Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China.
Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, PR China.
Bioresour Technol. 2014 Feb;154:10-7. doi: 10.1016/j.biortech.2013.12.020. Epub 2013 Dec 14.
The depolymerization of renewable lignin for phenolic monomer, a versatile biochemical and precursor for biofuel, has attracted increasing attention. Here, an efficient base-catalyzed depolymerization process for this natural aromatic polymer is presented with cheap industrial solid alkali MgO and biomass-derived solvent tetrahydrofuran (THF). Results showed that more than 13.2% of phenolic monomers were obtained under 250°C for 15 min, because of the excellent lignin dissolution of THF and its promotion effect on the catalytic activity of MgO. Furthermore, comparison characterization on the raw material, products and residual solid using elemental analysis, FT-IR, TG-DSC, Py-GC-MS and chemo-physical absorption and desorption demonstrated that this base-catalyzed process can inhibit char formation significantly. Whereas, the fact that thermal repolymerization of oligomer on the pore and surface of catalyst resulting in the declination of the catalytic performance is responsible for the residue formation.
可再生木质素解聚为酚类单体，这是一种多功能的生化物质和生物燃料前体，引起了越来越多的关注。在此，我们提出了一种利用廉价的工业固体碱氧化镁和生物质衍生溶剂四氢呋喃（THF）高效催化木质素解聚的方法。结果表明，在 250°C 下反应 15 分钟，可得到超过 13.2%的酚类单体，这归因于 THF 对木质素的优异溶解能力以及对氧化镁催化活性的促进作用。此外，通过元素分析、FT-IR、TG-DSC、Py-GC-MS 和化学物理吸收和解吸对原料、产物和残余固体进行比较分析表明，该碱催化过程可以显著抑制焦炭的形成。然而，由于催化剂孔道和表面上的低聚物热重排导致催化性能下降，这是残炭形成的原因。
