Improvement of three-phase methanation reactor performance for steady-state and transient operation

Lefebvre, Jonathan; Götz, Manuel; Bajohr, S.; Reimert, R.; Kolb, Thomas

doi:10.1016/j.fuproc.2014.10.040

Cited by 97 publications

(50 citation statements)

References 22 publications

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“…The presence of the liquid phase with high heat capacity allows for effective and accurate temperature control: the heat of reaction can be completely removed and the reactor can operate almost isothermally, leading to a simple process design. The challenges with the use of slurry reactors are a result of gas liquid masstransfer resistances and the decomposition and evaporation of the suspension liquid [58,59,75,79].…”

Section: Reactor Conceptsmentioning

confidence: 99%

“…Isothermal reactor concepts may show better temperature regulation under dynamic conditions. Lefebvre et al investigated the dynamic behaviour of a lab-scale three-phase methanation reactor and showed that the reactor temperature does not change even though the gas load at the reactor inlet was varied between 25 and 100% [59]. Consequently, the liquid phase makes the three-phase reactor less sensitive to fluctuating feed streams.…”

Section: Fixed-bedmentioning

confidence: 99%

“…It was shown that the biology, the mass transfer, and/or the chemistry react very fast to load changes [28,59,115,124,125]. Hence, the load change behaviour of a methanation plant is dominated by the plant design and the peripheral equipment, respectively.…”

Section: Load Change Ratementioning

confidence: 99%

“…Lefebvre et al [59] have shown that the reactor time constant depended only on the final gas velocity and the volume of the plant, while the reactor temperature remained isothermal during all transient operations.…”

Section: Load Change Ratementioning

confidence: 99%

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Renewable Power-to-Gas: A technological and economic review

et al. 2016

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a b s t r a c tThe Power-to-Gas (PtG) process chain could play a significant role in the future energy system. Renewable electric energy can be transformed into storable methane via electrolysis and subsequent methanation.This article compares the available electrolysis and methanation technologies with respect to the stringent requirements of the PtG chain such as low CAPEX, high efficiency, and high flexibility.Three water electrolysis technologies are considered: alkaline electrolysis, PEM electrolysis, and solid oxide electrolysis. Alkaline electrolysis is currently the cheapest technology; however, in the future PEM electrolysis could be better suited for the PtG process chain. Solid oxide electrolysis could also be an option in future, especially if heat sources are available.Several different reactor concepts can be used for the methanation reaction. For catalytic methanation, typically fixed-bed reactors are used; however, novel reactor concepts such as three-phase methanation and micro reactors are currently under development. Another approach is the biochemical conversion. The bioprocess takes place in aqueous solutions and close to ambient temperatures.Finally, the whole process chain is discussed. Critical aspects of the PtG process are the availability of CO 2 sources, the dynamic behaviour of the individual process steps, and especially the economics as well as the efficiency.

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Section: Reactor Conceptsmentioning

confidence: 99%

Section: Fixed-bedmentioning

confidence: 99%

Section: Load Change Ratementioning

confidence: 99%

Section: Load Change Ratementioning

confidence: 99%

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Renewable Power-to-Gas: A technological and economic review

et al. 2016

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“…Dabei wird elektrische Energie über die elektrochemische Umsetzung von Wasser in chemische Energie in Form von Wasserstoff und in weiteren Syntheseschritte zu Brenn‐ und Kraftstoffen oder Basischemikalien umgewandelt. In diesem Zusammenhang stellen Blasensäulenreaktoren mit suspendiertem Katalysator für die Fischer‐Tropsch‐, Methan‐ und Methanolsynthese ein vielversprechendes Reaktorkonzept dar . Aufgrund des fluktuierenden Verhaltens der elektrischen Energiebereitstellung aus Wind und Sonne kann der lastflexible Betrieb des PtX‐Prozesses die Kosten für eine notwendige vorgelagerte Wasserstoffspeicherung reduzieren .…”

Section: Introductionunclassified

Hydrodynamik in Blasensäulen – Messung von relativem Gasgehalt und Blasengröße

Mörs

Ortloff

Graf

et al. 2019

Chemie Ingenieur Technik

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Die Kinetik des Stoffübergangs in Blasensäulenreaktoren ist von lokalen, hydrodynamischen Vorgängen (Blasenbildung, ‐aufstieg, ‐koaleszenz, ‐zerfall etc.) geprägt. Um die Einflüsse der Systemgrößen Druck und Feststoffbeladung auf diese Vorgänge besser zu verstehen, ist die Messung der lokalen Blasengröße in opaken Blasenströmungen notwendig. In dieser Arbeit wurde hierzu eine optische Nadelsonde in einer Blasenströmung angewendet. Die Nadelsonde wurde zunächst an Einzelblasen validiert und zeigt vielversprechendes Potenzial, um in Zukunft auf komplexere, opake Stoffsysteme übertragen werden zu können.

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Power‐to‐Chemical Technology

2023

Converting Power Into Chemicals and Fuels

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Improvement of three-phase methanation reactor performance for steady-state and transient operation

Cited by 97 publications

References 22 publications

Renewable Power-to-Gas: A technological and economic review

Renewable Power-to-Gas: A technological and economic review

Hydrodynamik in Blasensäulen – Messung von relativem Gasgehalt und Blasengröße

Power‐to‐Chemical Technology

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