Optimization of Operating Conditions for Polymer Quality Control in a Continuous Stirred Tank Reactor
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An objective function to determine the optimal operating conditions to produce polymers with a specified molecular weight distribution (MWD) in a continuous stirred tank reactor (CSTR) was formulated. Two polymerization cases were studied: free radical styrene polymerization and cationic isobutylvinylether polymerization. The optimization results of objective function <I>J</I><SUB>1</SUB> in view of finite weight fraction stopped near a curve that passes through a predefined optimal point instead of the target point for both cases. Objective function <I>J</I><SUB>2</SUB>, based on two MWD parameters, was formulated to investigate the optimization result of <I>J</I><SUB>1</SUB>. In the case of styrene polymerization, the optimization searches of <I>J</I><SUB>2</SUB> converged on the optimal point. On the other hand, in the case of isobutylvinylether polymerization, the optimal point cannot be obtained by minimizing <I>J</I><SUB>2</SUB>. In this case, an additional constraint such as polymer concentration is needed to determine an optimal solution.
- JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 41(5), 394-402, 2008-05-01
The Society of Chemical Engineers, Japan