Analytic versus CFD approach for kinetic modeling of gas phase photocatalysis

摘要: In this work two methods for determining the Langmuir–Hinshelwood kinetic parameters a slit-shaped flat bed photocatalytic reactor are compared: an analytic mass transfer based model adapted from literature and computational fluid dynamics (CFD) approach that was used in conjunction with simplex optimization routine. Despite differences between both approaches, similar values trends terms of their UV intensity dependence were found. Using effectiveness-NTU (number units) approach, method could quantify relative contributions rate limiting steps through reaction effectiveness parameter. The numeric CFD on other hand yield determine simultaneously. Furthermore, it proved to be more accurate as accounts spatial variation flow rate, concentrations at surface photocatalyst. We elaborate dual analysis regard degradation acetaldehyde air over silicon wafer coated layer TiO2 P25 (Evonik) study usefulness limitations strategies.