Influence of Magnesium Oxide on the Structure and Catalytic Activity of the Wustite Catalyst for Ammonia Synthesis

Autor:	Artur Jurkowski, Aleksander Albrecht, Dariusz Moszyński, Rafał Pelka, Zofia Lendzion-Bieluń
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	ammonia synthesis wustite magnesium oxide Technology Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
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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