关键词: 聚团, 动态尺度, 评估方法, 多相流, 光催化

Abstract:

For the multi-phase fluidization coupling photocatalysis multi-scaled system, it is a hard nut to crack the evaluation of fluidized agglomerates dynamic scale only by the macro/micro-methods, since the fluidized agglomerates are dynamic, multi-scaled distributed, and changed instantaneously. In this case, the evaluation methods for dynamic scale of photocatalytic fluidized agglomerates in multi-phase fluidization were summarized from modern installment detection, mathematic model, and numerical simulation, evaluation and detection methods of bed voidage, etc. The superiority and limitations of these methods in practice were further analyzed. Finally, the creative thought and method of evaluation of fluidized agglomerates dynamic scale in photocatalysis coupling multi-phase fluidization system were put forward as follows. Combining microscopic information and macroscopic parameters in the multi-phase fluidization coupling photocatalysis multi-scaled system, using the key parameters, such as the number of molecules as the correlation index, by introducing the constructed collision probability function and bed voidage distribution function into the photocatalytic reaction kinetics equation containing fluidized agglomerate reactivity characteristic parameters, the novel agglomerate dynamic scale and photocatalytic reactivity integrated model concerning macro- and micro- information could be achieved by substitution method, iterative method, and fitting technology.

Key words: agglomerate, dynamic scale, evaluation method, multi-phase fluidization, photocatalysis