A Design of Experiment-Driven Optimization of NiMnAl Mixed Metal Oxide Catalysts for CO2 Methanation

Weber D, Asadli A, Seitz A, Hutzler A, Schühle P, Franken T (2025)

Publication Type: Journal article

Publication year: 2025

Journal

ChemCatChem Wiley-VCH Verlag

DOI: 10.1002/cctc.202501334

Abstract

Power-to-gas technologies, including CO2 methanation, offer a promising strategy for mitigating anthropogenic climate change. Nickel-based mixed metal oxide catalysts have demonstrated high activity, selectivity and stability in this challenging reaction in recent years. This study investigates the effects of synthesis parameters on the structure, activation, and reaction behavior of NiMnAl mixed metal oxide (MMO) catalysts. A Design of Experiment approach was employed to systematically vary the calcination temperature (500–950 °C), pH (8–10), and aging time (1–30 h) during synthesis by coprecipitation, resulting in the synthesis and testing of approximately 35 catalysts. The calcination temperature determines the catalyst structure, with metastable NiAl phases forming up to 650 °C and spinel phases forming above 800 °C. Notably, the spinel NiMnAl MMO catalysts exhibit superior performance, achieving approximately 60% higher methane formation rates per gram Ni of the catalyst compared to a supported industrial methanation reference catalyst (SPP2080-IMRC). Comprehensive characterization using XRD, elemental analysis, N2 physisorption, TPR, CO2-TPD, N2O chemisorption, and STEM-EDXS provide insights into the catalysts' properties and activity.

Authors with CRIS profile

Dennis Weber Juniorprofessur für katalytische und elektrokatalytische Systeme und Verfahren Adrian Seitz Lehrstuhl für Chemische Reaktionstechnik (CRT) Patrick Schühle Lehrstuhl für Chemische Reaktionstechnik (CRT)

Involved external institutions

Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE) Technische Universität Darmstadt DE Germany (DE)

How to cite

APA:

Weber, D., Asadli, A., Seitz, A., Hutzler, A., Schühle, P., & Franken, T. (2025). A Design of Experiment-Driven Optimization of NiMnAl Mixed Metal Oxide Catalysts for CO2 Methanation. ChemCatChem. https://doi.org/10.1002/cctc.202501334

MLA:

Weber, Dennis, et al. "A Design of Experiment-Driven Optimization of NiMnAl Mixed Metal Oxide Catalysts for CO2 Methanation." ChemCatChem (2025).

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