Catalytic Fixed‐Bed Reactors

Eigenberger, Gerhart

doi:10.1002/9783527610044.hetcat0111

Cited by 27 publications

(24 citation statements)

References 55 publications

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“…Thermochemical heat storage systems with respect to system configuration can be divided in open and closed systems [274,290,291]. Open systems work at atmospheric pressure in contact with the environment while closed ones work with pure vapor, circulating in hermetically closed loops, at vacuum pressure [292].…”

Section: Thermochemical Heat Storage Systemsmentioning

confidence: 99%

A Review of Thermochemical Energy Storage Systems for Power Grid Support

et al. 2020

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Power systems in the future are expected to be characterized by an increasing penetration of renewable energy sources systems. To achieve the ambitious goals of the “clean energy transition”, energy storage is a key factor, needed in power system design and operation as well as power-to-heat, allowing more flexibility linking the power networks and the heating/cooling demands. Thermochemical systems coupled to power-to-heat are receiving an increasing attention due to their better performance in comparison with sensible and latent heat storage technologies, in particular, in terms of storage time dynamics and energy density. In this work, a comprehensive review of the state of art of theoretical, experimental and numerical studies available in literature on thermochemical thermal energy storage systems and their use in power-to-heat applications is presented with a focus on applications with renewable energy sources. The paper shows that a series of advantages such as additional flexibility, load management, power quality, continuous power supply and a better use of variable renewable energy sources could be crucial elements to increase the commercial profitability of these storage systems. Moreover, specific challenges, i.e., life span and stability of storage material and high cost of power-to-heat/thermochemical systems must be taken in consideration to increase the technology readiness level of this emerging concept of energy systems integration.

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Section: Thermochemical Heat Storage Systemsmentioning

confidence: 99%

A Review of Thermochemical Energy Storage Systems for Power Grid Support

et al. 2020

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“…The various models of catalytic reactors that include both inter‐phase heat and mass transfer resistances and intra‐particle diffusional effects were discussed in the literature . Here, we use a cell model that accounts for finite size of the particles (and dispersion effects in the fluid phase), includes inter‐phase heat and transfer resistances, and intra‐phase mass transfer (diffusional resistance).…”

Section: Model Developmentmentioning

confidence: 99%

Scale‐up analysis of autothermal operation of methane oxidative coupling with La₂O₃/CaO catalyst

et al. 2020

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The exothermicity of oxidative coupling of methane (OCM) renders a cooled packedbed reactor impractical or impossible. Recently, we proposed an adiabatic autothermal reactor as a solution to this problem and reported the first results for stable autothermal operation (AO) with feed at ambient temperature. AO on the ignited branch is possible only in the region of steady-state multiplicity. High per-pass conversion and productivity requirements demand a stable ignited branch at the lowest possible feed temperature and high flow rate. To achieve OCM scale-up, many conditions must be satisfied simultaneously. Using a kinetic model for La 2 O 3 /CaO catalyst, we examine the impact of space time, feed methane to oxygen ratio, feed temperature, particle size, inter-phase heat and mass transfer gradients, pore-diffusion, bed scale heat/mass dispersion on the region of AO for large scale adiabatic packed-bed reactors. We show that while it is possible to achieve CH 4 conversion of about 20% and C 2 selectivity of about 80% in scaled-up reactors, these values are sensitive to the design and operating parameters. K E Y W O R D S autothermal operation, extinction, ignition, mass transfer control, oxidative coupling, pore diffusion

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“…ey also find a better alternate for large-scale manufacturing of basic chemicals and intermediates as well as for the removal of harmful or toxic chemicals from gas or liquid streams [5].…”

Section: Introductionmentioning

confidence: 99%

Modeling Residence Time Distribution (RTD) Behavior in a Packed-Bed Electrochemical Reactor (PBER)

Menon

Madhu

Mathew

2019

International Journal of Chemical Engineering

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This paper focuses on understanding the electrolyte flow characteristics in a typical packed-bed electrochemical reactor using Residence Time Distribution (RTD) studies. RTD behavior was critically analyzed using tracer studies at various flow rates, initially under nonelectrolyzing conditions. Validation of these results using available theoretical models was carried out. Significant disparity in RTD curves under electrolyzing conditions was examined and details are recorded. Finally, a suitable mathematical model (Modified Dispersed Plug Flow Model (MDPFM)) was developed for validating these results under electrolyzing conditions.

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Catalytic Fixed‐Bed Reactors

Abstract: The sections in this article are Introduction Catalyst Shapes for Fixed‐Bed Reactors Random Packings Monoliths Gas Flow and Pressure Drop in Fixed Beds Heat Transfer in Catalyst‐Filled Tubes Comparison of Different Catalyst Shapes … Show more

Cited by 27 publications

References 55 publications

A Review of Thermochemical Energy Storage Systems for Power Grid Support

A Review of Thermochemical Energy Storage Systems for Power Grid Support

Scale‐up analysis of autothermal operation of methane oxidative coupling with La₂O₃/CaO catalyst

Modeling Residence Time Distribution (RTD) Behavior in a Packed-Bed Electrochemical Reactor (PBER)

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Catalytic Fixed‐Bed Reactors

Abstract: The sections in this article are Introduction Catalyst Shapes for Fixed‐Bed Reactors Random Packings Monoliths Gas Flow and Pressure Drop in Fixed Beds Heat Transfer in Catalyst‐Filled Tubes Comparison of Different Catalyst Shapes … Show more

Cited by 27 publications

References 55 publications

A Review of Thermochemical Energy Storage Systems for Power Grid Support

A Review of Thermochemical Energy Storage Systems for Power Grid Support

Scale‐up analysis of autothermal operation of methane oxidative coupling with La2O3/CaO catalyst

Modeling Residence Time Distribution (RTD) Behavior in a Packed-Bed Electrochemical Reactor (PBER)

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Product

Resources

About

Scale‐up analysis of autothermal operation of methane oxidative coupling with La₂O₃/CaO catalyst