In Situ H2 Reduction of Al2O3-Supported Ni- and Mo-Based Catalysts
(2022) In Catalysts 12(7).- Abstract
Nickel (Ni)-promoted Molybdenum (Mo)-based catalysts are used for hydrotreatment processes in the chemical industry where the catalysts are exposed to high-pressure H2 at elevated temperature. In this environment, the catalyst transforms into the active phase, which involves the reduction of the oxide. Here, we report on the first in situ study on the reduction of alumina supported Ni- and Mo-based catalysts in 1 mbar H2 using ambient-pressure X-ray photoelectron spectroscopy (APXPS). The study confirms that mixing Ni and Mo lowers the reduction temperature of both Ni- and Mo-oxide as compared to the monometallic catalysts and shows that the MoO3 reduction starts at a lower temperature than the reduction... (More)
Nickel (Ni)-promoted Molybdenum (Mo)-based catalysts are used for hydrotreatment processes in the chemical industry where the catalysts are exposed to high-pressure H2 at elevated temperature. In this environment, the catalyst transforms into the active phase, which involves the reduction of the oxide. Here, we report on the first in situ study on the reduction of alumina supported Ni- and Mo-based catalysts in 1 mbar H2 using ambient-pressure X-ray photoelectron spectroscopy (APXPS). The study confirms that mixing Ni and Mo lowers the reduction temperature of both Ni- and Mo-oxide as compared to the monometallic catalysts and shows that the MoO3 reduction starts at a lower temperature than the reduction of NiO in NiMo/Al2O3 catalysts. Additionally, the reduction of Ni and Mo foil was directly compared to the reduction of the Al2O3-supported catalysts and it was observed that the reduction of the supported catalysts is more gradual than the reduction of the foils, indicating a strong interaction between the Ni/Mo and the alumina support.
(Less)
- author
- organization
-
- LTH Profile Area: The Energy Transition
- Combustion Physics
- LTH Profile Area: Nanoscience and Semiconductor Technology
- Ergonomics and Aerosol Technology
- NanoLund: Centre for Nanoscience
- Solid State Physics
- Division of Chemical Engineering
- MAX IV Laboratory
- LTH Profile Area: Photon Science and Technology
- publishing date
- 2022-07
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- APXPS, bimetallic catalysts, catalysis, in situ, NiMo-alumina, reduction, X-ray-based methods, XANES
- in
- Catalysts
- volume
- 12
- issue
- 7
- article number
- 755
- publisher
- MDPI AG
- external identifiers
-
- scopus:85136432255
- ISSN
- 2073-4344
- DOI
- 10.3390/catal12070755
- project
- Nano Design meets Organic Chemistry for Greener Catalysts
- Combined techniques for studies of catalysis
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2022 by the authors.
- id
- 5e325b44-8ad9-46e8-be6a-0a3e24963f75
- date added to LUP
- 2022-09-20 00:34:11
- date last changed
- 2023-12-20 04:50:57
@article{5e325b44-8ad9-46e8-be6a-0a3e24963f75, abstract = {{<p>Nickel (Ni)-promoted Molybdenum (Mo)-based catalysts are used for hydrotreatment processes in the chemical industry where the catalysts are exposed to high-pressure H<sub>2</sub> at elevated temperature. In this environment, the catalyst transforms into the active phase, which involves the reduction of the oxide. Here, we report on the first in situ study on the reduction of alumina supported Ni- and Mo-based catalysts in 1 mbar H<sub>2</sub> using ambient-pressure X-ray photoelectron spectroscopy (APXPS). The study confirms that mixing Ni and Mo lowers the reduction temperature of both Ni- and Mo-oxide as compared to the monometallic catalysts and shows that the MoO<sub>3</sub> reduction starts at a lower temperature than the reduction of NiO in NiMo/Al<sub>2</sub>O<sub>3</sub> catalysts. Additionally, the reduction of Ni and Mo foil was directly compared to the reduction of the Al<sub>2</sub>O<sub>3</sub>-supported catalysts and it was observed that the reduction of the supported catalysts is more gradual than the reduction of the foils, indicating a strong interaction between the Ni/Mo and the alumina support.</p>}}, author = {{Gericke, Sabrina Maria and Rissler, Jenny and Bermeo, Marie and Wallander, Harald and Karlsson, Hanna and Kollberg, Linnéa and Scardamaglia, Mattia and Temperton, Robert and Zhu, Suyun and Sigfridsson Clauss, Kajsa G. V. and Hulteberg, Christian and Shavorskiy, Andrey and Merte, Lindsay Richard and Messing, Maria Elise and Zetterberg, Johan and Blomberg, Sara}}, issn = {{2073-4344}}, keywords = {{APXPS; bimetallic catalysts; catalysis; in situ; NiMo-alumina; reduction; X-ray-based methods; XANES}}, language = {{eng}}, number = {{7}}, publisher = {{MDPI AG}}, series = {{Catalysts}}, title = {{In Situ H<sub>2</sub> Reduction of Al<sub>2</sub>O<sub>3</sub>-Supported Ni- and Mo-Based Catalysts}}, url = {{http://dx.doi.org/10.3390/catal12070755}}, doi = {{10.3390/catal12070755}}, volume = {{12}}, year = {{2022}}, }