Condensed mode cooling of ethylene polymerization in fluidized bed reactors

TFL McKenna - Macromolecular Reaction Engineering, 2019 - Wiley Online Library
This review gives an overview of the evolution of the technology of condensed mode
cooling, primarily for the case of ethylene polymerization on supported catalysts in fluidized …

Experimental and modeling investigation of liquid-induced agglomeration in a gas–solid fluidized bed with liquid spray

J Sun, S Tian, S Li, Y Yang, Z Huang… - Industrial & …, 2020 - ACS Publications
Particle agglomeration induced by liquid bridge force widely exists in industrial fluidization
processes involving liquid spray. To understand the agglomeration mechanism, a cold …

[PDF][PDF] Ziegler–Natta Polymerization: HDPE, PP, LLDPE, and EPDM

YA Liu, N Sharma - … Process Modeling, Advanced Control and Data …, 2023 - academia.edu
This chapter presents a novel approach to modeling the manufacturing processes of
highdensity polyethylene (HDPE), polypropylene (PP), linear low-density polyethylene …

Modelling of condensed mode cooling during the polymerization of ethylene in fluidized bed reactors

RF Alves, TFL McKenna - Industrial & Engineering Chemistry …, 2021 - ACS Publications
A compartmentalized reactor model has been developed to simulate the impact of running a
fluidized bed reactor for the gas-phase production of ethylene in condensed mode …

Important analysis of liquid vaporization modeling scheme in computational fluid dynamics modeling of gas–liquid–solid polyethylene fluidized bed reactors

H Pan, XF Liang, LT Zhu, ZH Luo - Industrial & Engineering …, 2017 - ACS Publications
A developed three-fluid computational fluid dynamics model was used to investigate the
three-phase system in a polyethylene industrial fluidized bed in condensed mode. This …

Modeling of the temperature profile in an ethylene polymerization fluidized-bed reactor in condensed-mode operation

Y Zhou, J Wang, Y Yang, W Wu - Industrial & Engineering …, 2013 - ACS Publications
Condensed-mode operation of an ethylene polymerization fluidized-bed reactor is of great
significance in academic and industrial circles. Based on the classical emulsion–bubble two …

Dynamic characteristics of the volatile cloudy zone in a gas–solid fluidized bed with hydrocarbon liquid spray

S Tian, J Sun, Y Yang, Y Yang, Z Huang… - AIChE …, 2021 - Wiley Online Library
In a gas–solid fluidized bed with continuous hydrocarbon liquid spray, a volatile “cloudy
zone” could be formed, defined as a dynamically steady liquid‐affected zone, including …

Optimal polymer grade transitions for fluidized bed reactors

Y Wang, LT Biegler, GS Ostace, RA Majewski - Journal of Process Control, 2020 - Elsevier
Industrial polymerization plants experience frequent changes of products, driven by end-use
properties to meet various market requirements. Efficient grade transition policies are …

CFD modeling of the gas–solid two-fluid flow in polyethylene FBRs: From traditional operation to super-condensed mode

H Pan, XF Liang, ZH Luo - Advanced Powder Technology, 2016 - Elsevier
A computational fluid dynamics (CFD) model based on the Eulerian–Eulerian approach,
coupled with polymerization kinetics, has been implemented to describe the gas–solid flow …

Operating stability analysis of continuous gas–liquid–solid FBR under super-condensed mode

WY Ma, ZH Luo - Advanced Powder Technology, 2019 - Elsevier
In the gas–liquid–solid fluidized bed reactor (FBR) under super-condensed mode, the
injection of liquid causes the particle agglomeration that leads to a complicated and …