Heat transfer effect in scaling-up a fluidized bed reactor for propylene polymerization

Bumphenkiattikul, Panut; Limtrakul, Sunun; Vatanatham, Terdthai; Khongprom, Parinya; Ramachandran, P.A.

doi:10.1039/c8ra04834g

Cited by 11 publications

(9 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bumphenkiattikul et al. [ 150 ] coupled a phenomenological mathematical model and CFD simulations for the analysis of hot spots and heat transfer in FBR reactors. Both models included population balances for the implementation of detailed kinetic scheme for polymerization (that involved initiation, propagation, chain transfer and termination) subsequently solved with the method of the moments.…”

Section: Macroscale Modeling With Computational Fluid Dynamicsmentioning

confidence: 99%

Gas‐Phase Polyethylene Reactors—A Critical Review of Modeling Approaches

Alves

Casalini

Storti

et al. 2021

Macro Reaction Engineering

View full text Add to dashboard Cite

Different approaches to modeling the gas phase polymerization of ethylene that have been considered in the literature are reviewed. It is shown that while simple, well‐mixed models can give an adequate representation of the average performance of a given polymerization reactor, they do not allow one to analyze certain modeling problems such as the existence of temperature gradients or particle segregation, nor can they be used to treat operational modes such as condensed cooling where there can be up to three different phases in different parts of the reactor. For this, more complex models are required. These can take the form of compartmentalized models or even models based on computation fluid dynamics. However, long computational times can be required to fully exploit these models. Furthermore, significant progress needs to be made if one needs to address important phenomena such as agglomeration or particle attrition during polymerization.

show abstract

Section: Macroscale Modeling With Computational Fluid Dynamicsmentioning

confidence: 99%

Gas‐Phase Polyethylene Reactors—A Critical Review of Modeling Approaches

Alves

Casalini

Storti

et al. 2021

Macro Reaction Engineering

View full text Add to dashboard Cite

show abstract

“…The computation was carried out with a three-dimensional single precision, which produced accurate predictions in many cases. [17][18][19] The maximum residual tolerance was set as 10 À4 for classical calculating equations. The ambient water was adopted as the uid and the inlet boundary velocity was set as 2 cm s À1 according to the actual situation.…”

Section: Analyses and Calculationsmentioning

confidence: 99%

A tubular electrode assembly reactor for enhanced electrochemical wastewater treatment with a Magnéli-phase titanium suboxide (M-TiSO) anode and in situ utilization

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Abbasi et al, [ 2 ] Shamiri et al, [ 39 ] Salahuddin et al, [ 40 ] and Atan and Hussain [ 41 ] improved the two‐phase model by adding more details to the assumptions, respectively considering the presence of solid elutriation at the top of the fluidized bed reactor for the polymerization of ethylene, copolymerization of ethylene and propylene, and polymerization of propylene. Lastly, Bumphenkiattikul et al [ 42 ] studied the CFD‐based model by considering the presence of heat loss through the fluidized bed wall for the purpose of scaling up the reactor.…”

Section: Introductionmentioning

confidence: 99%

The influence of catalyst flow rate and superficial gas velocity on the modified two‐phase model for propylene polymerization in a gas‐phase fluidized bed reactor

Atan

Hussain

Shamiri³

2021

Can J Chem Eng

View full text Add to dashboard Cite

Olefin polymerization, especially of propylene in gas‐phase fluidized bed reactors, is increasingly prevalent because of its ability to handle the continuous process, among other advantages. The challenge for modelling this process is solving the high nonlinearity phenomena in such a system. This research studies the influence of catalyst flow rate and superficial gas velocity on the modified two‐phase model. The catalyst flow rates were set at 1 × 10−4, 2 × 10−4, and 3 × 10−4 kg/s, while the superficial flow rates were set at 0.35, 0.5, and 0.65 m/s. Production rate, reactor temperature, and heat‐loss flow rate were found to be proportional to catalyst flow rate and inversely proportional to superficial gas velocity. Heat loss through the fluidized bed wall had an influence only on the reactor temperature. Finally, predicted reactor temperatures corresponded closely to the pilot plant data, with deviations smaller than 0.5%.

show abstract

Heat transfer effect in scaling-up a fluidized bed reactor for propylene polymerization

Abstract: The effects of operating conditions and scaling-up on reactor temperature control and performance in propylene polymerization fluidized bed reactors were studied by phenomenological and CFD models.

Cited by 11 publications

References 47 publications

Gas‐Phase Polyethylene Reactors—A Critical Review of Modeling Approaches

Gas‐Phase Polyethylene Reactors—A Critical Review of Modeling Approaches

A tubular electrode assembly reactor for enhanced electrochemical wastewater treatment with a Magnéli-phase titanium suboxide (M-TiSO) anode and in situ utilization

The influence of catalyst flow rate and superficial gas velocity on the modified two‐phase model for propylene polymerization in a gas‐phase fluidized bed reactor

Contact Info

Product

Resources

About