Modeling of catalytic coke formation in thermal cracking reactors

Mohamadalizadeh, Ali; Towfighi, Jafar; Karimzadeh, Ramin

doi:10.1016/j.jaap.2008.02.006

Cited by 28 publications

(15 citation statements)

References 10 publications

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“…Furthermore, the high-magnification images of the filamentous coke show that the coke diameter is about 245 nm with a coarse skin. This can be attributed to the coke precursors in the gas phase react with the coke surface through radical reactions, and lateral growth of the filament begins [35,38].…”

Section: The Structure Of As-deposited Tin Coatingsmentioning

confidence: 99%

Characterization of CVD TiN coating at different deposition temperatures and its application in hydrocarbon pyrolysis

Tang

Gao

Wang

et al. 2014

Surface and Coatings Technology

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Section: The Structure Of As-deposited Tin Coatingsmentioning

confidence: 99%

Characterization of CVD TiN coating at different deposition temperatures and its application in hydrocarbon pyrolysis

Tang

Gao

Wang

et al. 2014

Surface and Coatings Technology

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“…Ref. [48,[117][118][119][120][121][122]), Beltramini et al [117] studied coke production and the deactivation effect on a bifunctional catalyst (metallic and acidic)…”

Section: Catalicity and Cokementioning

confidence: 99%

Hydrocarbon pyrolysis with a methane focus: A review on the catalytic effect and the coke production

Fau

Gascoin²,

Steelant

2014

Journal of Analytical and Applied Pyrolysis

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Hydrocarbon pyrolysis has been widely studied since the 1900's for applications in aerospace as a fuel and/or coolant or for use with fuel cells and hydrogen production with a catalyst. In this context, the role of heterogeneous reactions with homogeneous phase chemistry is unclear despite the fact that it is obviously at the heart of coupled physico-chemical phenomena. In addition, the thermal formation of solid carbon particles-coke, which can be deposited on the structure, impacts the heterogeneous reactions. The aim of this work is to review the available literature on hydrocarbon pyrolysis involving reactions with solid surfaces and coke particles. The influent parameters such as the nature of the fluid, the temperature (up to 2000 K), the pressure (up to 100 bars), the residence time (µs order to min order), the reactor type (plug flow, batch, perfectly stirred reactor) and the type of catalyst (inert, metallic or more complex such as zeolites) are discussed. Then, a link between catalicity and coke production is addressed. This literature survey focuses in particular on methane because of the growing interest regarding the potential for hypersonic applications.

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“…Snoeck's rate equation is adopted here because it has been used in other recent modelling studies and has provided adequate predictions. [29] In addition, Snoeck's rate expression is much simpler than the competing catalytic coke formation equations of Mohamadalizadeh et al, [36] which have not been validated by other research groups.…”

Section: Introductionmentioning

confidence: 99%

Modelling coke formation in an industrial ethane‐cracking furnace for ethylene production

et al. 2019

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The development of a model for predicting coke formation in an industrial ethylene cracking furnace is described. Expressions for predicting the rates of catalytic and pyrolytic coke formation are developed and a differential equation is derived to predict changes in coke thickness with time and position. An expression is developed to account for a decline in the rate of catalytic coke formation with increasing thickness of the coke layer. The proposed coke model equations are used to extend a previously developed ethane pyrolysis furnace model that ignored coke. Three model parameters related to coke formation are estimated using industrial data to obtain reliable model predictions. Two of these parameters are coefficients that appear in the catalytic and pyrolytic coke formation rate expressions. The third is a characteristic‐length parameter used to reduce the rate of catalytic coke formation as the coke layer grows. The resulting dynamic model matches the industrial data well and can be used to simulate furnace operation and predict coke thickness profiles over a variety of the operating conditions, thereby helping process engineers who plan the decoking process.

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Modeling of catalytic coke formation in thermal cracking reactors

Cited by 28 publications

References 10 publications

Characterization of CVD TiN coating at different deposition temperatures and its application in hydrocarbon pyrolysis

Characterization of CVD TiN coating at different deposition temperatures and its application in hydrocarbon pyrolysis

Hydrocarbon pyrolysis with a methane focus: A review on the catalytic effect and the coke production

Modelling coke formation in an industrial ethane‐cracking furnace for ethylene production

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