Upgrading of bio-tar derived from fast pyrolysis of sawdust was performed over activated charcoal supported nickel-based catalysts (Ni/AC, NiMo/AC, MgNiMo/AC) under supercritical ethanol conditions. The catalytic activities of the catalysts was compared with those of representative bio-oil upgrading catalysts (Ru/AC, HZSM-5). The MgNiMo/AC catalyst exhibited the highest catalytic performance among the catalysts with a decrease of oxygen content in bio-tar from 31.3 wt% up to 10.8 wt% and the yield of liquid product (75 wt%). The effects of reaction temperature (275–350 °C), reaction time (0–120 min) and bio-tar to ethanol ratio (1/9–4/6) were also studied over the MgNiMo/AC catalyst. In addition, reaction of vanillin which is one of major compounds present in bio-tar was carried out under the same bio-tar upgrading conditions in order to understand the production mechanism of phenolic chemicals.

在活性炭负载的镍基催化剂（Ni / AC，NiMo / AC，MgNiMo / AC）上，在超临界乙醇条件下，对源自木屑快速热解的生物焦油进行了升级。将催化剂的催化活性与代表性的生物油提质催化剂（Ru / AC，HZSM-5）进行了比较。在催化剂中，MgNiMo / AC催化剂表现出最高的催化性能，其中生物焦油中的氧含量从31.3 wt％降低到10.8 wt％，液体产品的收率（75 wt％）降低。在MgNiMo / AC催化剂上，还研究了反应温度（275–350°C），反应时间（0–120分钟）和生物焦油与乙醇之比（1 / 9–4 / 6）的影响。此外，