Characteristics of the photocatalytic reactor with an annular array of glass tubes surrounding a light source(2)kinetic analysis
Characteristics of the photocatalytic reactor with an annular array of glass tubes surrounding a light source(2)kinetic analysis
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光源周围玻璃管环形阵列光催化反应器的特性(2)动力学分析
DOI：
10.11450/seitaikogaku1989.13.2_11
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
F. Shiraishi
中科院分区：
文献类型：
--
作者：
Satoru Fukinbara;F. Shiraishi
在一系列的两篇论文中，对光催化反应器的性能进行了实验和理论研究，其中光源由19个透明玻璃管组成的环形阵列包围，形成一个整体的锯齿形流动路径。在第二篇论文中，利用由6W黑光荧光灯和PYREX玻璃管组成的光催化反应器进行了DNP的光催化分解。本征动力学常数由较高初始反应物浓度下测得的初始反应速率确定，本征吸附平衡常数和传质系数由先前在固定化酶体系中建立的方法确定。将这些参数值应用于间歇、间歇循环和连续流动模式下的光催化反应器体系的各个数学模型中，考虑膜扩散阻力的影响，计算结果与实验值吻合较好，表明了数学模型的有效性。在初始DNP浓度为11.6g·m~3时，有效系数为0.92，表明在本系统中膜扩散阻力的影响不是很大。虽然实验是在间歇-循环反应器系统中进行的，但理论分析的结果表明，目前的反应条件可以近似视为间歇反应条件。在固定化酶体系中提出的方法可用于确定本征光催化反应器体系的本征动力学参数和传质系数。
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 11.6 g 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.