Recent progress in air treatment with combined photocatalytic/plasma processes: A review

Lotfi Khezami, Phuong Nguyen-Tri, Wala Abdou Saoud, Abdelkrim Bouzaza, Atef El Jery, D Duc Nguyen, Vijai Kumar Gupta, Aymen Amine Assadi

Research output: Contribution to journalReview articlepeer-review

Abstract

Nowadays, air pollution is an increasingly important topic, as environmental regulations require limiting pollutant emissions. This problem requires new techniques to reduce emissions by either improving the current emission control systems and processes or installing new hybrid treatment systems. These are of broad diversity, and every system has its advantages and disadvantages. The tendency is, accordingly, to combine various techniques to achieve more acceptable and suitable treatment. Recent studies suggest that the combination of photocatalysis and plasma in a reactor can offer attractive pollutant treatment efficiency with a minimum of partially oxidized by-products than that of these processes taken separately. However, there is little review of the capability of this pairing to treat different brands of pollutants. Besides, available data concerning reactor design with flows treated 10 to 1000 times higher than those studied at the lab scale. This review paid particular attention to determine the reaction mechanisms in terms of engineering and design of combination reactors (plasma and catalysis). Likewise, we developed the effect of critical parameters such as pollutant load, relative humidity, and flow rate to understand the degradation kinetics of specific pollutants individually by using plasma and photocatalysis. Additionally, this review compares different designs of cold plasma reactors combination with heterogeneous catalysis with special attention on synergistic and antagonistic effects of using plasma and photocatalysis processes at the laboratory, pilot, and industrial scales. Therefore, the elements discussed in this review stick well to the first theme on pollution prevention of the special issue concerning pollution prevention and the application of clean technologies to promote a circular (bio) economy.

Original languageEnglish
Article number113588
JournalJournal of Environmental Management
Volume299
Early online date3 Sep 2021
DOIs
Publication statusFirst published - 3 Sep 2021

Keywords

  • process extrapolation
  • Air pollution
  • non-thermal plasma
  • photocatalysis
  • synergetic effect

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