Multi‐scale modelling of monolith reactors: A 30‐year perspective from 1990 to 2020

Hayes, Robert E.; Cornejo, Iván

doi:10.1002/cjce.24144

Cited by 11 publications

(7 citation statements)

References 97 publications

(148 reference statements)

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“…The monolithic reactor was commonly applied for automotive exhaust gas treatment since the 1970s [35]. With a simple and robust design, the monolithic reactor is considered a potential PI replacement for the conventional packed bed reactor in catalytic gas-solid reactions [36].…”

Section: Applications and Effects Of Process Intensification On Energ...mentioning

confidence: 99%

Process intensification and digital twin – the potential for the energy transition in process industries

Huynh

Zondervan

2022

Physical Sciences Reviews

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The work defines and discusses process intensification (PI) and digital twin (DT) as potential tools to accelerate the energy transition through their applications in the process industries. The PI technologies take advantage of innovative principles in equipment design and control to improve the physical process, while the DT offers the virtual model of the plant as an environment for production optimization. The effects of both tools on the energy transition are evaluated not only from the point of applications but also from the possibility of implementation and barriers in process industries. Although they are beneficial, the deployment of PI and DT requires not only infrastructure and capital investment but the knowledge and cooperation of different levels of plant personnel. Besides review of individual implementation, this work explores the concept of combining PI and DT which can make them the enabler of each other and bring a breakthrough in optimization of process design and control.

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Section: Applications and Effects Of Process Intensification On Energ...mentioning

confidence: 99%

Process intensification and digital twin – the potential for the energy transition in process industries

Huynh

Zondervan

2022

Physical Sciences Reviews

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“…For decades, straight-channel monoliths have been widely used as catalytic support in several relevant industrial applications, such as CO abatement, steam reforming, and methanol synthesis [28][29][30][31][32]. Furthermore, in environmental applications, such as removal of NOx, volatile organic compounds abatement and air purification in exhaust gas, where low backpressure is mandatory, monoliths are excellent candidates for large scale applications, such as large-volume sandwich-type honeycomb monolith plasma reactors [30,33].…”

Section: Introductionmentioning

confidence: 99%

A Model for the Flow Distribution in Dual Cell Density Monoliths

Reinao

Cornejo

2023

Processes

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Monoliths are promising as catalytic structured supports due to their many operational advantages. Compared to pellets, monoliths offer low backpressure and good heat distribution, even at high flow rates. There is interest in the industry for improving temperature control in highly exothermic systems, such as the catalytic hydrogenation of CO2 for e-fuels synthesis. In this context, novel substrate shapes, such as non-homogeneous cell density monoliths, show good potential; however, to date, they have only been sparsely described. This work focuses on a dual cell density substrate and uses a computational model of a straight-channel monolith with two concentric regions to analyze its flow distribution. The central (core) and peripheral (ring) regions of the substrate differ in cell density in order to obtain a non-homogeneous cross-section. The model is validated against classical data in the literature and theoretical equations. Then, the flow fraction passing through each region of the substrate is registered. Several flow rates, core sizes and combinations of apparent permeabilities are tested. According to the results, the flow distribution depends only on the monolith geometrical features and not on the flow rate. A model for this phenomenon is proposed. The model accurately predicted the flow fraction passing through each region of the monolith for all the cases analyzed.

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“…Monolith honeycombs are solid pieces with several channels running in parallel that are widely used as catalyst support [1][2][3]. Early monolith reactors in car catalytic converters were typically a single monolith in a carcass [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A Model for Correcting the Pressure Drop between Two Monoliths

Cornejo

2021

Catalysts

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This paper is concerned with the modeling of the pressure drop through monolith honeycombs. Monolith substrates are promising for the intensification of catalytic processes, especially because of their low back-pressure. There have been several improvements in the modeling of monolith reactors during the last decade, most of them focused on a single substrate configuration, while research in multiple substrates in a single reactor is still sparse. One example is the so-called "minor losses", such as those because of the flow entering and leaving a substrate. Both phenomena interact when two monoliths are placed close in series, and the extra losses produced by them may become relevant when relatively short monoliths are used. In this paper, a spatially resolved computational model of monolith channels arranged in series is used to compute the extra pressure drop because of the flow leaving one substrate and entering the next one downstream. Several Reynolds numbers and spacing lengths for the channels between substrates are investigated. According to the results, for close-coupled monoliths, the inlet and outlet effects produce a negligible pressure drop compared to that in a single monolith configuration. This phenomenon can be accounted for by introducing a correction factor. The magnitude of the correction factor depends on the channel’s Reynolds number, diameter, and spacing length. A model for such a factor is proposed. The model accurately predicts the trend and magnitude of the correction factor.

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Multi‐scale modelling of monolith reactors: A 30‐year perspective from 1990 to 2020

Cited by 11 publications

References 97 publications

Process intensification and digital twin – the potential for the energy transition in process industries

Process intensification and digital twin – the potential for the energy transition in process industries

A Model for the Flow Distribution in Dual Cell Density Monoliths

A Model for Correcting the Pressure Drop between Two Monoliths

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