Cobalt-lanthanum catalyst precursors for ammonia synthesis: determination of calcination temperature and storage conditions
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 tran...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Sciendo
2017-06-01
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| Series: | Polish Journal of Chemical Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/pjct-2017-0029 |
| _version_ | 1819115261586833408 |
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| author | Zybert Magdalena Tarka Aleksandra Mierzwa Bogusław Raróg-Pilecka Wioletta |
| author_facet | Zybert Magdalena Tarka Aleksandra Mierzwa Bogusław Raróg-Pilecka Wioletta |
| author_sort | Zybert Magdalena |
| collection | DOAJ |
| description | 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 Co3O4, but it leads to only partial decomposition of lanthanum precipitate. In order to obtain Co/La catalyst precursor containing La2O3 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 La2O3 when contacting with air, was observed. |
| first_indexed | 2024-12-22T04:58:23Z |
| format | Article |
| id | doaj.art-4b5871b6462b456da9c46a7ca26d6139 |
| institution | Directory Open Access Journal |
| issn | 1899-4741 |
| language | English |
| last_indexed | 2024-12-22T04:58:23Z |
| publishDate | 2017-06-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Polish Journal of Chemical Technology |
| spelling | doaj.art-4b5871b6462b456da9c46a7ca26d61392022-12-21T18:38:19ZengSciendoPolish Journal of Chemical Technology1899-47412017-06-01192616610.1515/pjct-2017-0029pjct-2017-0029Cobalt-lanthanum catalyst precursors for ammonia synthesis: determination of calcination temperature and storage conditionsZybert Magdalena0Tarka Aleksandra1Mierzwa Bogusław2Raróg-Pilecka Wioletta3Warsaw University of Technology, Faculty of Chemistry, Noakowskiego 3, 00-664Warsaw, PolandWarsaw University of Technology, Faculty of Chemistry, Noakowskiego 3, 00-664Warsaw, PolandInstitute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224Warsaw, PolandWarsaw University of Technology, Faculty of Chemistry, Noakowskiego 3, 00-664Warsaw, PolandA 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 Co3O4, but it leads to only partial decomposition of lanthanum precipitate. In order to obtain Co/La catalyst precursor containing La2O3 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 La2O3 when contacting with air, was observed.https://doi.org/10.1515/pjct-2017-0029ammonia synthesiscatalyst precursorcobaltlanthanumthermal analysis |
| spellingShingle | Zybert Magdalena Tarka Aleksandra Mierzwa Bogusław Raróg-Pilecka Wioletta Cobalt-lanthanum catalyst precursors for ammonia synthesis: determination of calcination temperature and storage conditions Polish Journal of Chemical Technology ammonia synthesis catalyst precursor cobalt lanthanum thermal analysis |
| title | Cobalt-lanthanum catalyst precursors for ammonia synthesis: determination of calcination temperature and storage conditions |
| title_full | Cobalt-lanthanum catalyst precursors for ammonia synthesis: determination of calcination temperature and storage conditions |
| title_fullStr | Cobalt-lanthanum catalyst precursors for ammonia synthesis: determination of calcination temperature and storage conditions |
| title_full_unstemmed | Cobalt-lanthanum catalyst precursors for ammonia synthesis: determination of calcination temperature and storage conditions |
| title_short | Cobalt-lanthanum catalyst precursors for ammonia synthesis: determination of calcination temperature and storage conditions |
| title_sort | cobalt lanthanum catalyst precursors for ammonia synthesis determination of calcination temperature and storage conditions |
| topic | ammonia synthesis catalyst precursor cobalt lanthanum thermal analysis |
| url | https://doi.org/10.1515/pjct-2017-0029 |
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