Fischer–Tropsch Synthesis: Effect of the Promoter’s Ionic Charge and Valence Level Energy on Activity
| dc.contributor.author | Ribeiro, Mirtha Z. Leguizamón León | |
| dc.contributor.author | Souza, Joice C. | |
| dc.contributor.author | Gnanamani, Muthu Kumaran | |
| dc.contributor.author | Martinelli, Michela | |
| dc.contributor.author | Upton, Gabriel F. | |
| dc.contributor.author | Jacobs, Gary | |
| dc.contributor.author | Ribeiro, Mauro C. | |
| dc.date.accessioned | 2021-12-23T15:06:24Z | |
| dc.date.available | 2021-12-23T15:06:24Z | |
| dc.date.issued | 2021-10-10 | |
| dc.date.updated | 2021-12-23T15:06:25Z | |
| dc.description.abstract | In this contribution, we examine the effect of the promoter´s ionic charge and valence orbital energy on the catalytic activity of Fe-based catalysts, based on in situ synchrotron X-ray powder diffraction (SXRPD), temperature-programmed-based techniques (TPR, TPD, CO-TP carburization), and Fischer–Tropsch synthesis catalytic testing studies. We compared the promoting effects of K (a known promoter for longer-chained products) with Ba, which has a similar ionic radius but has double the ionic charge. Despite being partially “buried” in a crystalline BaCO3 phase, the carburization of the Ba-promoted catalyst was more effective than that of K; this was primarily due to its higher (2+) ionic charge. With Ba2+, higher selectivity to methane and lighter products were obtained compared to the K-promoted catalysts; this is likely due to Ba´s lesser capability of suppressing H adsorption on the catalyst surface. An explanation is provided in terms of a more limited mixing between electron-filled Ba2+ 5p and partially filled Fe 3d orbitals, which are expected to be important for the chemical promotion, as they are further apart in energy compared to the K+ 3p and Fe 3d orbitals. | |
| dc.description.department | Biomedical Engineering and Chemical Engineering | |
| dc.description.department | Mechanical Engineering | |
| dc.identifier | doi: 10.3390/reactions2040026 | |
| dc.identifier.citation | Reactions 2 (4): 408-426 (2021) | |
| dc.identifier.uri | https://hdl.handle.net/20.500.12588/776 | |
| dc.rights | Attribution 4.0 United States | |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
| dc.subject | Fischer–Tropsch synthesis | |
| dc.subject | iron | |
| dc.subject | alkali | |
| dc.subject | ion valance | |
| dc.subject | alkali-earth | |
| dc.subject | promoter | |
| dc.title | Fischer–Tropsch Synthesis: Effect of the Promoter’s Ionic Charge and Valence Level Energy on Activity | |
| dc.type | Article |