Autor: |
Artur Jurkowski, Aleksander Albrecht, Dariusz Moszyński, Rafał Pelka, Zofia Lendzion-Bieluń |
Jazyk: |
angličtina |
Rok vydání: |
2022 |
Předmět: |
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Zdroj: |
Materials, Vol 15, Iss 23, p 8309 (2022) |
Druh dokumentu: |
article |
ISSN: |
1996-1944 |
DOI: |
10.3390/ma15238309 |
Popis: |
The influence of a magnesium oxide admixture on the activation process and catalytic activity of the iron catalyst with a wustite structure was investigated during the ammonia synthesis reaction. The incorporation of magnesium oxide into wustite grains is considered to be a structure-forming and activating promoter. It stabilizes the α-Fe structure and increases the activity of the catalysts in the ammonia synthesis reaction. Moreover, magnesium oxide forms a solid solution with the wustite, which slows down the reduction of a catalyst precursor. Similar to calcium and potassium compounds, magnesium oxide is present on the α-Fe surface of the active form of the catalyst. The optimum MgO concentration in the catalyst structure was determined to be 1.2% wt. |
Databáze: |
Directory of Open Access Journals |
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