title: CFD modeling of a UV-LED photocatalytic odor abatement process in a continuous reactor.
abstract: This paper presents a model study of a UV light-emitting-diode (UV-LED) based photocatalytic odor abatement process. It integrated computational fluid dynamics (CFD) modeling of the gas flow in the reactor with LED-array radiation field calculation and Langmuir-Hinshelwood reaction kinetics. It was applied to simulate the photocatalytic degradation of dimethyl sulfide (DMS) in a UV-LED reactor based on experimentally determined chemical kinetic parameters. A non-linear power law relating reaction rate to irradiation intensity was adopted. The model could predict the steady state DMS concentration profiles by calculating the advection, diffusion and Langmuir-Hinshelwood reaction kinetics. By affecting the radiation intensity and uniformity, the position of the LED array relative to the catalyst appeared to be a critical parameter determining DMS removal efficiency. Too small distances might yield low quantum efficiency and consequently poor abatement performance. This study provided an example of LED-based photocatalytic process modeling and gave insights into the optimization of light source design for photocatalytic applications.
authors.affiliation: Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
authors.forename: Zimeng
authors.initials: Z
authors.lastname: Wang
authors.forename: Jing
authors.initials: J
authors.lastname: Liu
authors.forename: Yuancan
authors.initials: Y
authors.lastname: Dai
authors.forename: Weiyang
authors.initials: W
authors.lastname: Dong
authors.forename: Shicheng
authors.initials: S
authors.lastname: Zhang
authors.forename: Jianmin
authors.initials: J
authors.lastname: Chen
mesh_terms: D002384:Catalysis; D057446:Hydrodynamics; D008962:Models, Theoretical; D009812:Odorants; D010777:Photochemistry; D013440:Sulfides / Q000737:chemistry* / Q000528:radiation effects; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D013440:Sulfides; C009495:titanium dioxide; D014025:Titanium; C004784:dimethyl sulfide