Boosting VOCs elimination by coupling different techniques

Rebecca El Khawaja, Savita Kaliya Perumal Veerapandian, Rim Bitar, Nathalie De Geyter, Rino Morent, Nicolas Heymans, Guy De Weireld, Tarek Barakat, Yang Ding, Grêce Abdallah, Shilpa Sonar, Axel Löfberg, Jean Marc Giraudon, Christophe Poupin, Renaud Cousin, Fabrice Cazier, Dorothée Dewaele, Paul Genevray, Yann Landkocz, Clémence MéausooneNour Jaber, Dominique Courcot, Sylvain Billet, Jean François Lamonier, Bao Lian Su, Stéphane Siffert

Research output: Contribution to journalReview articlepeer-review

Abstract

Volatile Organic Compounds (VOCs) are known to be hazardous and harmful to human health and the environment. In mixtures or during repeated exposures, significant toxicity of these compounds in trace amounts has been revealed. In vitro air-liquid interface approaches underlined the interest in evaluating the impact of repeated VOC exposure and the importance of carrying out a toxicological validation of the techniques in addition to the standard chemical analyses. The difficulties in sampling and measuring VOCs in stationary source emissions are due to both the complexity of the mixture present and the wide range of concentrations. The coupling of VOC treatment techniques results in efficient systems with lower operating energy consumption. Three main couplings are outlined in this review, highlighting their advantages and relevance. First, adsorption-catalysis coupling is particularly valuable by using adsorption and catalytic oxidation regeneration initiated, for example, by selective dielectric heating. Then, several key aspects of the plasma catalysis process, such as the choice of catalysts suitable for the non-thermal plasma (NTP) environment, the simultaneous removal of different VOCs, and the in situ regeneration of the catalyst by NTP exposure, are discussed. The adsorption-photocatalysis coupling technology is also one of the effective and promising methods for VOC removal. The VOC molecules strongly adsorbed on the surface of the photocatalyst can be directly oxidized by the photogenerated hole on the photocatalyst (e.g., TiO2).
Original languageEnglish
JournalChemical Synthesis
Volume2
Issue number2
DOIs
Publication statusPublished - 29 Jun 2022

Keywords

  • adsorption materials
  • catalysis
  • coupling techniques
  • photocatalysis
  • plasma
  • VOC removal

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