396 / 2018-08-01 14:25:08

Catalytic Conversion of Biomass to Value-added Chemicals via Selective Hydrodeoxygenation

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Biomass is a globally available, renewable, and natural carbon resource. The catalytic conversion of biomass and derivatives to chemicals has been the subject of intense research efforts in the Green Chemistry. As the over-oxygenated functionalized biomass feedstocks, however, a new challenge is the development of synthetic methods for selective removal or retention of specific oxygen groups. In this study, a complex catalytic system of triflate metal salts + Pd/C was used to achieve the selective hydrodeoxygenation of biomass platforms. In particular, (a) by changing the hydrogen activation mode to regulate the reaction path, the hydrogenolysis cleavage of different C-O bonds can be achieved; (b) by the difference in the catalytic activity of the catalytic system on the reaction substrate group, the selective hydrogenolysis of different oxygen-containing groups can be achieved; (c) by screening the triflate metal salt (e.g. W(OTf)6, Hf(OTf)4, Al(OTf)3, Sc(OTf)3, Ce(OTf)3, etc.) to regulate the Lewis acidity, the regioselective hydrogenolysis of the oxygen-containing group is achieved. To conclude, a selective hydrodeoxygenation of biomass-based platform compounds has been developed to produce the high value-added functional chemicals such as fatty alcohols, fatty acids, diols, and dicarboxylic acids.