Computer-aided scale-up of a packed-bed tubular reactor

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• 作者：Woohyun Kim^a ; Choamun Yun^b ; Ki Taeg Jung^c ; Sunwon Park^a ; ^{sunwon@kaist.ac.kr} ; Sae Heon Kim^c
• 关键词：Design ; Scale-up ; Packed-bed tubular reactor ; CFD ; Heat exchanger design software ; Process modeling software
• 刊名：Computers and Chemical Engineering
• 出版年：2012
• 期刊代码：35_00981354
• 类别：et
• 出版时间：6 April, 2012
• 卷：39
• 期：Complete
• 页码：96-104
• 文件大小：2181 K

摘要

Temperature control is crucial when designing a catalytic tubular reactor for exothermic reactions because hot spots in packed-bed tubes affect conversion, selectivity and lifespan of catalysts. To resolve the hot spot problem, a computer-aided scale-up method combining process modeling software, heat exchanger design software and computational fluid dynamics (CFD) analysis is proposed. The proposed method is composed of three steps as follows: firstly, the length and the number of tubes are determined to achieve a target production rate by the simulations of a single-tube reactor model. Secondly, the detailed geometry of a scaled-up reactor comprising multiple tubes is determined using heat exchanger design software. Finally, optimal operating conditions to control the hot spots are designated by CFD analysis. As a practical application, the method is applied to scaling up the single-tube reactor producing epichlorohydrin to a demonstration-scale reactor comprising 200 tubes so its optimal design and operating conditions are determined.