一级连串反应系统灵敏度分析-《郑州大学学报(工学版)》

文章信息/Info

作者:: 徐海升; 杨许召; 赵建宏; 等.; 郑州大学化工学院,河南,郑州,450002, 郑州大学化工学院,河南,郑州,450002, 郑州大学化工学院,河南,郑州,450002, 郑州大学化工学院,河南,郑州,450002, 郑州大学化工学院,河南,郑州,450002

Keywords:: first-order cascade reactions; multi-kettle tandem model; Sensitivity analysis

摘要:: 应用化工系统灵敏度分析的方法,针对等体积串联釜模型描述的以中间生成物为目的产物的一级连串反应Ak1→Rk2→S,研究了速度常数比K变化和操作偏离最佳点对产品收率的影响规律.结果表明:系统回收效率越高,K值变化及操作偏离最佳点对产品收率影响越小;对于回收效率较高的工业连串反应过程,一阶灵敏度系数和二阶灵敏度系数均随串联段数N值的增加而减小,因此,选用PFR时,系统操作灵敏度最低;一、二阶灵敏系数越大,越应该伴随系统参数变化及时准确跟踪最佳点操作,这是保证收率提高的有效途径.

Abstract:: Applying the sensitivity analysis method of chemical system, the influence of velocity constant ratio K and operation deviation from the optimal point on product yield was studied for the first-order series reaction Ak1→Rk2→S described by the equal-volume tandem kettle model. The results show that the higher the recovery efficiency of the system, the less influence of K value change and operation deviation from the optimal point on the product yield. For the industrial serial reaction process with high recovery efficiency, the first-order sensitivity coefficient and second-order sensitivity coefficient decrease with the increase of the N value of the number of tandem segments, so the system operation sensitivity is the lowest when PFR is selected. The larger the first- and second-order sensitivity coefficients, the more accurate it is to track the optimal point operation in time with the change of system parameters, which is an effective way to ensure the improvement of yield.