Photocatalytic degradation of H 2 S in the gas-phase using a continuous flow reactor coated with TiO 2 -based acrylic paint.

Autor: Lied EB; a Department of Biological and Environmental Sciences, Federal University of Technology - Paraná , Medianeira , Brazil.; b Postgraduate Program of Chemical Engineering, West Paraná State University , Toledo , Brazil., Morejon CFM; b Postgraduate Program of Chemical Engineering, West Paraná State University , Toledo , Brazil., Basso RLO; c Center for Natural Sciences, Federal University for Latin American Integration , Foz do Iguaçu , Brazil., Trevisan AP; d Postgraduate Program of Agricultural Engineering, West Paraná State University , Cascavel , Brazil., Bittencourt PRS; e Department of Chemistry, Federal University of Technology - Paraná , Medianeira , Brazil., Fronza FL; a Department of Biological and Environmental Sciences, Federal University of Technology - Paraná , Medianeira , Brazil.
Jazyk: angličtina
Zdroj: Environmental technology [Environ Technol] 2019 Jul; Vol. 40 (17), pp. 2276-2289. Date of Electronic Publication: 2018 Feb 26.
DOI: 10.1080/09593330.2018.1440010
Abstrakt: For the photocatalytic degradation of the hydrogen sulphide (H 2 S) in the gas-phase it was developed a rectangular reactor, coated with acrylic paint supported on fiber cement material. The surface formed by the paint coverage was characterized structural and morphologically by scanning electron microscopy with energy dispersive X-ray and X-ray diffraction analysis. The flow rate and the inlet concentration of H 2 S were evaluated as operational performance parameters of the reactor. Removal efficiencies of up to 94% were obtained at a flow rate of 2 L min -1 (residence time of 115 s) and inlet concentration of 31 ppm of H 2 S. In addition, the H 2 S degradation kinetics was modelled according to the Langmuir-Hinshelwood (L-H) model for the inlet concentrations of 8-23 ppm of H 2 S. The results suggest that flow rate has a more important influence on photocatalytic degradation than the inlet concentration. It is assumed that H 2 S has been oxidized to SO 4 2 - , a condition that led to a deactivation of the photocatalyst after 193 min of semi-continuous use.
Databáze: MEDLINE
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