Journal
RSC ADVANCES
Volume 4, Issue 91, Pages 49924-49929Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra10891d
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Funding
- National Key Basic Research Program of China [2013CB228104]
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Solvents play a pivotal role in many chemical reactions as well as in upgrading of pyrolysis bio-oil. Herein we report a systematic study of the effects of solvents such as water, methanol, ethanol, propanol, butanol, acetone, ethyl acetate, tetrahydrofuran and hexane on hydrogenation of a lignin-derived component of pyrolysis bio-oil, phenol, over activated carbon supported palladium catalysts. The solvents were classified into four groups so as to better understand the effect of them. For hydrogen bond donor-hydrogen bond acceptor (HBD-HBA) solvents and hydrogen bond acceptor (HBA) solvents, the conversion of phenol decreased with increasing polarity/polarizability pi*. Phenol was converted completely in hexane or water at 250 degrees C. However, in methanol or ethanol, it was converted partially. Synergistic action of multiple factors had an effect on the hydrogenation of phenol. To convert phenol better, water and hexane as solvents were excellent in upgrading of pyrolysis bio-oil.
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