Continuous air purification by front flow photocatalytic reactor: Modelling of the influence of mass transfer step under simulated real conditions - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemosphere Année : 2022

Continuous air purification by front flow photocatalytic reactor: Modelling of the influence of mass transfer step under simulated real conditions

Résumé

In this work, a solution for the treatment of toxic gases based on a photocatalytic process using TiO(2) coated on a cellulosic support, has been investigated. Here, cyclohexane was chosen as the reference for testing its removal efficiency via a continuous front flow reactor as type A anti-gas filters. The photocatalytic support was firstly characterized by EDX, to confirm its elemental composition. Then, the experiments were carried out, starting with a batch reactor in order to evaluate the degradation efficiency of the photocatalytic media, as well as the monitoring of the photocatalytic process which allowed the establishing of a carbon mass balance corresponding to the stoichiometric number of our target pollutant. The transition to a continuous treatment with a front flow reactor aims to highlight the influence of the input concentration (0.29-1.78 mM m(-3)) under different flow rates (12, 18 and 36 L min(-1)). The relative humidity effect was also investigated (from 5 to 90% of humidity) where an optimum rate was obtained around 35-45%. In addition, the mineralization rate was monitored. The major rates obtained were for a cyclohexane input concentration of 0.29 mM m(-3) in wet condition (38%) at an air flow rate of 18 L min(-1), where the CO(2) selectivity reached 77% for an abatement of 62%. In order to understand the limiting steps of the photocatalytic process, a model considering the reactor geometry and the hydraulic flow was developed. The obtained results showed that the mass transfer must be considered in the photocatalytic process for a continuous treatment. The Langmuir-Hinshelwood bimolecular model was also developed to represent the influence of the humidity.
Fichier principal
Vignette du fichier
manuscript.pdf (737.8 Ko) Télécharger le fichier
Supporting information.pdf (453.43 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03594101 , version 1 (22-03-2022)

Identifiants

Citer

Youcef Serhane, Nacer Belkessa, Abdelkrim Bouzaza, Dominique Wolbert, Aymen Amin Assadi. Continuous air purification by front flow photocatalytic reactor: Modelling of the influence of mass transfer step under simulated real conditions. Chemosphere, 2022, 295, pp.133809. ⟨10.1016/j.chemosphere.2022.133809⟩. ⟨hal-03594101⟩
27 Consultations
167 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More