Nitrogen Fixation Through Al2O3–Based Catalysts Embedded in a Microwave Plasma Post–Discharge

alumina; FTIR; metal oxides; nitrogen fixation; OES; plasma catalysis; pulsed-MWP; Haber-Bosch process; Metal-oxide; Microwave plasma; NO x; Plasma catalysis; Postdischarges; Pulsed-MWP; ]+ catalyst; Condensed Matter Physics; Polymers and Plastics

Abstract :

[en] The conventional Haber–Bosch process for nitrogen fixation is energy-intensive and associated with high greenhouse gas emissions. Plasma-assisted catalysis represents an alternative approach for nitrogen oxidation under milder conditions. In this study, catalyst-assisted microwave plasma was investigated using alumina-based catalysts and alumina-supported metal oxides (Mo, W, Co, and Ni). Microwave plasma alone predominantly produced NO, whereas the presence of catalysts promoted additional NO2 formation, indicating the importance of plasma–catalyst interactions. Catalytic performance depended strongly on the physicochemical properties of alumina, with δ-Al2O3 exhibiting the highest activity. Mo- and W-loaded catalysts further enhanced NOx formation, while Ni and Co showed weaker effects. An overall increase of up to ~30% in NOx production was achieved compared to plasma alone.

Disciplines :

Chemistry

Author, co-author :

Sadeghi, Babak ; Université de Mons - UMONS > Faculté des Sciences > Service de Chimie des Interactions Plasma-Surface ; 4MAT Department, Université Libre de Bruxelles, Brussels, Belgium

Snyders, Rony ; Université de Mons - UMONS > Faculté des Sciences > Service de Chimie des Interactions Plasma-Surface ; Materia Nova Research Center, Parc Initialis, Mons, Belgium

Delplancke, Marie–Paule; 4MAT Department, Université Libre de Bruxelles, Brussels, Belgium

Language :

English

Title :

Nitrogen Fixation Through Al2O3–Based Catalysts Embedded in a Microwave Plasma Post–Discharge

Publication date :

February 2026

Journal title :

Plasma Processes and Polymers

ISSN :

1612-8850

eISSN :

1612-8869

Publisher :

John Wiley and Sons Inc

Volume :

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppap.70136

Research unit :

S882 - Chimie des Interactions Plasma-Surface

Research institute :

Matériaux

Funders :

F.R.S.-FNRS - Belgian National Fund for Scientific Research
Fonds Wetenschappelijk Onderzoek

Funding text :

The research is supported by the excellence of science FNRS-FWO program, \u201CNITROPLASM\u201D project, EOS ID: O005118F.

Available on ORBi UMONS :

since 05 July 2026

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