Anisotropic Scattering Model for Estimation of Light Absorption Rates in Photoreactor with Heterogeneous Medium

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Serap Cesur¹  Yasuyuki Takahata²  Hidetoshi Baba²  Hiroshi Suzuki²  Toshiyuki Yokota² 

[1] Department of Chemical Engineering, Ege University;Department of Materials Science and Engineering, Yamagata University

关键词: Monte Carlo Simulation;    Anisotropic Scattering;    Light Absorption Rate;    Heterogeneous Photoreaction;    Photochemical Reaction Engineering;   

DOI  :  10.1252/jcej.32.314

来源: Maruzen Company Ltd

【 摘 要 】

References(11)Cited-By(12)A statistical approach is still the most effective tool for handling coupled absorbing and scattering phenomena in a heterogeneous system for the assessment of light energy absorption in a photoreactor. A Monte Carlo simulation model has been developed for the prediction of light intensity distribution in a photoreactor. The model has three parameters, an attenuation coefficient, a probability of light ray absorption, and a scattering parameter which specifies the mode of isotropic and/or anisotropic scattering. Experimental measurements of light transmittance and reflectance through solid particle suspensions bounded by two infinite plates were carried out using a newly designed integrating sphere device attached to a spectrophotometer. Light intensity distributions in a rectangular photoreactor with the suspension irradiated by a laser beam were also measured with a photo-probe. These data are compared with simulation results and model parameters are determined to satisfy the experiments. Light absorption fractions measured in the suspensions with different optical lengths show satisfactory agreement with those estimated by the simulation. Thus, the model developed is verified to be effective for the assessment of light absorption rates in a heterogeneous photoreactor.

【 授权许可】

Unknown