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Ghasem N. Transient Behavior and Control of Polyethylene Production in a Fluidized Bed Reactor Utilizing Population Balance Model. Int J Mol Sci 2024; 25:2602. [PMID: 38473846 DOI: 10.3390/ijms25052602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/05/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024] Open
Abstract
In this study, a fluidized bed reactor for polyethylene production was employed using a dry mode approach, where the recycle stream may contain components of a nature that cannot be condensed through standard cooling. To analyze the behavior of the fluidized bed reactors during the copolymerization of ethylene with butene, a dynamic population balance model was employed. The study includes sensitivity analyses through computer simulations to examine the variations in reactor temperature, molecular weights, catalyst feed rate, and monomer/comonomer concentrations in the fluidized bed reactor. It is noteworthy that the reactor exhibits instability under normal operational conditions and is sensitive to changes in the catalyst feed rate and coolant temperature of the heat exchanger. The findings also highlight challenges such as temperature fluctuations above the polymer melting point. This underscores the importance of implementing a temperature control system to prevent issues like reactor shutdown due to elevated temperatures. Dynamic instabilities were observed under specific circumstances and were successfully controlled using Proportional Integral Derivative (PID) control strategies. The population balance model is essential for understanding the complexity of transient polymerization reactions. It enables researchers to simulate and optimize polymerization processes by utilizing the detailed kinetics of the reaction.
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Affiliation(s)
- Nayef Ghasem
- Department of Chemical & Petroleum Engineering, United Arab Emirates University (UAEU), Al-Ain P.O. Box 15551, United Arab Emirates
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2
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Valsecchi M, Galindo A, Jackson G. Modeling Sorption of Hydrocarbons in Polyethylene with the SAFT-γ Mie Approach Combined with a Statistical-Mechanical Model to Describe Semicrystalline Polymers. Macromolecules 2023; 56:9952-9968. [PMID: 38161323 PMCID: PMC10753906 DOI: 10.1021/acs.macromol.3c01336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 09/26/2023] [Indexed: 01/03/2024]
Abstract
A recently developed statistical-mechanical model is applied systematically to estimate the fraction of tie-molecules (polymer chains linking different crystals directly or via entanglements) in semicrystalline polyethylene (PE) samples. The amorphous domains of the polymer are divided into constrained interlamellar domains and "free" outer-lamellar domains. A set of model parameters is assigned to each sample by correlating previous experimental measurements and minimizing the difference between the predicted solubility of pure hydrocarbons in the sample and the experimental values. We show that the sorption isotherms of multiple pure fluids in each sample can be described by a single parameter set, proving that the polymer-solute interactions (described accurately by the SAFT-γ Mie EoS) are decoupled from the sample-specific properties of the polymer. We find that ∼30% of the crystalline stems in the lamellae of PE are connected to tie-molecules, within the bounds suggested by previous theoretical and computational work. The transferability of the sample-specific parameters is assessed by predicting cosolubility effects and solubility at different temperatures, leading to good agreement with experimental data.
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Affiliation(s)
- Michele Valsecchi
- Department
of Materials, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K.
- Department
of Chemical Engineering, Imperial College
London, South Kensington
Campus, London SW7 2AZ, U.K.
| | - Amparo Galindo
- Department
of Chemical Engineering, Imperial College
London, South Kensington
Campus, London SW7 2AZ, U.K.
| | - George Jackson
- Department
of Chemical Engineering, Imperial College
London, South Kensington
Campus, London SW7 2AZ, U.K.
