CO Removal from Hydrogen Stream through Methanation on Ru/C Catalysts Doped with Lanthanum and Barium

The influence of the lanthanum and barium addition on the physicochemical properties and catalytic behavior of the Ru/C catalyst for CO methanation was investigated. The catalyst was doped with La or with La plus Ba. It was found out that there are various ways the additives were applied in the stud...

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Bibliographic Details
Published in:Hydrogen 2023-06, Vol.4 (2), p.389-407
Main Authors: Truszkiewicz, Elżbieta, Bielecka, Aleksandra, Iwanek (nee Wilczkowska), Ewa M., Ojrzyńska, Milena, Ostrowski, Andrzej
Format: Article
Language:English
Subjects:
Additives
Ammonia industry
Barium
Carbon
Carbon dioxide
carbon support
Catalysts
Catalytic activity
Chemisorption
CO methanation
Emissions
Energy consumption
Hydrogen
Hydrogenation
Influence
La and Ba additives
Lanthanum
Manufacturing
Methanation
Particle size
Raman spectroscopy
ruthenium catalyst
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Summary:The influence of the lanthanum and barium addition on the physicochemical properties and catalytic behavior of the Ru/C catalyst for CO methanation was investigated. The catalyst was doped with La or with La plus Ba. It was found out that there are various ways the additives were applied in the study, thus changing the catalytic performance of the basic material and influencing the susceptibility of the carbon support in relation to undesired methanation. The highest catalytic activity, 23.46 (mmol CO/gC+Ru × h), was achieved for the LaRu/C system, with methane selectivity exceeding 80% over the whole temperature range. Ba addition caused a significant decrease in activity. TG-MS studies revealed that both La and Ba improved the resistance of the carbon support to undesired methanation. Detailed characterization methods, employing XRPD, Raman spectroscopy, CO chemisorption, and SEM-EDX, showed that the catalytic behavior of the studied catalysts was attributed to lanthanum distribution over the Ru/C materials surface and structural changes in the carbon support affecting electron supply to the metallic active phase.
ISSN:2673-4141
2673-4141
DOI:10.3390/hydrogen4020027