Characteristics of the photocatalytic reactor with an annular array of glass tubes surrounding a light source: 2. Kinetic analysis
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- Fukinbara Satoru
- Department of Biochemical Engineering and Science, Faculty of Computer Scien and Systems Engineering, Kyushu Institute of Technology
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- Shiraishi Fumihide
- Department of Biochemical Engineering and Science, Faculty of Computer Scien and Systems Engineering, Kyushu Institute of Technology
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Description
In a series of two papers, the performance of a photocatalytic reactor, where a light source is surrounded by an annular array of 19 transparent glass tubes, giving a zigzag-flow path as a whole, has been studied both experimentally and theoretically. In this second paper, the photocatalytic reactor, constituted by a 6-W blacklight fluorescent lamp and Pyrex glass tubes, has been used to carry out the photocatalytic decomposition of DNP. The intrinsic kinetic constant was determined from the initial reaction rate that were measured at high initial reactant concentrations and the intrinsic adsorption equilibrium constant and mass-transfer coefficient were determined by the methods previously established in an immobilized-enzyme system. The result calculated by applying these parameter values to each mathematical model, taking into consideration the effect of film-diffusional resistance, for the photocatalytic reactor system operating in a batch, batch-recirculation, or continuous-flow mode was in good agreement with the experimental values, which indicates the validity of the mathematical models. At an initial DNP concentration of 11.6g m3, the effectiveness factor was 0.92, showing that the effect of film-diffusional resistance is not so high in the present system. Although the experiment was carried out in the batch-recirculation reactor system, the result of theoretical analysis indicated that the present reaction condition can be approximately regarded as the batch reaction condition. The method previously proposed in an immobilized-enzyme system were found to be useful to determine the intrinsic kinetic parameters and mass-transfer coefficient in the present photocatalytic reactor system.
Journal
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- Eco-Engineering
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Eco-Engineering 13 (2), 11-23, 2001
The Society of Eco-Engineering
