NTP activated catalytic VOCs degradation. Particular attention is also given to Cl-VOCs due to their characteristic properties of higher stability and toxicity. The catalysts used for the degradation Cl-VOCs, chlorinated by-products formation and the degradation mechanism of Cl-VOCs are systematically reviewed in each chapter. Finally, a perspective on future challenges and opportunities in the development of NTP assisted VOCs catalytic degradation were discussed.
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