Catalytic ozonation of VOCs at low temperature: A comprehensive review

VOCs abatement has attracted increasing interest because of the detrimental effects on both atmospheric envi-ronment and human beings of VOCs. The assistance of ozone has enabled efficient VOCs removal at low tem-perature. Thereby, catalytic ozonation is considered as one of the most feasible and effective methods for VOCs elimination. This work systematically reviews the emerging advances of catalytic ozonation of different VOCs (i. e., aromatic hydrocarbons, oxygenated VOCs, chlorinated VOCs, sulfur-containing VOCs, and saturated alkanes) over various functional catalysts. General reaction mechanism of catalytic ozonation including both Langmuir-Hinshelwood and Mars-van-Krevelen mechanisms was proposed depending on the reactive oxygen species involving the reactions. The influence of reaction conditions (water vapor and temperature) is fully discussed. This review also introduces the enhanced VOCs oxidation via catalytic ozonation in the ozone-generating systems including plasma and vacuum ultraviolet. Lastly, the existing challenges of VOCs catalytic ozonation are pre-sented, and the perspective of this technology is envisioned.

Automated summary

VOCs abatement has attracted increasing interest due to their detrimental effects on the environment and human health. Catalytic ozonation with the assistance of ozone is considered as a feasible and effective method for VOCs elimination. This review systematically reviews the emerging advances of catalytic ozonation of different VOCs and discusses the reaction mechanisms and influencing factors.