Dynamic simulation of molecular weight distribution of ethylene slurry polymerization

doi:10.3969/j.issn.0438-1157.2013.04.027

CIESC Journal ›› 2013, Vol. 64 ›› Issue (4): 1312-1317.DOI: 10.3969/j.issn.0438-1157.2013.04.027

Previous Articles Next Articles

Dynamic simulation of molecular weight distribution of ethylene slurry polymerization

HUAN Jinlong¹, ZHAN Zhiliang¹, CHEN Xi¹, SHAO Zhijiang¹, YAO Zhen², GU Xueping², FENG Lianfang²

1. State Key Laboratory of Industrial Control Technology, Department of Control Science and Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China;
2. State Key Laboratory of Chemical Engineering, Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China

Received:2012-07-30 Revised:2012-11-21 Online:2013-04-05 Published:2013-04-05
Supported by:
supported by the National Basic Research Program of China(2012CB720503), the National Natural Science Foundation of China(61074148) and the Fundamental Research Funds for the Central Universities.

乙烯淤浆聚合动态分子量分布模拟计算

奂金龙¹, 占志良¹, 陈曦¹, 邵之江¹, 姚臻², 顾雪萍², 冯连芳²

1. 工业控制技术国家重点实验室,浙江大学控制科学与工程学系,浙江杭州 310027;
2. 化学工程联合国家重点实验室,浙江大学化学工程与生物工程学系,浙江杭州 310027

通讯作者: 陈曦
作者简介:奂金龙(1988—),男,硕士研究生。
基金资助:
国家重点基础研究发展计划项目(2012CB720503);国家自然科学基金项目(61074148);中央高校基本科研业务费专项资金。

Abstract

Abstract: Based on the dynamic model of ethylene slurry polymerization, a decoupling method was proposed for rigorous model calculation of molecular weight distribution(MWD).The MWD model in large scale differential-algebraic equations(DAEs) was decoupled to a moment model in small scale DAEs and chain length based MWD in large scale ordinary differential equations(ODEs).The variable decoupling method was further proposed to solve the large scale ODEs through numerical computation. Comparison of the MWD curves with Flory distribution calculation was also presented and discussed.

Key words: ethylene slurry polymerization, dynamic model, molecular weight distribution

摘要： 以乙烯淤浆聚合反应过程为研究对象,提出动态分子量分布的严格模型的数值计算方法。将动态分子量分布的大规模微分代数混合模型解耦为小规模微分代数方程组动态矩模型与大规模常微分方程组粒数衡算模型,然后通过变量解耦的方法进一步将大规模粒数衡算方程组转换为序贯差分方程组,实现了乙烯动态分子量分布严格模型的数值模拟计算。动态模拟乙烯聚合反应从一个稳态切换到另一个稳态,通过在切换后稳态的分子量分布计算结果与Flory分布计算方法进行比较,两者得到的分子量分布曲线吻合很好,证实了本文提出的动态模拟计算方法的精度和准确度都获得良好的保障。

关键词: 乙烯淤浆聚合, 动态模拟, 分子量分布

CLC Number:

TQ325

HUAN Jinlong, ZHAN Zhiliang, CHEN Xi, SHAO Zhijiang, YAO Zhen, GU Xueping, FENG Lianfang. Dynamic simulation of molecular weight distribution of ethylene slurry polymerization[J]. CIESC Journal, 2013, 64(4): 1312-1317.

奂金龙, 占志良, 陈曦, 邵之江, 姚臻, 顾雪萍, 冯连芳. 乙烯淤浆聚合动态分子量分布模拟计算[J]. 化工学报, 2013, 64(4): 1312-1317.

References 12

[1]	Gross J,Sadowski G. Perturbed-chain SAFT:an equation of state based on a perturbation theory for chain molecules[J].Industrial & Engineering Chemistry Research, 2001,40(4):1244-1260
[2]	Lophaven S N, Nielsen H B, Sndergaard J. DACE:a Matlab kriging toolbox[R].Informatics and Mathematical Modeling, Technical University of Denmark, 2002
[3]	Shen Hang(沈航).ASPEN modeling of slurry polyethylene production process[D].Hangzhou:Zhejiang University, 2006
[4]	Wächer A. An interior point algorithm for large-scale nonlinear optimization with applications in process engineering[D].Pittsburgh, PA, USA:Carnegie Mellon University, 2002
[5]	Cozewith C. Transient response of continuous-flow stirred-tank polymerization reactors[J].AIChE Journal, 1988, 34(2):272-282
[6]	Soares J B P, Hamielec A E.General dynamic mathematical-modeling of heterogeneous Ziegler-Natta and Metallocene catalyzed copolymerization with multiple-site types and mass and heat-transfer resistances[J].Polymer Reaction Engineering, 1995, 3(3):261-324
[7]	Shi Zijin(史子瑾). The Basis of Polymer Reaction Engineering(聚合反应工程基础)[M].Beijing:Chemical Industry Press, 1991
[8]	Flory P J.Principles of Polymer Chemistry[M].New York:Cornell University Press, 1953
[9]	Xie T, McAuley K B,Hsu J C C, Bacon D W. Modeling molecular weight development of gas-phase-olefin copolymerization[J].AIChE Journal, 1995,41(5):1251-1265
[10]	Feng Jian(冯剑).Radical polymerization product design and large-scale computing of molecular weight distribution[D].Hangzhou:Zhejiang University, 2007
[11]	Fan Weiwei(范伟伟).Large-scale dynamic optimization of polymer molecular weight distribution[D].Hangzhou:Zhejiang University, 2011
[12]	Gu Xueping(顾雪萍), Feng Lianfang(冯连芳), Wang Jiajun(王嘉骏),et al. Simulation for grade transition of ethylene slurry polymerization process[J].Science Paper Online(中国科技论文在线), 2008, 12(3):915-918

