【作者】 王艳芹； 夏启能； 陈宗家； 王海丰； Sihai Yang；

【Author】 Y.Q.Wang;Q.N.Xia;Z.J.Chen;H.F.Wang;S.H.Yang;East China University of Science and Technology;University of Manchester;

【机构】 华东理工大学工业催化研究所； University of Manchester；

【摘要】 以Pt/NbOPO₄作为多功能的催化剂第一次实现了原生木质生物质到烷烃的直接转化,液相收率高达28%。不仅实现了木质生物质中纤维素,半纤维素到己烷,戊烷的转化,且可把木质素转化为取代环己烷。反应机理结合原位非弹性中子散射和DFT计算发现贵金属Pt活化H₂的能力,NbOx断C-O键的能力和磷酸铌的酸性共同作用使得原生木质生物质在不经过化学预处理的条件下可高效脱氧加氢制得烷烃,为原生生物质转化为烷烃开辟了一条新路径。更多还原

【Abstract】 Being the only sustainable source of organic carbon, biomass is playing an ever-increasingly important role in our energy landscape. The conversion of renewable lignocellulosic biomass into liquid fuels is particularly attractive but extremely challenging due to the inertness and complexity of lignocellulose. Here we describe the direct hydrodeoxygenation of raw woods into liquid alkanes with mass yields up to 28.1 wt% over a multifunctional Pt/NbOPO₄ catalyst in cyclohexane. The superior performance of this catalyst allows simultaneous conversion of cellulose, hemicellulose and, more significantly, lignin fractions in the wood sawdust into hexane, pentane and alkylcyclohexanes, respectively. The molecular mechanism of this conversion was investigated by a combination of control experiments and in situ inelastic neutron spectroscopy, coupled with theoretical modeling. These comprehensive experiments revealed that the synergistic effect between Pt, NbOx species and acidic sites promoted this highly efficient hydrodeoxygenation of bulk lignocellulose. This opens a general and energy-efficient route for converting raw lignocellulose into valuable alkanes.更多还原