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《Journal of Beijing University of Chemical Technology(Natural Science Edition)》 2014-05
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Optimal grade transition strategy for a continuous styrene polymerization process

LIU ShengYun;GUO Qing;CHEN Juan;JIN CuiYun;College of Information Science and Technology,Beijing University of Chemical Technology;  
An effective grade transition policy is essential when several grades of polymers are produced in the same continuous stirred tank reactor( CSTR). In order to minimize operation costs,an optimal two-stage grade transition operation strategy has been developed in this study. In the dynamic optimization stage,the input variable trajectories were calculated by iterative dynamic programming( IDP). The objective function measuring the molecular weight distribution,temperature and initiator flow was formulated to minimize the raw material consumption during the transition operation. Through a case study of free radical styrene polymerization in a pilot CSTR,we show that the proposed operation strategy can shorten the transition time,and also reduce the consumption of monomer and initiator during the grade transition.
【Fund】: 国家自然科学基金(21376014/21146009)
【CateGory Index】: TQ316
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