Catalytic Hydrodeoxygenation of Solar Energy Produced Bio-Oil in Supercritical Ethanol with Mo2C/CNF Catalysts: Effect of Mo Concentration

Transition metal carbides have emerged as an attractive alternative to conventional catalysts in hydrodeoxygenation (HDO) reactions due to surface reactivity, catalytic activity, and thermodynamic stability similar to those of noble metals. In this study, the impact of varying Mo concentration in ca...

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Bibliographic Details
Published in:Catalysts 2023-12, Vol.13 (12), p.1500
Main Authors: Ayala-Cortés, Alejandro, Torres, Daniel, Frecha, Esther, Arcelus-Arrillaga, Pedro, Villafán-Vidales, Heidi Isabel, Longoria, Adriana, Pinilla, José Luis, Suelves, Isabel
Format: Article
Language:English
Subjects:
Bagasse
Biomass
Carbon fibers
Catalysts
Catalytic activity
Chemical properties
Deoxygenation
Efficiency
Ethanol
Gasification
Graphite
Hydrocarbons
Hydrogen
Liquefaction
Metal carbides
Molybdenum
Molybdenum carbide
Nanoparticles
Nickel
Noble metals
Solar energy
Surface stability
Transition metals
Viscosity
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Summary:Transition metal carbides have emerged as an attractive alternative to conventional catalysts in hydrodeoxygenation (HDO) reactions due to surface reactivity, catalytic activity, and thermodynamic stability similar to those of noble metals. In this study, the impact of varying Mo concentration in carbon nanofiber-supported catalysts for the supercritical ethanol-assisted HDO of bio-oils in an autoclave batch reactor is discussed. Raw bio-oils derived from agave bagasse and corncob through solar hydrothermal liquefaction were treated at 350 °C. Our findings indicate that the presence of Mo has a strong impact on both product yield and chemical properties. Thus, a Mo concentration of 10 wt.% is enough to obtain high deoxygenation values (69–72%), resulting in a yield of upgraded bio-oil ranging between 49.9 and 60.4%, depending on the feedstock used, with an energy content of around 35 MJ/kg. A further increase in the Mo loadings (20 and 30 wt.%) reduced the loss of carbon due to gasification and improved the bio-oil yields up to 62.6 and 67.4%, without compromising the product quality.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal13121500