A novel strategy for dynamic optimization of grade transition processes based on molecular weight distribution
A novel strategy for dynamic optimization of grade transition processes based on molecular weight distribution
复制标题
基于分子量分布的级变过程动态优化的新策略
DOI:
10.1002/aic.14445
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发表时间:
2014-07
期刊:
影响因子:
3.7
通讯作者:
Lorenz T. Biegler
中科院分区:
文献类型:
--
作者:
Jinzu Weng;Zhijiang Shao;Xi Chen;Xueping Gu;Zhen Yao;Lianfang Feng;Lorenz T. Biegler
To achieve different end-use properties of polymers, an industrial plant must produce several grades of the product through the same process under different operating conditions. As molecular weight distribution (MWD) is a crucial quality index of polymers, grade transition based on MWD is of great importance. Dynamic optimization of the grade transition process using MWD is a challenging task because of its large-scale nature. After analyzing the relationships among state variables during polymerization, a novel method is proposed to conduct the optimal grade transition using dynamic optimization with a small-scale moment model, combined with a steady-state calculation of the MWD. By avoiding expensive computation in dealing with dynamic MWD optimization, this technique greatly reduces the computational complexity of the process optimization. The theoretical equivalence of this simplification is also proved. Finally, an industrial high-density polyethylene slurry process is presented to demonstrate the efficiency and accuracy of the proposed strategy. © 2014 American Institute of Chemical Engineers AIChE J, 60: 2498–2512, 2014
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DOI:
10.1021/ie302488v
发表时间:
2013-01
期刊:
Industrial & Engineering Chemistry Research
影响因子:
--
作者:
Chen Zhang;Zhiliang Zhan;Zhijiang Shao;Yuhong Zhao;Xi Chen;Xuping Gu;Lianfang Feng;Lorenz T. Biegler
通讯作者:
Lorenz T. Biegler
影响因子:
4.3
作者:
P. Mills
通讯作者:
P. Mills
影响因子:
3.7
作者:
M. F. Ellis;T. W. Taylor;K. Jensen
通讯作者:
M. F. Ellis;T. W. Taylor;K. Jensen
影响因子:
4.6
作者:
J. Soares;A. Hamielec
通讯作者:
J. Soares;A. Hamielec
影响因子:
1.4
作者:
M. Wulkow
通讯作者:
M. Wulkow