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<p>This study investigated the effect of key operating parameters, kinetics, and chemical degradation pathways of photocatalytic removal of ethyl acetate (EA) in a novel planar light-emitting diode (LED) reactor. The volatile organic compounds (VOCs) degradation was performed using titanium dioxide (TiO<sub>2</sub>) nanoparticles immobilized on glass fiber tissue (GFT) in a pilot-scale continuous reactor. The performance of elaborated catalyst TiO<sub>2</sub>/GFT was studied through the control of different parameters, such as EA inlet concentration (5, 10, 15, 20&#xa0;mg/m<sup>3</sup>), flow rate (1, 2, 4&#xa0;m<sup>3</sup>/h), relative humidity (5, 50, 90%), air gap (30, 50&#xa0;mm), and LED intensities (15, 48, 95&#xa0;W/m<sup>2</sup>). The exploitation of these parameters allows an understanding of the performance of the novel planar LED reactor, thus the different phenomena involved and the kinetics of the photocatalytic reaction. Monitoring the selectivity of CO<sub>2</sub> enables determination of the reactive oxygen species responsible and the reaction pathways of the photocatalytic degradation of EA. We evaluated the Langmuir–Hinshelwood with the mass transfer approach to obtain the kinetic constants. To get close to the real conditions, a simultaneous removal study was performed on TiO<sub>2</sub>/GFT considering the optimal parameters. Therefore, the photocatalytic activity was followed in the presence of VOCs, EA and bacteria (<i>Escherichia coli</i>).</p>

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Novel planar light-emitting diode reactor design for continuous photocatalytic indoor air remediation

  • 期刊论文

  • 发表日期：

    2026年3月28日

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  • M. A. Hajjaji,
  • Ach. A. Assadi,
  • A. A. Assadi,
  • A. Hajjaji

摘要

This study investigated the effect of key operating parameters, kinetics, and chemical degradation pathways of photocatalytic removal of ethyl acetate (EA) in a novel planar light-emitting diode (LED) reactor. The volatile organic compounds (VOCs) degradation was performed using titanium dioxide (TiO2) nanoparticles immobilized on glass fiber tissue (GFT) in a pilot-scale continuous reactor. The performance of elaborated catalyst TiO2/GFT was studied through the control of different parameters, such as EA inlet concentration (5, 10, 15, 20 mg/m3), flow rate (1, 2, 4 m3/h), relative humidity (5, 50, 90%), air gap (30, 50 mm), and LED intensities (15, 48, 95 W/m2). The exploitation of these parameters allows an understanding of the performance of the novel planar LED reactor, thus the different phenomena involved and the kinetics of the photocatalytic reaction. Monitoring the selectivity of CO2 enables determination of the reactive oxygen species responsible and the reaction pathways of the photocatalytic degradation of EA. We evaluated the Langmuir–Hinshelwood with the mass transfer approach to obtain the kinetic constants. To get close to the real conditions, a simultaneous removal study was performed on TiO2/GFT considering the optimal parameters. Therefore, the photocatalytic activity was followed in the presence of VOCs, EA and bacteria (Escherichia coli).