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3
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Sbaaei ES, Kamal MM, Ahmed TS. Mathematical versus commercial software modeling for Ziegler-Natta catalyzed gas-phase polymerization in fluidized-bed reactors: A comparative review and proposals for future developments. POWDER TECHNOL 2023. [DOI: 10.1016/j.powtec.2023.118371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Feng HH, Yang GX, Wang HL, Gu XP, Feng LF, Zhang CL, Chen X, Wang DF, Gao YX. Kinetic Parameter Estimation for Linear Low-Density Polyethylene Gas-Phase Process from Molecular Weight Distribution and Short-Chain Branching Distribution Measurements. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Huang-He Feng
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou310027, Zhejiang, China
| | - Guo-Xing Yang
- Daqing Petrochemical Research Center of Petrochina, Daqing163714, Heilongjiang, China
| | - Han-Lin Wang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou310027, Zhejiang, China
| | - Xue-Ping Gu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou310027, Zhejiang, China
- Institute of Zhejiang University − Quzhou, Quzhou324000, Zhejiang, China
| | - Lian-Fang Feng
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou310027, Zhejiang, China
- Institute of Zhejiang University − Quzhou, Quzhou324000, Zhejiang, China
| | - Cai-Liang Zhang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou310027, Zhejiang, China
- Institute of Zhejiang University − Quzhou, Quzhou324000, Zhejiang, China
| | - Xi Chen
- National Center for International Research on Quality-targeted Process Optimization and Control, College of Control Science & Engineering, Zhejiang University, Hangzhou310027, Zhejiang, China
| | - Deng-Fei Wang
- Daqing Petrochemical Research Center of Petrochina, Daqing163714, Heilongjiang, China
| | - Yu-Xin Gao
- Daqing Petrochemical Research Center of Petrochina, Daqing163714, Heilongjiang, China
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Kulajanpeng K, Sheibat–Othman N, Tanthapanichakoon W, McKenna TFL. Multiscale modelling of multizone gas phase propylene (co)polymerization reactors—A comprehensive review. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kusuma Kulajanpeng
- Université de Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR5128, Catalyse, Polymérisation, Procédés et Matériaux (CP2M) Villeurbanne France
- SCG Chemicals Co., Ltd. Bangkok Thailand
| | - Nida Sheibat–Othman
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, UMR 5007, LAGEPP Villeurbanne France
| | | | - Timothy F. L. McKenna
- Université de Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS, UMR5128, Catalyse, Polymérisation, Procédés et Matériaux (CP2M) Villeurbanne France
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6
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Soares JBP, McKenna TFL. A conceptual multilevel approach to polyolefin reaction engineering. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24406] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- João B. P. Soares
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
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Sabia C, Buffo A, Casalini T, Marchisio DL, Barbato MC, Storti G. FBR for Polyolefin Production in Gas Phase: Validation of a Two‐phase Compartmentalized Model by Comparison with CFD. MACROMOL REACT ENG 2022. [DOI: 10.1002/mren.202100058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Carmine Sabia
- C. Sabia, Department of Innovative Technologies SUPSI Via la Santa 1 Lugano 6962 Switzerland
- C. Sabia, Department of Science and Technology Politecnico di Torino Corso Duca degli Abruzzi 24 Torino 10129 Italy
| | - Antonio Buffo
- A. Buffo, D.L. Marchisio, Department of Science and Technology Politecnico di Torino Corso Duca degli Abruzzi 24 Torino 10129 Italy
| | - Tommaso Casalini
- T. Casalini, Department of Innovative Technologies SUPSI Via la Santa 1 Lugano 6962 Switzerland
- T. Casalini, Department of Chemistry and Applied Biosciences Institute for Chemical and Bioengineering, ETH Zurich Vladimir‐Prelog‐Weg 1–5/10 Zurich 8093 Switzerland
| | - Daniele L. Marchisio
- A. Buffo, D.L. Marchisio, Department of Science and Technology Politecnico di Torino Corso Duca degli Abruzzi 24 Torino 10129 Italy
| | - Maurizio C. Barbato
- M.C. Barbato, Department of Innovative Technologies SUPSI Via la Santa 1 Lugano 6962 Switzerland
| | - Giuseppe Storti
- G. Storti, Department of Chemistry and Applied Biosciences Institute for Chemical and Bioengineering, ETH Zurich Vladimir‐Prelog‐Weg 1–5/10 Zurich 8093 Switzerland
- Current affiliation: Department of Chemistry Materials, and Engineering Chemistry “Giulio Natta”, Politecnico di Milano Via Mancinelli 7 Milan 20131 Italy
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Ben Mrad A, Sheibat‐Othman N, Valaei S, Bartke M, McKenna TFL. Diffusivity of Multicomponent Gas Mixtures in Polyethylene. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Nida Sheibat‐Othman
- University of Lyon University Claude Bernard Lyon 1 CNRS, LAGEPP UMR 5007 Villeurbanne F‐69100 France
| | - Sina Valaei
- Heinrich‐Damerow‐Straße 4 Martin‐Luther‐University Halle‐Wittenberg Halle 06120 Germany
| | - Michael Bartke
- Heinrich‐Damerow‐Straße 4 Martin‐Luther‐University Halle‐Wittenberg Halle 06120 Germany
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Alves RF, McKenna TFL. Modelling of Condensed Mode Cooling during the Polymerization of Ethylene in Fluidized Bed Reactors. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02159] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rita Ferreira Alves
- Catalyse, Polymérisation, Procédés et Matériaux UMR-5128, Université de Lyon, CNRS, CPE-Lyon, UCB Lyon-1, 43 Blvd du 11 Novembre 1918, 69616 Villeurbanne Cedex, France
| | - Timothy F. L. McKenna
- Catalyse, Polymérisation, Procédés et Matériaux UMR-5128, Université de Lyon, CNRS, CPE-Lyon, UCB Lyon-1, 43 Blvd du 11 Novembre 1918, 69616 Villeurbanne Cedex, France
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