A Mass Transfer Model for Devolatilization of Highly Viscous Media in Rotating Packed Bed  

作　　者：李沃源 毋伟 邹海魁 初广文 邵磊 陈建峰 

机构地区：[1]Research Center of the Ministry of Education for High Gravity Engineering and Technology, College of ChemicalEngineering, Beijing University of Chemical Technology, Beijing 100029, China

出　　处：《Chinese Journal of Chemical Engineering》2010年第2期194-201,共8页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China（20821004 20990221）; the National High Technology Research and Development Program of China（2006AA030202）; the Program for New Century Excellent Talents in University of China（NCET-07-0053）; the National Basic Research Program of China（2009CB219903）

摘　　要：A mass transfer model for devolatilization process of highly viscous media in rotating packed bed(RPB) was developed based on penetration theory and mass conservation.Before establishing the model,some mass transfer experiments of thin film were conducted in a designed diffusion cell including vacuum and feeding system. In this study,acetone was used as the volatile organic compound(VOC) and syrup as the highly viscous media.The thickness of thin film was changed by using different liquid distributor.It was found that bubbling played an important role in the devolatilization.The correlation of diffusion coefficient of acetone in highly viscous dilute solution was proposed.The relative error between predicted and experimental data was within the range of ± 30% for diffusion coefficient of acetone in syrup.A comparison of experimental data of RPB with model indicated that the relative error was within ± 30% for efficiency of acetone removal.A mass transfer model for devolatilization process of highly viscous media in rotating packed bed（RPB） was developed based on penetration theory and mass conservation.Before establishing the model,some mass transfer experiments of thin film were conducted in a designed diffusion cell including vacuum and feeding system. In this study,acetone was used as the volatile organic compound（VOC） and syrup as the highly viscous media.The thickness of thin film was changed by using different liquid distributor.It was found that bubbling played an important role in the devolatilization.The correlation of diffusion coefficient of acetone in highly viscous dilute solution was proposed.The relative error between predicted and experimental data was within the range of ± 30% for diffusion coefficient of acetone in syrup.A comparison of experimental data of RPB with model indicated that the relative error was within ± 30% for efficiency of acetone removal.

关 键 词：mass transfer highly viscous liquid volatile organic compound diffusion coefficient rotating packed bed 

分 类 号：TQ028.8[化学工程] TQ352.72