多相光化学反应器的辐射能传递模型

RADIANT ENERGY TRANSFER MODEL IN MULTIPHASE PHOTOCHEMICAL REACTORS

以双通量模型为基础模拟多相光化学反应器中的辐射能传递行为 ,考虑透过光催化剂颗粒的光子总数修正了双通量模型 ,采用比较简单的模型说明了多相光化学反应器内量纲 1光辐射能分布和光催化剂的量纲 1吸收光子总数分布 ,举例讨论了半导体超细粉末二氧化钛为光催化剂的气固相光化学反应器在不同光催化剂粒径、不同反应器厚度条件下反应器内量纲 1光辐射能分布和光催化剂的量纲

On the basis of the two-flux model of radiative transfer in photochemical reactor, the model was extended by considering light transmission passing through the photocatalyst, and light was reflected and absorbed by the photocatalyst in the plane parallel-plate reactor. The extended model shows the dimensionless radiation intensity distribution and the dimensionless total radiative energy absorption rate in heterogeneous photoreactor. Semiconductor ultrafine TiO2 power was widely used as the photocatalyst in heterogeneous photochemical reactor for environmental control. In order to show the usefulness of this simple method, the effects of TiO2 power diameter and reactor depth on the dimensionless radiation intensity distribution and on the dimensionless total radiative energy absorption rate in gas-solid heterogeneous photocatalytic reactor were illustrated. The model explains that it is necessary to select reasonable reactor depth, particle diameter and density on semiconductor heterogeneous photoreactor designed.