Optimal seeding in batch crystallization

被引:124
作者
Chung, SH [1 ]
Ma, DL [1 ]
Braatz, RD [1 ]
机构
[1] Univ Illinois, Dept Chem Engn, Urbana, IL 61801 USA
关键词
crystallization; optimal control; dynamic programming; batch control;
D O I
10.1002/cjce.5450770322
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This is the first comprehensive study on the optimization of seed distribution in a crystallization process. For a batch crystallizer, a dynamic programming formulation optimizes a property of the product crystals over the supersaturation profile and the seed characteristics, namely the mean size of the seed crystals, the seed mass, and the width of the seed distribution. Three optimization objectives are considered: (1) weight mean size, (2) coefficient of variation, and (3) the ratio of the nucleated crystal mass to seed crystal mass. Different objectives lead to substantially different optimal seed distributions. It is shown that optimizing over the seed, distribution can have a larger effect on the product crystal size distribution than optimizing over the supersaturation profile.
引用
收藏
页码:590 / 596
页数:7
相关论文
共 23 条
[1]  
Ajinkya M.B., 1974, CHEM ENG COMMUN, V1, P181
[2]   APPLICATION OF CONTROLLED COOLING AND SEEDING IN BATCH CRYSTALLIZATION [J].
BOHLIN, M ;
RASMUSON, AC .
CANADIAN JOURNAL OF CHEMICAL ENGINEERING, 1992, 70 (01) :120-126
[3]   THE GROWTH OF CRYSTALS AND THE EQUILIBRIUM STRUCTURE OF THEIR SURFACES [J].
BURTON, WK ;
CABRERA, N ;
FRANK, FC .
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1951, 243 (866) :299-358
[4]  
CHANG C, 1982, AICHE S SERIES, V215, P68
[5]   L-SERINE OBTAINED BY METHANOL ADDITION IN BATCH CRYSTALLIZATION [J].
CHARMOLUE, H ;
ROUSSEAU, RW .
AICHE JOURNAL, 1991, 37 (08) :1121-1128
[6]  
CHIANESE A, 1984, IND CRYSTALLIZATION, P443
[7]   FEEDBACK-CONTROL OF CHEMICAL PROCESSES USING ONLINE OPTIMIZATION TECHNIQUES [J].
EATON, JW ;
RAWLINGS, JB .
COMPUTERS & CHEMICAL ENGINEERING, 1990, 14 (4-5) :469-479
[8]  
GARSIDE J, 1984, AICHE S SERIES, V240, P23
[9]   SOME PROBLEMS IN PARTICLE TECHNOLOGY - A STATISTICAL MECHANICAL FORMULATION [J].
HULBURT, HM ;
KATZ, S .
CHEMICAL ENGINEERING SCIENCE, 1964, 19 (08) :555-574
[10]  
*IMSL, 1997, IMSL