On the kinetics of the methanation of carbon dioxide on coprecipitated NiAl(O)

Koschany, Franz; Schlereth, David; Hinrichsen, Olaf

doi:10.1016/j.apcatb.2015.07.026

Cited by 228 publications

(192 citation statements)

References 53 publications

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“…Several studies [1][2][3][4][5][6][7][8][9] and recent reviews [10][11][12][13][14] have focused on the methanation reaction, mainly due to its important implications for energy and the environment. Methanation processes produce methane (Substitute or Synthetic Natural Gas, SNG) from hydrogen and CO x .…”

Section: Introductionmentioning

confidence: 99%

Supported Catalysts for CO2 Methanation: A Review

et al. 2017

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CO 2 methanation is a well-known reaction that is of interest as a capture and storage (CCS) process and as a renewable energy storage system based on a power-to-gas conversion process by substitute or synthetic natural gas (SNG) production. Integrating water electrolysis and CO 2 methanation is a highly effective way to store energy produced by renewables sources. The conversion of electricity into methane takes place via two steps: hydrogen is produced by electrolysis and converted to methane by CO 2 methanation. The effectiveness and efficiency of power-to-gas plants strongly depend on the CO 2 methanation process. For this reason, research on CO 2 methanation has intensified over the last 10 years. The rise of active, selective, and stable catalysts is the core of the CO 2 methanation process. Novel, heterogeneous catalysts have been tested and tuned such that the CO 2 methanation process increases their productivity. The present work aims to give a critical overview of CO 2 methanation catalyst production and research carried out in the last 50 years. The fundamentals of reaction mechanism, catalyst deactivation, and catalyst promoters, as well as a discussion of current and future developments in CO 2 methanation, are also included.

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Section: Introductionmentioning

confidence: 99%

Supported Catalysts for CO2 Methanation: A Review

et al. 2017

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“…The evaluation of the kinetic data by using an Arrhenius plot between 220 and 250 °C (Figure S3) resulted in an apparent activation energy for the CO 2 methanation of (83±7) kJ mol −1 . This value is comparable to those reported for other Ni catalysts, for example, 80 kJ mol −1 for commercial Ni/Al 2 O 3 , 83 kJ mol −1 for coprecipitated Ni/Al 2 O 3 , and 89 kJ mol −1 for a Ni(1 0 0) surface …”

Section: Figurementioning

confidence: 99%

Methanation of CO₂ over a (Mg,Al)O_x Supported Nickel Catalyst Derived from a (Ni,Mg,Al)‐Hydrotalcite‐like Precursor

et al. 2016

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The CO2 methanation performance of a Ni catalyst supported on a Lewis basic (Mg,Al)Ox mixed oxide derived from a (Ni,Mg,Al)‐hydrotalcite‐like (HTL) precursor was investigated. The HTL structure of the precursor, synthesized by pH‐controlled coprecipitation, was confirmed by using XRD. Reduction at 900 °C led to metallic Ni particles supported on a spinel‐type (Mg,Al)Ox matrix. Catalytic measurements between 210 and 400 °C revealed a reproducible CO2 conversion into CH4. Kinetic analysis of the data in the lower temperature range resulted in an apparent activation energy of (83±7) kJ mol−1 for this reaction. After a latency period of 10 h, the catalyst showed excellent long‐term stability for up to 50 h on stream under methanation conditions.

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“…Nach Koschany et al [34] unterliegt die Methanisierung im betrachteten Bereich weder Stoff-noch Wärmetransportlimitierungen und die entsprechenden Kriterien wie Weisz-Prater bzw. Abb.…”

Section: Einfluss Des Volumenstromsunclassified

“…Ein äußerer Stofftransportwiderstand wird aufgrund der Erfüllung der verwendeten Kritierien ausgeschlossen[34].In Abb. Maximale Temperaturerhö hung ΔT max in Abhä ngigkeit des Reaktandenvolumenstroms.gungen im Reaktor eingestellt und es findet keine Ä nderung von T max mehr statt.…”

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Entwicklung eines optisch zugänglichen Reaktors zur Thermographiemessung in einer Katalysatorschüttung

Schüler

Hinrichsen

2016

Chemie Ingenieur Technik

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Um die intrinsische Kinetik bei heterogen-katalysierten stark exothermen Gasphasenreaktionen messen zu können, sollten sowohl Stoff-als auch Wärmetransportlimitierungen vermieden werden. Auch eine Ungleichverteilung der Temperatur im Katalysatorbett, wie sie durch Hotspots verursacht wird, wirkt sich verfälschend auf diese Ergebnisse aus. Eine vielversprechende Technik zur kontaktlosen Temperaturmessung ist die Thermographie. Im Rahmen dieser Arbeit wurde diese Technik verwendet, um die Temperaturentwicklung und -verteilung während der stark exothermen CO 2 -Methanisierung in Abhängigkeit der Bett-und Feedgasverdünnung sowie der Katalysatorbelastung zu untersuchen.To measure the microkinetics in heterogeneously catalyzed strongly exothermic gas phase reaction heat and mass transfer limitations should be excluded. Also an unequal distribution of temperature in the catalyst fixed bed, like a hot spot, distorts the results of microkinetic investigations. A promising approach to measure the temperature contactless is thermography. For this work, an optically accessible reactor is developed to measure the temperature in a catalytically powder fixed bed. In the scope of this work, this technique is used to investigate the temperature development and distribution during the exothermal CO 2 methanation depending on the bed and gas dilution and the reactor performance.

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On the kinetics of the methanation of carbon dioxide on coprecipitated NiAl(O)

Cited by 228 publications

References 53 publications

Supported Catalysts for CO2 Methanation: A Review

Supported Catalysts for CO2 Methanation: A Review

Methanation of CO₂ over a (Mg,Al)O_x Supported Nickel Catalyst Derived from a (Ni,Mg,Al)‐Hydrotalcite‐like Precursor

Entwicklung eines optisch zugänglichen Reaktors zur Thermographiemessung in einer Katalysatorschüttung

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On the kinetics of the methanation of carbon dioxide on coprecipitated NiAl(O)

Cited by 228 publications

References 53 publications

Supported Catalysts for CO2 Methanation: A Review

Supported Catalysts for CO2 Methanation: A Review

Methanation of CO2 over a (Mg,Al)Ox Supported Nickel Catalyst Derived from a (Ni,Mg,Al)‐Hydrotalcite‐like Precursor

Entwicklung eines optisch zugänglichen Reaktors zur Thermographiemessung in einer Katalysatorschüttung

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Methanation of CO₂ over a (Mg,Al)O_x Supported Nickel Catalyst Derived from a (Ni,Mg,Al)‐Hydrotalcite‐like Precursor