Model-Based Optimization of Semibatch Emulsion Polymerization of Styrene

被引:6
作者
Schultz, Eduardo S. [1 ,2 ]
Sheibat-Othman, Nida [1 ]
Mitsos, Alexander [2 ,3 ]
Mhamdi, Adel [2 ]
机构
[1] Univ Lyon 1, Univ Lyon, Lab Automat & Genie Proc LAGEPP, CPE Lyon,CNRS,UMR 5007, Villeurbanne, France
[2] Rhein Westfal TH Aachen, Proc Syst Engn AVT SVT, D-52074 Aachen, Germany
[3] JARA Soft, D-52056 Aachen, Germany
基金
欧盟地平线“2020”;
关键词
MOLECULAR-WEIGHT; BUTYL ACRYLATE; ONLINE CONTROL; KINETICS; MONOMER; COPOLYMERIZATION;
D O I
10.1021/acs.iecr.0c02771
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Emulsion polymerization reactors usually operate under starved conditions to better control the polymer properties and keep a safe operation. The main drawback is the low productivity obtained. In this work, we optimize offline the flow rates for the semibatch emulsion polymerization of styrene under starved conditions and keeping the reaction under diffusion limitation in order to maximize the reaction rate. To achieve this, we impose the maximal concentration of monomer in the particles as a path constraint. This results in a higher reaction rate compared to starved conditions close to saturation. At the same time, it enables safe operation by avoiding accumulation of monomer that may react hazardously at the end of the reaction, once the gel effect occurs. Therefore, we show that high productivity can be obtained by operating the reactor under starved conditions. We compare the optimal recipe under diffusion limitations with the benchmark of keeping the concentration of monomer in the polymer particles close to saturation and with constant feeding flow rates. We find consistent improvement of both the average reaction rate and the amount of polymer produced in the optimized strategy.
引用
收藏
页码:16368 / 16379
页数:12
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