| 초록 |
Recently, lignocellulosic biomass is a highly potential renewable source due to its low cost and availability. However, bio-oil from pyrolysis of biomass has several problems including high oxygen content, high acidity and low heating value. Thus, bio-oil requires the upgrading process by elimination of the oxygen, acid and unstable components contained in the bio-oil. In this study, the upgrading process for bio-oil was conducted in supercritical ethanol over the Mg-Ni-Mo/activated charcoal catalyst without using external hydrogen donor. The principal goal is to obtain high quality of bio-oil with lower oxygen content, acid value and higher heating value. The effects of the reaction temperature, time and initial nitrogen pressure on the product yields and the quality of the upgraded oils. Esterification, hydrogenation, alkylation of phenolic compounds, decarbonylation, decarboxylation reaction occurred simultaneously during the catalytic upgrading process. |
