Model of an industrial multitubular reactor for methanol to formaldehyde oxidation in the presence of catalyst deactivation

Braz, Catarina G.; Mendes, Adélio; Rocha, Jorge; Alvim, Ricardo; Matos, Henrique A.

doi:10.1016/j.ces.2018.09.033

Cited by 18 publications

(7 citation statements)

References 21 publications

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“…20 This approach has been applied successfully in previous works. 13,21 The gas-phase mass balance for a component (i) is shown in Equation (1) including accumulation, gas liquid mass transfer, convection, as well as axial and radial dispersion,…”

Section: Simple Modelmentioning

confidence: 99%

Modeling of three‐phase continuously operating open‐cell foam catalyst packings: Sugar hydrogenation to sugar alcohols

et al. 2022

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An advanced comprehensive and transient multiphase model for a trickle bed reactor with solid foam packings was developed. A new simulation model for isothermal three-phase (gas-liquid-solid) catalytic tubular reactor models was presented where axial, radial, and catalyst layer effects were included. The unique feature of this model is that the material balances include most of the individual terms (i.e., internal diffusion, gas-liquid, and liquid solid mass transfer, kinetics) for solid foam packing which is seldom done. Hydrogenation of arabinose and galactose mixture on a ruthenium catalyst supported by carbon-coated aluminum foams was applied as a fundamentally and industrially relevant case study. Parameter estimations allowed to obtain reliable and significant parameters. The effect of the kinetic parameters and the operation conditions on the arabinose and galactose conversions was studied in detail by sensitivity analysis. The model described is applicable for other three-phase continuous catalytic reactors with solid foam packings.

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Section: Simple Modelmentioning

confidence: 99%

Modeling of three‐phase continuously operating open‐cell foam catalyst packings: Sugar hydrogenation to sugar alcohols

et al. 2022

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“…In future work, the final absorption system model will be used together with a previously developed model of an oxidation reactor for the production of formaldehyde , to simulate an existing industrial formaldehyde production unit in order to study the complete process and to enhance its competitiveness in the market through the increase of its production capacity and cost reduction.…”

Section: Conclusion and Future Workmentioning

confidence: 99%

Modeling and Simulation of an Industrial Formaldehyde Absorption System

Braz

Lutters

Rocha

et al. 2020

Ind. Eng. Chem. Res.

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Although the absorption of formaldehyde is a crucial stage within its production process, the number of models available in the literature is limited. The complexity of the absorption of formaldehyde in water, in which chemical reactions in the liquid phase are combined with multicomponent mass transfer, makes the development of an adequate process model a challenging task. In this work, a rate-based model of an industrial absorption system for tray and packed columns was developed. The multicomponent mass transfer was described based on the two-film theory, and the model was implemented in the simulation tool gPROMS ModelBuilder 5.1.1 and validated against data from the design flowsheet provided by the industrial unit licensor and typical operation values measured in an industrial formaldehyde production unit. The simulation results were in good agreement with the expected data. With the validated model, the influence of some operating parameters on the column behavior was studied.

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“…We developed a compartmental model for an industrial fixed bed reactor to investigate the influence of pellet size and MoO3 content in the inlet part of the reactor on the development of the pressure drop 26 utilizing a previously made single pellet model for the loss of MoO3 from an industrial FeMo pellet 27 . Recent papers from other research groups dealing with understanding the industrial type catalyst includes preparation of Mo/Fe = 1.7 catalyst with γ-Al2O3 by co-precipitation to provide information of the structure sensitivity of the reaction 28 , modelling of the deactivation behavior for a multi-tube industrial reactor 29 , new methods of preparation 30,31 , DFT studies of methanol partial oxidation 32 and investigations of the active site 33,34 . A CFD study on the 4/29 influence of pellet shape (cylinders, spheres, rings and trilobes) on reactor performance found that rings gave the best overall performance, trilobes had the lowest pressure drop and a mixture of rings and trilobes may give a slight operational improvement 35 .…”

Section: Introductionmentioning

confidence: 99%

Hydroxyapatite supported molybdenum oxide catalyst for selective oxidation of methanol to formaldehyde: studies of industrial sized catalyst pellets

Thrane

Mentzel

Thorhauge

et al. 2021

Catal. Sci. Technol.

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Model of an industrial multitubular reactor for methanol to formaldehyde oxidation in the presence of catalyst deactivation

Cited by 18 publications

References 21 publications

Modeling of three‐phase continuously operating open‐cell foam catalyst packings: Sugar hydrogenation to sugar alcohols

Modeling of three‐phase continuously operating open‐cell foam catalyst packings: Sugar hydrogenation to sugar alcohols

Modeling and Simulation of an Industrial Formaldehyde Absorption System

Hydroxyapatite supported molybdenum oxide catalyst for selective oxidation of methanol to formaldehyde: studies of industrial sized catalyst pellets

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