Deoxygenation of non-edible fatty acid for green diesel production: Effect of metal loading amount over Ni/MgO–Al2O3 on the catalytic performance and reaction pathway

• Published in: Fuel (Guildford) Vol. 311; p. 122488
• Main Authors: Jeon, Kyung-Won, Park, Ho-Ryong, Lee, Yeol-Lim, Kim, Jee-Eun, Jang, Won-Jun, Shim, Jae-Oh, Roh, Hyun-Seog
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.03.2022; Elsevier BV
• Subjects: Acidity; Aluminum oxide; Calorific value; Catalysts; Deoxygenation; Diesel; Diesel fuels; Fatty acids; Green diesel production; Magnesium oxide; Number of Ni active sites; Reaction pathway; Reducibility; Green diesel production; Number of Ni active sites; Reducibility; Deoxygenation; Reaction pathway
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2021.122488

[Display omitted] •Green diesel was produced by deoxygenation of non-edible fatty acids.•Metal loading amount over Ni/MG70 was optimized for deoxygenation.•The number of Ni active sites, reducibility, and acidity affects the performance.•Hydrodeoxygenation was main reaction pathway in this reaction. Ni/MgO-Al2O3 (Ni/MG70) catalysts were developed for the deoxygenation reaction to produce green diesel from non-edible fatty acids. As the Ni loading amount was increased from 5% to 30%, the characteristics of the catalysts, such as Brunauer–Emmett–Teller (BET) surface area, Ni dispersion, reducibility, number of Ni active sites, and acidity, varied. Among the prepared catalysts, the 20% Ni/MG70 catalyst showed excellent deoxygenation performance owing to its highest number of Ni active sites, easier reducibility, and appropriate acidity. Furthermore, it was confirmed that deoxygenation in this study was carried out via the hydrodeoxygenation reaction pathway to remove oxygen species as H2O. In addition, the basic fuel properties, calorific value and viscosity, were analyzed for produced green diesel.