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Huang F.,Key Laboratory for Biomass Clean Energy of Anhui Province | Li W.,Key Laboratory for Biomass Clean Energy of Anhui Province | Shang L.,Key Laboratory for Biomass Clean Energy of Anhui Province | Zhu X.,Key Laboratory for Biomass Clean Energy of Anhui Province
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2013

Four homogeneous catalysts RuCl2(PPh3)3, RhCl(PPh3)3, PdCl2(PPh3)2 and NiCl2(PPh3)2 were prepared for upgrading of bio-oil to improve its quality. From the results by GC-MS, the high reactive aldehydes, phenols and acids in bio-oil were converted substantially at mild conditions (under 100°C). The conversions of aldehydes to corresponding alcohols and phenols with C=C side chain to phenols with saturated side chain by using catalyst RuCl2(PPh3)3 were over 90% and 50%, respectively. Moreover, the conversion of phenols with C=C side chain was over 85% by using RhCl(PPh3)3. Besides the ability to promote adehydes and C=C hydrogenation, catalysts PdCl2(PPh3)2 and NiCl2(PPh3)2 still shown performance in acids esterification. Meanwhile, due to the low temperature and catalysts high efficiency, char and coke were not found in all experiments. The results show the great potential of upgrading bio-oil using homogenous catalytic hydrogenation technique. Source

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