Process Characteristics and Scale-Up of Rotating-Disk-Reactor for Photocatalysis
Date Issued
2007
Date
2007
Author(s)
CHang, Chih-Yi
DOI
en-US
Abstract
Rotating-disk-reactor (RDR) has been received much attention in photocatalysis, which not only avoids the difficult separated process between TiO2 and solution, but would be expected to possess better performance even than the suspension photocatalytic reactors.
Three main objectives of this work are to be noted. Firstly, we investigated the process characteristics of RDR on degrading methyl orange (MO) by combining the kinetics model and fluid dynamics model we proposed. The results show that the conversion of MO was up to 55% within 1.6s of retention time. With disk rotating: (1) The photocatalytic reaction rate was greatly improved by light penetration only through the micro-scale liquid film. (2) The mass transfer rate was increased significantly and the reaction is shifted to the photocatalytic reaction rate limitation region. Secondly, the intrinsic mechanism of photocatalytic reaction have been presented and simulated. Last but not least, the possibility of scale-up is discussed in our research. Based on our model, the optimal condition of photocatalytic process could be simply attained by calibrating several parameters, including flow rate, rotating speed, disk size and light intensity.
Subjects
二氧化鈦
旋轉反應器
甲基橙
光降解反應
TiO2
Rotating-disk-reactor
Methyl orange
Photocatalysis
Adcanced Oxidation Process
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-96-R94524024-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):cfd86c3dae5d7e6b006972cb445339c4