A CFD Study on Optimization of Mass Transfer and Light Distribution in a Photocatalytic Reactor with Immobilized Photocatalyst on Spheres

被引:5
作者
Jamil, Qasim [1 ]
Rana, Khush Bakhat [2 ]
Matoh, Lev [1 ]
机构
[1] Univ Ljubljana, Fac Chem & Chem Technol, Vecna Pot 113, Ljubljana 1000, Slovenia
[2] Univ Ljubljana, Fac Mech Engn, Askerceva Cesta 6, Ljubljana 1000, Slovenia
关键词
photocatalysis; reactor design optimization; AOPs; CFD analysis; glass beads; ORGANIC CONTAMINANTS; WATER-TREATMENT; THIN-FILM; DEGRADATION; OXIDATION; FLOW; KINETICS; PROGRESS; DESIGN;
D O I
10.3390/w16131828
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This study explores the influence of flow velocity, sphere size, and inter-sphere distance on hydrodynamics and mass transfer in a photocatalytic reactor. The effects of two different light configurations on light distribution and degradation were also evaluated. A 2D computational fluid dynamics (CFD) model was developed to simulate the continuous flow photocatalytic reactor with TiO2-coated spheres and validated with experimental measurements by observing the degradation of methyl orange. The experimental setup consists of a tube containing an equal number of TiO2-coated glass spheres. The case with radiation from one wall shows a non-uniform light distribution compared with the case with radiation from both walls. The CFD simulations focused on analyzing the velocity streamlines and turbulence characteristics (turbulent kinetic energy (TKE) and turbulence dissipation rate (TDR)). These parameters showed significant variations in each studied case. The case with larger spheres reached the highest velocity of 38 m/s of the pollutant solution. The highest TKE and TDR values of 0.47 m2/s2 and 12.2 m2/s2, respectively, were also observed in the same case, indicating enhanced mixing and mass transfer to the catalyst surfaces, ultimately leading to a more efficient degradation process. The results show that an optimized design of photocatalytic reactors can significantly improve mass transfer and, thus, degradation efficiency.
引用
收藏
页数:13
相关论文
共 38 条
[1]   Adsorptive removal of antibiotics from water and wastewater: Progress and challenges [J].
Ahmed, Mohammad Boshir ;
Zhou, John L. ;
Ngo, Huu Hao ;
Guo, Wenshan .
SCIENCE OF THE TOTAL ENVIRONMENT, 2015, 532 :112-126
[2]   Phenol degradation of waste and stormwater on a flat plate photocatalytic reactor with TiO2 on glass slide: An experimental and modelling investigation [J].
Ahmed, S. ;
Rasul, M. G. ;
Sattar, M. A. ;
Jahirul, M. I. .
JOURNAL OF WATER PROCESS ENGINEERING, 2022, 47
[3]   The degradation of an azo dye in a batch slurry photocatalytic reactor [J].
Akyol, Abdurrahman ;
Bayramoglu, Mahmut .
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 2008, 47 (12) :2150-2156
[4]   Mass transfer phenomenon in photocatalytic cascade disc reactor: Effects of artificial roughness and flow rate [J].
Amiri, Hamid ;
Ayati, Bita ;
Ganjidoust, Hossein .
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 2017, 116 :48-59
[5]   Detoxification of water and wastewater by advanced oxidation processes [J].
Babu, D. Syam ;
Srivastava, Vartika ;
Nidheesh, P. V. ;
Kumar, M. Suresh .
SCIENCE OF THE TOTAL ENVIRONMENT, 2019, 696
[6]   CFD simulation of a pilot scale slurry photocatalytic reactor and design of multiple-lamp reactors [J].
Boyjoo, Yash ;
Ang, Ming ;
Pareek, Vishnu .
CHEMICAL ENGINEERING SCIENCE, 2014, 111 :266-277
[7]   Experimental investigation of turbulent flows through a boulder array placed on a permeable bed [J].
Cao, Hui ;
Ye, Chen ;
Yan, Xu-Feng ;
Liu, Xing-Nian ;
Wang, Xie-Kang .
WATER SUPPLY, 2020, 20 (04) :1281-1293
[8]   Comprehensive multiphysics modeling of photocatalytic processes by computational fluid dynamics based on intrinsic kinetic parameters determined in a differential photoreactor [J].
Casado, Cintia ;
Marugan, Javier ;
Timmers, Ruud ;
Munoz, Marcos ;
van Grieken, Rafael .
CHEMICAL ENGINEERING JOURNAL, 2017, 310 :368-380
[9]   Remediation of antibiotic wastewater by coupled photocatalytic and persulfate oxidation system: A critical review [J].
Chen, Guanyi ;
Yu, Yang ;
Liang, Lan ;
Duan, Xiaoguang ;
Li, Rui ;
Lu, Xukai ;
Yan, Beibei ;
Li, Ning ;
Wang, Shaobin .
JOURNAL OF HAZARDOUS MATERIALS, 2021, 408
[10]   Recent developments in photocatalytic water treatment technology: A review [J].
Chong, Meng Nan ;
Jin, Bo ;
Chow, Christopher W. K. ;
Saint, Chris .
WATER RESEARCH, 2010, 44 (10) :2997-3027