Plasma-assisted removal of methanol in N<sub>2</sub>, dry and humidified air using a dielectric barrier discharge (DBD) reactor

Dahiru, Usman H.; Saleem, Faisal; Zhang, Kui; Harvey, Adam P.

doi:10.1039/d2ra01097f

Cited by 9 publications

(1 citation statement)

References 55 publications

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“…Heterogeneous photocatalysis involves the absorption of photons by a semiconductor with an energy equal to or greater than that of the band gap (E c − E v ), facilitating the flow of electrons from the valence band (E v ) to the conduction band (E c ) [12,13]. This process generates a positive hole (h+) at the valence band and releases an electron (e−) into the conduction band [14,15].…”

Section: Introductionmentioning

confidence: 99%

Kinetic Modeling of the Photocatalytic Degradation of Chlorinated Aromatic Volatile Organic Compounds: Mass Transfer Enhancement

Koné,

Assadi,

Belkessa

et al. 2024

Applied Sciences

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Chlorobenzene (CB) and Chloronaphthalene (CN) emissions from cement plant operations pose significant environmental risks. This study investigates the mass transfer effects of chlorinated aromatic Volatile Organic Compounds (VOCs), specifically CB and CN, in the gas phase of a continuous-tangential-flow annular photocatalytic reactor. The experiments involved introducing CB and CN into the reactor, and the degradation kinetics were analyzed using the Langmuir–Hinshelwood (L-H) model. The L-H model was applied to assess the impact of the flow rate, concentration, and relative humidity (% RH) on the degradation rate (DR). The results indicate that both the experimental and simulated degradation rates improved with increased flow rates (1 to 9 m3·h−¹) and inlet concentrations (30 to 216 mg·m−3). This enhancement of the DR correlates with the availability of active OH* species on the TiO2 surface. The L-H model emphasizes the role of H2O molecules in VOC removal kinetics. The degradation rates increased with a rising water content (5 to 55%), but adverse effects on VOC conversion were observed beyond a 55% RH. This study reveals a mass transfer effect, with internal diffusional limitations in the TiO2 pores under operational conditions. The kinetics were predominantly controlled by chemical kinetics and catalyst pore availability. Furthermore, this study demonstrates a higher CB degradation than CN in the reactor and experimental conditions. For a concentration of 1.328 mM·m−3, the CB DR ranged from 0.70 to 2.84 µM·m2·s−¹, as the flow rate varied from 1 to 9 m3·h−¹. The CN DR varied from 0.60 to 2.20 µM·m2·s−¹ within the same flow rate range.

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Section: Introductionmentioning

confidence: 99%

Kinetic Modeling of the Photocatalytic Degradation of Chlorinated Aromatic Volatile Organic Compounds: Mass Transfer Enhancement

Koné,

Assadi,

Belkessa

et al. 2024

Applied Sciences

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Oxidative removal of hexane from the gas stream by dielectric barrier discharge reactor and effect of gas environment

Dahiru

Saleem

Al-Sudani

et al. 2022

Chemical Engineering and Processing - Process Intensification

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Opportunities for process intensification using non-thermal plasmas

Harvey

Ibrahim

Dahiru

et al. 2023

Current Opinion in Chemical Engineering

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Plasma-assisted removal of methanol in N₂, dry and humidified air using a dielectric barrier discharge (DBD) reactor

Abstract: The removal of methanol from ambient air is carried out using a non-thermal plasma dielectric barrier discharge reactor.

Cited by 9 publications

References 55 publications

Kinetic Modeling of the Photocatalytic Degradation of Chlorinated Aromatic Volatile Organic Compounds: Mass Transfer Enhancement

Kinetic Modeling of the Photocatalytic Degradation of Chlorinated Aromatic Volatile Organic Compounds: Mass Transfer Enhancement

Oxidative removal of hexane from the gas stream by dielectric barrier discharge reactor and effect of gas environment

Opportunities for process intensification using non-thermal plasmas

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Plasma-assisted removal of methanol in N2, dry and humidified air using a dielectric barrier discharge (DBD) reactor

Abstract: The removal of methanol from ambient air is carried out using a non-thermal plasma dielectric barrier discharge reactor.

Cited by 9 publications

References 55 publications

Kinetic Modeling of the Photocatalytic Degradation of Chlorinated Aromatic Volatile Organic Compounds: Mass Transfer Enhancement

Kinetic Modeling of the Photocatalytic Degradation of Chlorinated Aromatic Volatile Organic Compounds: Mass Transfer Enhancement

Oxidative removal of hexane from the gas stream by dielectric barrier discharge reactor and effect of gas environment

Opportunities for process intensification using non-thermal plasmas

Contact Info

Product

Resources

About

Plasma-assisted removal of methanol in N₂, dry and humidified air using a dielectric barrier discharge (DBD) reactor