Biomass & Bioenergy ( IF 6 ) Pub Date : 2022-05-05 , DOI: 10.1016/j.biombioe.2022.106448 Sreedhar Gundekari , Bijoy Biswas , Thallada Bhaskar , Kannan Srinivasan
This work investigated hydrodeoxygenation-hydrogenation of lignin-based methoxyphenols (obtained through hydrothermal liquefaction (HTL) of lignin) to cyclohexanol in high yields over in situ generated Ru(0)@Mg(OH)2 catalyst in aqueous medium. The active catalyst Ru(0)@Mg(OH)2 is generated in situ from hydrous ruthenium oxide (HRO)/Mg(OH)2 under reaction conditions, as confirmed by various physiochemical techniques. Continuous and controlled addition of H2 at constant temperature facilitated in improving the selectivity of cyclohexanol compared to the conventional batch mode (pre-set pressure) process. Complete conversion of methoxyphenols with 93–99% selectivity for cyclohexanol was achieved at 10 mL/min H2 flow under comparatively milder reaction conditions. The adopted procedure and the in situ catalyst reported in this work is also effective for lignin-derived phenolic concoction.
中文翻译:
原位Ru催化剂上使用受控氢气输送工具从木质素基酚类混合物制备环己醇
这项工作研究了木质素基甲氧基苯酚(通过木质素的水热液化 (HTL) 获得)在水介质中原位生成的 Ru(0)@Mg(OH) 2催化剂上以高产率加氢脱氧-加氢生成环己醇。活性催化剂 Ru(0)@Mg(OH ) 2在反应条件下由含水氧化钌 (HRO)/Mg(OH) 2原位生成,这已通过各种物理化学技术得到证实。H 2的连续和受控添加与传统的间歇模式(预设压力)工艺相比,在恒温条件下有助于提高环己醇的选择性。在相对温和的反应条件下,以 10 mL/min H 2流速实现甲氧基苯酚的完全转化,对环己醇的选择性为 93-99% 。在这项工作中报道的采用的程序和原位催化剂对木质素衍生的酚类混合物也有效。