Yale University, Center for Green Chemistry and Green Engineering, 225 Prospect St, New Haven, CT 06511, United States.
Yale University, Center for Green Chemistry and Green Engineering, 225 Prospect St, New Haven, CT 06511, United States; Technical University of Denmark, Department of Chemistry, Centre for Catalysis and Sustainable Chemistry, DK-2800 Kgs. Lyngby, Denmark.
Bioresour Technol. 2014 Jun;161:78-83. doi: 10.1016/j.biortech.2014.02.092. Epub 2014 Mar 12.
An isolated, solvent-extracted lignin from candlenut (Aleurites moluccana) biomass was subjected to catalytic depolymerization in the presence of supercritical methanol, using a range of porous metal oxides derived from hydrotalcite-like precursors. The most effective catalysts in terms of lignin conversion to methanol-soluble products, without char formation, were based on copper in combination with other dopants based on relatively earth-abundant metals. Nearly complete conversion of lignin to bio-oil composed of monomers and low-mass oligomers with high aromatic content was obtained in 6h at 310°C using a catalyst based on a Cu- and La-doped hydrotalcite-like precursor. Product mixtures were characterized by NMR spectroscopy, gel permeation chromatography, and GC-MS.
从麻疯树（Aleurites moluccana）生物质中提取的一种分离的、溶剂萃取的木质素，在超临界甲醇存在下，使用一系列源自水滑石前体的多孔金属氧化物进行催化解聚。在不形成焦炭的情况下，以甲醇可溶产物计，木质素转化率最高的催化剂是基于铜与其他基于相对丰富的地球金属的掺杂剂的组合。在 310°C 下使用基于 Cu 和 La 掺杂水滑石前体的催化剂，在 6 小时内几乎可将木质素完全转化为含有高芳烃含量的单体和低分子量低聚物的生物油。通过 NMR 光谱、凝胶渗透色谱和 GC-MS 对产物混合物进行了表征。
