TY - JOUR ID - 981 TI - Three-dimensional simulation of microcapillary and microchannel photo reactors for organic pollutant degradation from contaminated water using computational fluid dynamics JO - Advances in Environmental Technology JA - AET LA - en SN - 2476-6674 AU - Behineh, Elham Sadat AU - Solaimany Nazar, Ali Reza AU - Farhadian, Mehrdad AU - Rabanimehr, Fayazeh AD - Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran Y1 - 2019 PY - 2019 VL - 5 IS - 4 SP - 229 EP - 237 KW - Microcapillary KW - Microchannel KW - Photocatalytic degradation KW - Langmuir–Hinshelwood KW - CFD DO - 10.22104/aet.2020.4036.1203 N2 - A three-dimensional (3D) simulation of four photocatalytic microreactors is performed using mass and momentum balance equations. The simulated results are validated with the available experimental data for the photocatalytic removal of methylene blue (MB) in two microcapillaries as well as dimethylformamide (DMF) and salicylic acid (SA) in two microchannels. In the surface layers of the microreactor, a photo removal reaction takes place, and the kinetic rates are described by the Langmuir-Hinshelwood (L-H) model. The Damköhler number for these microreactors is less than one, which indicates that the mass transfer rate is limited by the reaction rate. The numerical study and kinetic constants determination are carried out by using computational fluid dynamic techniques. The 3D modelpredictionsare ingood agreementwith the availableexperimental data sets. The results of the parametric study show that by increasing the microreactor length from 50 to 90mm, the removal efficiency improves from 76% to 93%. Moreover, the removal rate is increased by about 40% by reducing the microchannel depth from 500 to 100 . UR - https://aet.irost.ir/article_981.html L1 - https://aet.irost.ir/article_981_9af3e3d1d5f1e5d3cb2f577243dbc024.pdf ER -