Pseudohomogeneous model for a heterogeneous packed bed photocatalytic oxidation reactor
- Arizona State Univ., Tempe, AZ (United States)
A pseudohomogeneous model with a two-flux irradiance submodel was developed to simulate photocatalytic oxidation of dilute VOCs in air in an annular packed bed reactor. The two-flux model shows that four dimensionless groups control the magnitude of the UV irradiance profile and the integrated UV absorption in the packed bed. These parameters are directly related to reactor and packing dimensions, catalyst coating thickness and optical constants. A reasonable agreement was found between model-predicted light flux at the outer reactor wall and experimental values without adjusting any submodel parameters. The reactor model predictions for acetone conversion agree well with experimental measurements using a laboratory scale packed bed reactor. The model suggests that radial gradients in UV flux leads to significant reaction rate and concentration gradients, which ultimately limit reactor performance. 8 refs., 2 figs.
- OSTI ID:
- 430573
- Report Number(s):
- CONF-960730--
- Country of Publication:
- United States
- Language:
- English
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