| Summary: | 碩士 === 國立臺灣大學 === 化學工程學研究所 === 95 === 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.
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