Optimal grade transition based on residence time distribution of catalyst particles in bimodal polyethylene production process

Huagong Xuebao/CIESC Journal

Volumn 60, Issue 11, 2009, Pages 2847-2853

  Wei, Geyi ^a,b   Wang, Jingdai ^a,b   Yang, Yongrong ^a,b  

^a ZHEJIANG UNIVERSITY   (China)

^b ZHEJIANG UNIVERSITY   (China)

Author keywords

Bimodal polyethylene; Catalyst changeover; Grade transition; Optimization; Residence time distribution

Indexed keywords

BIMODAL POLYETHYLENE; CATALYST CHANGEOVERS; CATALYST PARTICLES; FLUIDIZED BED REACTORS; GRADE TRANSITION; GRADE TRANSITION OPTIMIZATION; LOOP REACTORS; MANIPULATED VARIABLES; MASS FRACTION; MELT INDEX; OPTIMAL GRADE TRANSITION; OPTIMAL STRATEGIES; POLYMER DENSITIES; POLYMER PROPERTIES; RESIDENCE TIME DISTRIBUTIONS; RESIN PROPERTIES; STEP-BY-STEP; TANKS-IN-SERIES; TRANSITION TIME;

CATALYSTS; CHEMICAL REACTORS; FLUID CATALYTIC CRACKING; FLUIDIZATION; FLUIDIZED BEDS; OPTIMIZATION; POLYETHYLENES; POLYMER MELTS; RESINS; THERMOPLASTICS;

CATALYSIS;

EID: 70749160973     PISSN: 04381157     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (12)

1. McAuley K B, MacGregor J F. Optimal grade transition in a gas phase polyethylene reactor. AIChE Journal, 1992, 38(10):1564-1576
2. Takeda M, Ray W H. Optimal-grade transition strategies for multistage polyolefin reactors. AIChE Journal, 1999, 45(8):1776-1793
3. Wang Jingdai, Chen Jizhong, Yang Yongrong, Cheng Zhiqiang, Dai Liankui. Application of iterative dynamic programming to optimal grade transition model. Journal of Chemical Engineering of Chinese Universities, 2000, 14(3):264-269
4. Wang Jingdai, Yang Yongrong. Study on optimal strategy of grade transition in industrial fluidized bed gas-phase polyethylene production process. Chinese J. Chem. Eng., 2003, 11(1):1-8
5. Wang Jingdai, Chen Jizhong, Yang Yongrong. Optimal multi-product transition operation in continuous polymerization process. Journal of Chemical Engineering of Chinese Universities, 2003, 17(1):80-85
6. Yi Heui-Seok, Kim Jeong Hwan, Han Chonghun. Plantwide optimal grade transition for an industrial high-density polyethylene plant. Ind. Eng. Chem. Res., 2003, 42(1):91-98
7. Wang Ping, Wang Jingdai, Yang Yongrong. Optimization of grade transition for high density polyethylene continuous slurry process. Journal of Chemical Industry and Engineering(China), 2006, 57(11):2657-2663
8. Khare N P, Lucas B, Seavey K C, Liu Y A, Sirohi A, Ramanathan S, Lingard S, Song Y H, Chen C C. Steady-state and dynamic modeling of gas-phase polypropylene processes using stirred-bed reactors. Ind. Eng. Chem. Res., 2004, 43(4):884-900
9. McAuley K B, MacGregor J F. On-line inference of polymer properties in an industrial polyethylene reactor. AIChE Journal, 1991, 37(6):825-835
10. Oh Sang Joon, Lee Jinsuk, Park Sunwon. Prediction of pellet properties for an industrial bimodal high-density polyethylene process with Ziegler-Natta catalysts. Ind. Eng. Chem. Res., 2005, 44(1):8-20
11. Ogunnaike B A, Ray W H. Process Dynamics, Modeling and Control. New York: Oxford University Press, 1994:35-48
12. Wang Jingdai, Chen Jizhong, Yang Yongrong. Optimal grade transition in continuous polymerization process. Journal of Chemical Industry and Engineering(China), 2001, 52(4):295-300