[1]	Weiming SHAO, Wenxue HAN, Wei SONG, Yong YANG, Can CHEN, Dongya ZHAO. Dynamic soft sensor modeling method based on distributed Bayesian hidden Markov regression [J]. CIESC Journal, 2023, 74(6): 2495-2502.
[2]	Kun WANG, Hongbo SHI, Shuai TAN, Bing SONG, Yang TAO. Local time difference constrained neighborhood preserving embedding algorithm for fault detection [J]. CIESC Journal, 2022, 73(7): 3109-3119.
[3]	Le ZHOU, Chengkai SHEN, Chao WU, Beiping HOU, Zhihuan SONG. Deep fusion feature extraction network and its application in chemical process soft sensing [J]. CIESC Journal, 2022, 73(7): 3156-3165.
[4]	Wenxin MEN, Qingshou PENG, Xia GUI. Phase equilibrium of CO₂ hydrate in the presence of four different quaternary ammonium salts [J]. CIESC Journal, 2022, 73(4): 1472-1482.
[5]	Huan GAO, Guoliang DING, Faxian ZHOU, Dawei ZHUANG. Research on dynamic separation characteristics of R410A refrigerant with lubricant [J]. CIESC Journal, 2022, 73(3): 1054-1062.
[6]	LI Dan, SUN Shuaiqi, ZHANG Tao, ZHAO Yihui, MENG Lingzong, GUO Yafei, DENG Tianlong. Pitzer thermodynamic model of the system HCl-NaCl-CaCl₂-H₃BO₃-H₂O at 298.15 K and its application [J]. CIESC Journal, 2021, 72(6): 3160-3169.
[7]	SHI Shanshan, WEI Aibo, ZHANG Xiaobin. CFD simulation and experimental research on ultrasonic cavitation of liquid nitrogen [J]. CIESC Journal, 2021, 72(4): 1930-1938.
[8]	LI Mengyang, GAO Ming, ZUO Qirong, ZHANG Lixin, ZHAO Yugang. Visualization investigation of TBAB hydrate formation in droplets on supercooled wall surfaces [J]. CIESC Journal, 2021, 72(4): 2094-2101.
[9]	CHEN Boya, LI Mingyan, ZHU Yuhang, PENG Changjun, LIU Honglai. Calculating adsorption isotherm of gas mixture at solid interface using molecular thermodynamic model of two-dimensional fluid [J]. CIESC Journal, 2021, 72(2): 913-920.
[10]	Xiaohui WANG, Yanjiang WANG, Xiaogang DENG, Zheng ZHANG. Industrial process fault detection using weighted deep support vector data description [J]. CIESC Journal, 2021, 72(11): 5707-5716.
[11]	JI Yuanhui, CHEN Qiao, WENG Jingyun. Nonequilibrium thermodynamic modeling and prediction of the effect of polymer excipients on aspirin crystallization kinetics [J]. CIESC Journal, 2021, 72(1): 508-520.
[12]	Pan LI, Hui KONG, Zhuodong SONG, Zuoyi ZHANG, Yunfang WANG. Vapor-liquid equilibrium for methanol-formaldehyde-polyoxymethylene dimethyl ethers ternary system [J]. CIESC Journal, 2020, 71(S1): 7-14.
[13]	Fanxin MENG, Jianing SUN, Yue ZHOU, Zanjun GAO, Dingbin CHENG. Modeling and validating of air cycle machine in aircraft environmental control system [J]. CIESC Journal, 2020, 71(S1): 328-334.
[14]	Linzi YIN, Yuyin GUAN, Zhaohui JIANG, Xuemei XU. Optimal method of selecting silicon content data in blast furnace hot metal based on k-means++ [J]. CIESC Journal, 2020, 71(8): 3661-3670.
[15]	Xuejin GAO, Tengfei LIU, Zidong XU, Huihui GAO, Yongchuan YU. Intermittent process fault monitoring based on recurrent autoencoder [J]. CIESC Journal, 2020, 71(7): 3172-3179.

Dynamic simulation of molecular weight distribution of ethylene slurry polymerization

乙烯淤浆聚合动态分子量分布模拟计算

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References 12

Related Articles 15

Recommended Articles

Metrics

Comments