Reaction Mechanism Development for Methane Steam Reforming on a Ni/Al2O3 Catalyst

Richter, Jana; Rachow, Fabian; Israel, Johannes; Roth, Norbert; Charlafti, Evgenia; Günther, Vivien; Flege, Jan Ingo; Mauss, Fabian

doi:10.3390/catal13050884

Open AccessArticle

Reaction Mechanism Development for Methane Steam Reforming on a Ni/Al₂O₃ Catalyst

by

Jana Richter

^1,*

,

Fabian Rachow

²

,

Johannes Israel

²,

Norbert Roth

¹,

Evgenia Charlafti

²

,

Vivien Günther

³

,

Jan Ingo Flege

²

and

Fabian Mauss

¹

Department of Thermodynamics/Thermal Process Engineering, Brandenburg University of Technology Cottbus—Senftenberg, Siemens-Halske-Ring 8, D-03046 Cottbus, Germany

²

Department of Applied Physics and Semiconductor Spectroscopy, Brandenburg University of Technology Cottbus—Senftenberg, K.-Zuse-Straße 1, D-03046 Cottbus, Germany

³

LOGE Deutschland GmbH, Querstraße 48, 03044 Cottbus, Germany

^*

Author to whom correspondence should be addressed.

Catalysts 2023, 13(5), 884; https://doi.org/10.3390/catal13050884

Submission received: 29 March 2023 / Revised: 4 May 2023 / Accepted: 5 May 2023 / Published: 13 May 2023

(This article belongs to the Topic Surface Chemistry of Catalysis)

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Abstract

In this work, a reliable kinetic reaction mechanism was revised to accurately reproduce the detailed reaction paths of steam reforming of methane over a Ni/Al

_{2}

O

_{3}

catalyst. A steady-state fixed-bed reactor experiment and a 1D reactor catalyst model were utilized for this task. The distinctive feature of this experiment is the possibility to measure the axially resolved temperature profile of the catalyst bed, which makes the reaction kinetics inside the reactor visible. This allows for understanding the actual influence of the reaction kinetics on the system; while pure gas concentration measurements at the catalytic reactor outlet show near-equilibrium conditions, the inhere presented temperature profile shows that it is insufficient to base a reaction mechanism development on close equilibrium data. The new experimental data allow for achieving much higher quality in the modeling efforts. Additionally, by carefully controlling the available active surface via dilution in the experiment, it was possible to slow down the catalyst conversion rate, which helped during the adjustment of the reaction kinetics. To assess the accuracy of the revised mechanism, a monolith experiment from the literature was simulated. The results show that the fitted reaction mechanism was able to accurately predict the experimental outcomes for various inlet mass flows, temperatures, and steam-to-carbon ratios.

Keywords: kinetic reaction mechanism development; 1D modeling; reaction rates; methane steam reforming; fixed-bed reactor experiments; nickel catalyst

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MDPI and ACS Style

Richter, J.; Rachow, F.; Israel, J.; Roth, N.; Charlafti, E.; Günther, V.; Flege, J.I.; Mauss, F. Reaction Mechanism Development for Methane Steam Reforming on a Ni/Al₂O₃ Catalyst. Catalysts 2023, 13, 884. https://doi.org/10.3390/catal13050884

AMA Style

Richter J, Rachow F, Israel J, Roth N, Charlafti E, Günther V, Flege JI, Mauss F. Reaction Mechanism Development for Methane Steam Reforming on a Ni/Al₂O₃ Catalyst. Catalysts. 2023; 13(5):884. https://doi.org/10.3390/catal13050884

Chicago/Turabian Style

Richter, Jana, Fabian Rachow, Johannes Israel, Norbert Roth, Evgenia Charlafti, Vivien Günther, Jan Ingo Flege, and Fabian Mauss. 2023. "Reaction Mechanism Development for Methane Steam Reforming on a Ni/Al₂O₃ Catalyst" Catalysts 13, no. 5: 884. https://doi.org/10.3390/catal13050884

APA Style

Richter, J., Rachow, F., Israel, J., Roth, N., Charlafti, E., Günther, V., Flege, J. I., & Mauss, F. (2023). Reaction Mechanism Development for Methane Steam Reforming on a Ni/Al₂O₃ Catalyst. Catalysts, 13(5), 884. https://doi.org/10.3390/catal13050884

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Reaction Mechanism Development for Methane Steam Reforming on a Ni/Al₂O₃ Catalyst

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