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用于乙酸环己酯生产的新型反应精馏工艺：设计、优化与控制

Novel Reactive Distillation Process for Cyclohexyl Acetate Production: Design, Optimization, and Control.

作者信息

Hu Yabo, Wang Le, Lu Jiawei, Ding Lianghui, Zhang Guowen, Zhang Zhuxiu, Tang Jihai, Cui Mifen, Chen Xian, Qiao Xu

机构信息

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, PR China.

School of Environmental Engineering, Nanjing Institute of Technology, Nanjing, Jiangsu 211167, China.

出版信息

ACS Omega. 2023 Mar 30;8(14):13192-13201. doi: 10.1021/acsomega.3c00469. eCollection 2023 Apr 11.

DOI:10.1021/acsomega.3c00469
PMID:37065013
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10099445/
Abstract

A side-reactor column (SRC) configuration, comprising a vacuum column coupled with atmospheric side reactors, is proposed to overcome the thermodynamic restriction in the esterification of cyclohexene with acetic acid to produce cyclohexyl acetate. Meantime, this configuration can avoid the utilization of the high-pressure steam and provide enough zone for catalyst loading. In order to obtain the minimum total annual cost (TAC), the process is optimized by a mixed-integer nonlinear programming optimization method based on the improved bat algorithm. The results indicate that the optimized SRC configuration saves about 44.81% of the TAC compared to the reactive distillation process. Based on the optimized SRC process, dynamic control is carried out. The dual-point temperature and temperature-composition control structures are proposed to reject throughput and feed composition disturbances. The dynamic performances demonstrate that the temperature-composition control structure is better in maintaining product purity.

摘要

提出了一种侧反应器塔（SRC）配置，其包括与常压侧反应器相连的真空塔，以克服环己烯与乙酸酯化生产乙酸环己酯过程中的热力学限制。同时，这种配置可以避免使用高压蒸汽，并为催化剂装填提供足够的空间。为了获得最低年度总成本（TAC），采用基于改进蝙蝠算法的混合整数非线性规划优化方法对该工艺进行了优化。结果表明，与反应精馏工艺相比，优化后的SRC配置可节省约44.81%的TAC。基于优化后的SRC工艺，进行了动态控制。提出了双点温度和温度-组成控制结构来抑制产量和进料组成干扰。动态性能表明，温度-组成控制结构在维持产品纯度方面表现更好。

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