Photodegradation of Toluene, m-Xylene, and n-Butyl Acetate and Their Mixtures over TiO₂ Catalyst on Glass Fibers

Abstract

The abatement of typical paint solvent compounds as individuals and in mixtures was carried out in an annular TiO 2 supported reactor, for concentrations up to 900 mg C m −3 . Two different fiberglass supports were compared, and the catalyst supported over a fiber mat showed better performance, with a lower pressure drop (>35% of reduction) and a slightly higher removal efficiency (about 2%) than that supported over glass wool. For every target compound in the whole range of relative humidity studied (4−75%), the photocatalytic activity increased with the air water content. The removal of the compounds in the binary and ternary mixtures was depressed, even >90% for toluene, compared with individual tests. Xylene was the main compound responsible for the inhibition effects in the mixtures, followed by toluene and butyl acetate. Photodegradation of individual compound data was well fitted by both simple and bimolecular Langmuir−Hinselwood (LH) kinetic models.

Residence time distribution analysis and kinetic study of toluene photo-degradation using a continuous immobilized photoreactor

“…23,[31][32][33] This model successfully explains the kinetics of reactions that occur between two adsorbed species (a free radical (i.e. 23,[31][32][33] This model successfully explains the kinetics of reactions that occur between two adsorbed species (a free radical (i.e.…”

A review of the influence of humidity on photocatalytic decomposition of gaseous pollutants on TiO2‐based catalysts

“…In this case, increasing humidity is beneficial for a photocatalytic reaction rate because it provides more radical species for the reaction to proceed. [37] + Katsumata et al [38] 2 benzene 1.77(20 C) c 0 2.13 c + Jafari et al [39] Hernandez-Garcia et al [40] Hernandez-Garcia et al [41] Geng et al [42] Sangkhun et al [43] Jo and Yang [44] + Pham et al [45] + W u e t a l [28] Einaga et al [46,47] 3 ethylbenzene 0.161 c 0.59 c 3.15 c + Sangkhun et al [43] Jo and Yang [44] Palau et al [48] Jo and Kim [49] + Cheng et al [20] Chun and Jo [50] 4 perchloroethylene 0.15 b 2.332 c 2.88 c + Jo and Lee [51] + Monteiro et al [52] + Monteiro et al [53] 5 toluene 0.519 c 0.375 c 2.73 c + Sangkhun et al [43] Jo and Yang [44] Chun and Jo [50] Chen et al [54] Jeong et al [55] Sleiman et al [56] Cao et al [57] + Cui et al [58] Chen et al [59] Den and Wang [60] Guo et al [61] Luo and Ollis [62] + Palau et al [48] Dinh et al [63] Park et al [64] Sharmin and Ray [65] Akly et al [66] Guo et al [67] 6 trichloroethylene 1.280 a,b 2.53 c + Jo and Lee [51] Suárez et al [68] Ou and Lo…”

Supported Photocatalyst for Removal of Emerging Contaminants from Wastewater in a Continuous Packed-Bed Photoreactor Configuration

“…However, TiO2 has an important disadvantage because it is in powder form and, therefore, a post-treatment separation stage is needed for its use as photocatalytic material in wastewater decontamination by photocatalytic treatment [18,19]. This is the main reason why it is very useful to test the possibility of supporting the TiO2 active phase on several materials-e.g., activated carbon, silica, glass and polymers-in order for it to be used as photocatalysts in photocatalytic reactors for wastewater decontamination [20][21][22].…”