In-situ hydrogenation of bio-oil/bio-oil phenolic compounds with secondary alcohols over a synthesized mesoporous Ni/CeO2 catalyst
Journal Article
·
· Chemical Engineering Journal
- Univ. of Seoul (Korea, Republic of)
- Education Univ. of Hong Kong (Hong Kong)
- Kongju National Univ., Cheonan (Korea, Republic of)
- Sungkyunkwan Univ., Suwon (Republic of Korea)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
Mesoporous ceria, which was synthesized under supercritical conditions, was found to be an effective support material of Ni catalyst for the in-situ hydrogenation of m-cresol (a representative compound of bio-oil) using secondary alcohols of 2-propanol (2-PrOH) and 2-butanol (2-BuOH) as a hydrogen source (H-donor) to produce 3-methylcyclohexanol, 3-methylcyclohexene, and methylcyclohexane under a H2 gas-free atmosphere. The activities of different metal catalysts (Ni, Cu, and Co) for the in-situ hydrogenation of m-cresol were examined using 2-PrOH as a H-donor. Total and effective conversion of m-cresol achieved only over Ni/CeO2 because of its fair catalytic properties, as determined by N2 adsorption-desorption, hydrogen temperature-programmed reduction, ammonia temperature-programmed desorption, X-ray diffraction, and transmission electron microscopy. The dependence of Ni/CeO2 performance on the reaction time (4-6 h) and Ni loading (3-9 wt%) was examined from the in-situ hydrogenation of m-cresol with 2-PrOH. The deactivation test of Ni/CeO2 was performed by reusing the spent catalyst, which was then regenerated through successive oxidation and reduction, several times in the m-cresol transformation employing 2-PrOH as a H-donor. In addition to m-cresol, other phenolic model compounds of bio-oil, such as anisole, phenol, and guaiacol, were also treated by in-situ hydrogenation with 2-PrOH over Ni/CeO2. Although this catalyst was effective for phenol and guaiacol transformation, it was relatively ineffective for anisole conversion. The in-situ hydrogenation of crude bio-oil with 2-PrOH and 2-BuOH was accomplished over the Ni/CeO2 catalyst, resulting in a refined bio-oil with a 37.5-38.9% lower oxygen content and a high heating value (HHV) of up to 25 MJ/kg.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1571386
- Report Number(s):
- NREL/JA-2700-75203
- Journal Information:
- Chemical Engineering Journal, Journal Name: Chemical Engineering Journal Vol. 382; ISSN 1385-8947
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Supercritical Solvent Composition Influence on Bio-oil Model Compound Deoxygenation [Влияние состава сверхкритического растворителя на деоксигенирование модельных соединений био-нефти]
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journal | November 2019 |
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