Passivation of Co/Al<sub>2</sub>O<sub>3</sub> Catalyst by Atomic Layer Deposition to Reduce Deactivation in the Fischer–Tropsch Synthesis
The present work explores the technical feasibility of passivating a Co/γ-Al<sub>2</sub>O<sub>3</sub> catalyst by atomic layer deposition (ALD) to reduce deactivation rate during Fischer–Tropsch synthesis (FTS). Three samples of the reference catalyst were passivated using di...
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MDPI AG
2021-06-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/11/6/732 |
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| author | José Antonio Díaz-López Jordi Guilera Martí Biset-Peiró Dan Enache Gordon Kelly Teresa Andreu |
| author_facet | José Antonio Díaz-López Jordi Guilera Martí Biset-Peiró Dan Enache Gordon Kelly Teresa Andreu |
| author_sort | José Antonio Díaz-López |
| collection | DOAJ |
| description | The present work explores the technical feasibility of passivating a Co/γ-Al<sub>2</sub>O<sub>3</sub> catalyst by atomic layer deposition (ALD) to reduce deactivation rate during Fischer–Tropsch synthesis (FTS). Three samples of the reference catalyst were passivated using different numbers of ALD cycles (3, 6 and 10). Characterization results revealed that a shell of the passivating agent (Al<sub>2</sub>O<sub>3</sub>) grew around catalyst particles. This shell did not affect the properties of passivated samples below 10 cycles, in which catalyst reduction was hindered. Catalytic tests at 50% CO conversion evidenced that 3 and 6 ALD cycles increased catalyst stability without significantly affecting the catalytic performance, whereas 10 cycles caused blockage of the active phase that led to a strong decrease of catalytic activity. Catalyst deactivation modelling and tests at 60% CO conversion served to conclude that 3 to 6 ALD cycles reduced Co/γ-Al<sub>2</sub>O<sub>3</sub> deactivation, so that the technical feasibility of this technique was proven in FTS. |
| first_indexed | 2024-03-10T10:25:42Z |
| format | Article |
| id | doaj.art-bda2541e5e0d43f4a981f1c1d6868626 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T10:25:42Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-bda2541e5e0d43f4a981f1c1d68686262023-11-22T00:05:06ZengMDPI AGCatalysts2073-43442021-06-0111673210.3390/catal11060732Passivation of Co/Al<sub>2</sub>O<sub>3</sub> Catalyst by Atomic Layer Deposition to Reduce Deactivation in the Fischer–Tropsch SynthesisJosé Antonio Díaz-López0Jordi Guilera1Martí Biset-Peiró2Dan Enache3Gordon Kelly4Teresa Andreu5Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930 Sant Adrià de Besòs, SpainCatalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930 Sant Adrià de Besòs, SpainCatalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930 Sant Adrià de Besòs, SpainJohnson Matthey, Belasis Avenue, Stockton-on-Tees, Billingham TS23 1LH, UKJohnson Matthey, Belasis Avenue, Stockton-on-Tees, Billingham TS23 1LH, UKCatalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, 08930 Sant Adrià de Besòs, SpainThe present work explores the technical feasibility of passivating a Co/γ-Al<sub>2</sub>O<sub>3</sub> catalyst by atomic layer deposition (ALD) to reduce deactivation rate during Fischer–Tropsch synthesis (FTS). Three samples of the reference catalyst were passivated using different numbers of ALD cycles (3, 6 and 10). Characterization results revealed that a shell of the passivating agent (Al<sub>2</sub>O<sub>3</sub>) grew around catalyst particles. This shell did not affect the properties of passivated samples below 10 cycles, in which catalyst reduction was hindered. Catalytic tests at 50% CO conversion evidenced that 3 and 6 ALD cycles increased catalyst stability without significantly affecting the catalytic performance, whereas 10 cycles caused blockage of the active phase that led to a strong decrease of catalytic activity. Catalyst deactivation modelling and tests at 60% CO conversion served to conclude that 3 to 6 ALD cycles reduced Co/γ-Al<sub>2</sub>O<sub>3</sub> deactivation, so that the technical feasibility of this technique was proven in FTS.https://www.mdpi.com/2073-4344/11/6/732Fischer–Tropschatomic layer depositiondeactivationsynthetic fuelscobalt catalystpassivation |
| spellingShingle | José Antonio Díaz-López Jordi Guilera Martí Biset-Peiró Dan Enache Gordon Kelly Teresa Andreu Passivation of Co/Al<sub>2</sub>O<sub>3</sub> Catalyst by Atomic Layer Deposition to Reduce Deactivation in the Fischer–Tropsch Synthesis Catalysts Fischer–Tropsch atomic layer deposition deactivation synthetic fuels cobalt catalyst passivation |
| title | Passivation of Co/Al<sub>2</sub>O<sub>3</sub> Catalyst by Atomic Layer Deposition to Reduce Deactivation in the Fischer–Tropsch Synthesis |
| title_full | Passivation of Co/Al<sub>2</sub>O<sub>3</sub> Catalyst by Atomic Layer Deposition to Reduce Deactivation in the Fischer–Tropsch Synthesis |
| title_fullStr | Passivation of Co/Al<sub>2</sub>O<sub>3</sub> Catalyst by Atomic Layer Deposition to Reduce Deactivation in the Fischer–Tropsch Synthesis |
| title_full_unstemmed | Passivation of Co/Al<sub>2</sub>O<sub>3</sub> Catalyst by Atomic Layer Deposition to Reduce Deactivation in the Fischer–Tropsch Synthesis |
| title_short | Passivation of Co/Al<sub>2</sub>O<sub>3</sub> Catalyst by Atomic Layer Deposition to Reduce Deactivation in the Fischer–Tropsch Synthesis |
| title_sort | passivation of co al sub 2 sub o sub 3 sub catalyst by atomic layer deposition to reduce deactivation in the fischer tropsch synthesis |
| topic | Fischer–Tropsch atomic layer deposition deactivation synthetic fuels cobalt catalyst passivation |
| url | https://www.mdpi.com/2073-4344/11/6/732 |
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