- Title
- Influence of Promoters (Fe, Mo, W) on the Structural and Catalytic Properties of Ni/BEA for Guaiacol Hydrodeoxygenation
- Creator
- Yan, Penghui; Tian, Xinxin; Kennedy, Eric M.; Tkachenko, Olga Petrovna; Stockenhuber, Michael
- Relation
- ACS Sustainable Chemistry and Engineering Vol. 9, Issue 46, p. 15673-15682
- Publisher Link
- http://dx.doi.org/10.1021/acssuschemeng.1c06266
- Publisher
- American Chemical Society
- Resource Type
- journal article
- Date
- 2021
- Description
- Hydrodeoxygenation (HDO) of guaiacol was investigated over BEA-supported bimetallic Ni-Fe, Ni-Mo, and Ni-W catalysts in a continuous-flow reactor. The electronic properties of Ni were significantly modified following the addition of W and Fe as analyzed by X-ray photoelectron spectroscopy (XPS) and temperature-programmed desorption (TPD), which is well in line with density functional theory (DFT) calculations, suggesting that the formation of Ni-Fe and Ni-W alloys is thermodynamically favorable while the generation of a Ni-Mo alloy is unfavored. The HDO over 9 wt % Ni/BEA catalyst was significantly improved following the incorporation of small quantities (<2.2 wt %) of Mo or Fe, while the incorporation of W decreased the HDO rate. The selectivity to hydrogenation products over the Ni-Fe/BEA catalyst was not altered compared to that of Ni/BEA during the hydrogenation of toluene, indicating that the observed increase in guaiacol conversion was engendered by the promotion of the direct hydrogenolysis of guaiacol to aromatics over Ni-Fe species. The hydrogenation and HDO rates of the Ni-Mo/BEA catalyst were both higher than those of Ni/BEA, which was attributed to the increased Ni dispersion promoted by Mo as indicated by similar nickel turnover frequency (TOFNi) values observed over Ni/BEA and Ni-Mo/BEA.
- Subject
- bio-oil; hydrodeoxygenation; Ni/BEA; promoter; DFT calculation
- Identifier
- http://hdl.handle.net/1959.13/1448433
- Identifier
- uon:43406
- Identifier
- ISSN:2168-0485
- Language
- eng
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