Ni-W Catalysts Supported on TiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> for Efficient Green Diesel Production: “Standard” vs “Keggin” Comparison
In order to obtain an efficient Ni-W catalyst for green diesel production, a new preparation method based on Keggin-type polyoxotungstates supported on TiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> was developed. The as-obtained catalyst (NiPW/TiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub>) was compared to a conventionally synthesized catalyst (NiW/TiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub>) during each step of the catalyst preparation. Depending on the preparation method, different Ni-W species were formed. Afterward, the catalysts were sulfided, and the Lewis and Brønsted acid concentrations were determined. Finally, all catalysts were tested in the hydroprocessing of soybean oil. The results show a direct correlation between hydroprocessing activity and Lewis/Brønsted acidity. The NiPWS/TiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> catalyst presents the highest value of Lewis acid sites (227 μmol/g). Consequently, this catalyst shows deoxygenation activity values 10 and 55% higher than those for NiWS/TiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> and NiWS/Al<sub>2</sub>O<sub>3</sub>-reference, respectively. The NiPWS/TiAl catalyst exhibits the highest selectivity to <i>C</i> <sub>18</sub> among all of the catalysts studied, producing green diesel with the highest added value.
Authors
- Acela López-Benítez (ORCID: https://orcid.org/0000-0002-1535-8115)
- Alfredo Guevara (ORCID: https://orcid.org/0000-0002-5658-9884)
- Ricardo Rivera-Guasco
Institutions
- Universidad Autónoma del Estado de Hidalgo (MX)
- Instituto Politécnico Nacional (MX)
Publication Details
- Journal
- ACS Omega
- Published
- 2025-01-27
- DOI
- https://doi.org/10.1021/acsomega.4c05634
- Citations
- 4
- Primary Topic
- Catalysis and Hydrodesulfurization Studies
- Type
- article
- Field-Weighted Citation Impact
- 2.85
Funders
- Consejo Nacional de Ciencia y Tecnología