Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 150, Issue -, Pages 331-342Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2017.08.024
Keywords
Upgraded bio-oil; Fe-Co/SiO2; Hydrocarbons; Hydrodeoxygenation; Supported catalyst
Categories
Funding
- U.S. Department of Energy [SA0900160]
- Department of Transportation through the North Central Center of Sun Grant Initiative [SA0700149]
- South Dakota Innovation Partner [SA1600799]
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Hydrodeoxygenation (HDO) is an effective route to upgrade bio-oil to hydrocarbon bio-oil, but the development of efficient catalysts for bio-oil HDO still remains a challenge. In this study, non-sulfided Fe-Co/SiO2 catalysts were used to upgrade bio-oil using HDO. A series of Fe-Co/SiO2 catalysts with different Fe/Co mole ratios were prepared, characterized and evaluated. The Fe and/or Co loading did not change SiO2 crystalline structure. The Fe and/or Co metals increased the amount and strength of Fe-Co/SiO2 catalyst acidity. Physicochemical properties of upgraded bio-oils produced using Fe-Co/SiO2 catalysts such as water content, total acid number, viscosity and higher heating values improved in comparison to raw bio-oil. Bimetallic Fe-Co/SiO2 catalysts resulted in better HDO performance than monometallic Fe/SiO2 or Co/SiO2 catalysts. This was due to the synergistic effect of Fe and Co occurring on the SiO2 support. Fe-Co/SiO2 catalyst having medium amount of acidity was more effective for bio-oil upgrading. The highest hydrocarbons content produced using Fe-Co(1)/SiO2 catalyst was 22.44%. The mechanism of bio-oil HDO on Fe-Co/SiO2 catalysts is proposed.
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