Reductive catalytic fractionation (RCF) has emerged as a novel biorefinery strategy for the efficient fractionation and utilization of lignocellulosic biomass. Herein, hydrogenolysis of lignin in birch sawdust in the presence of noble metal based catalysts (Ru/C, Pd/C, Pt/C) were investigated. The total yield of monophenolic compounds was 41.4 wt% (TOF, 5.28 h⁻¹) and the selectivity towards 4-propyl guaiacol and 4-propyl syringol reached 82.8 % with 5 % Ru/C under optimized conditions. The cleavage of β-O-4 and α-O-4 (cyclic) aryl ether linkages in the trimers and tetramers resulted in the formation of lignin-derived dimers, which were quantified by the derivatization method. The high surface area of catalysts with the highly dispersed and small sized metallic particles contributed to the degradation of higher molecular weight oligomers. The catalysts could promote the cleavage of COC ether bonds and hydrogenation of unsaturated side-chain CC bonds to obtain propyl-substituted monophenolic compounds with high selectivity.

还原催化分馏（RCF）作为一种新型的生物精制策略已经出现，可以有效地分馏和利用木质纤维素生物质。在此，研究了在贵金属基催化剂（Ru / C，Pd / C，Pt / C）存在下，桦木锯末中木质素的氢解反应。单酚类化合物的总收率为41.4 wt％（TOF，5.28 h ^-1），在优化的条件下，以5％的Ru / C对4-丙基愈创木酚和4-丙基丁香酚的选择性达到82.8％。三聚体和四聚体中β-O-4和α-O-4（环状）芳基醚键的裂解导致木质素衍生的二聚体的形成，通过衍生化方法对其进行定量。具有高度分散和小尺寸金属颗粒的催化剂的高表面积有助于较高分子量的低聚物的降解。该催化剂可以促进C O C醚键的裂解和不饱和侧链C C键的氢化，从而获得具有高选择性的丙基取代的单酚类化合物。