- Tytuł:
- Cobalt-lanthanum catalyst precursors for ammonia synthesis: determination of calcination temperature and storage conditions
- Autorzy:
-
Zybert, M.
Tarka, A.
Mierzwa, B.
Raróg-Pilecka, W. - Powiązania:
- https://bibliotekanauki.pl/articles/778044.pdf
- Data publikacji:
- 2017
- Wydawca:
- Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
- Tematy:
-
ammonia synthesis
catalyst precursor
cobalt
lanthanum
thermal analysis - Opis:
- A thermal decomposition of a cobalt-lanthanum catalyst precursor containing a mixture of cobalt and lanthanum compounds obtained by co-precipitation were studied using thermal analysis coupled with mass spectrometry (TG-MS). Studies revealed that the calcination in air at 500°C is sufficient to transform the obtained cobalt precipitate into Co3 O4 , but it leads to only partial decomposition of lanthanum precipitate. In order to obtain Co/La catalyst precursor containing La2 O3 the calcination in air at the temperature about 800°C is required. However, it is unfavorable from the point of view of textural properties of the catalyst precursor. A strong effect of storage conditions on the phase composition of the studied cobalt-lanthanum catalyst precursor, caused by the formation of lanthanum hydroxide and lanthanum carbonates from La2 O3 when contacting with air, was observed.
- Źródło:
-
Polish Journal of Chemical Technology; 2017, 19, 2; 61-66
1509-8117
1899-4741 - Pojawia się w:
- Polish Journal of Chemical Technology
- Dostawca treści:
- Biblioteka Nauki
Artykuł