Institute of Chemical Industry of Forest Products, CAF, Jiangsu Key Laboratory for Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China; Nanjing Forestry University, Nanjing 210037, China.
Institute of Chemical Industry of Forest Products, CAF, Jiangsu Key Laboratory for Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China.
Int J Biol Macromol. 2020 Aug 1;156:94-102. doi: 10.1016/j.ijbiomac.2020.04.072. Epub 2020 Apr 11.
VS spheres and VS sheets with doped compositions (Mo, Ag and graphite) were successfully prepared by one-step hydrothermal method and characterized by different techniques including X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N adsorption isotherms. Catalysts were applied for the depolymerization of alkali lignin. VS spheres exhibited lower yield of degraded lignin and bio-oil than those with VS sheets and VS flowers heated to 250 °C and held for 1.5 h with 2.0 MPa H. The catalytic depolymerization performance was markedly affected by the dopant in the VS sheets, with the highest degraded lignin yield of 81.22%, achieved over 5 wt% Ag-VS at 290 °C under 2.0 MPa H for 1.5 h, yielding 61.23% bio-oil. The VS-based catalysts show excellent selectivity in the interruption of the lignin structure and target production of bio-oil. The bio-oil showed that the relevant contents of a phenolic-type compound changes significantly according to the dopant in the VS catalyst.
通过一步水热法成功制备了掺杂（Mo、Ag 和石墨）组成的 VS 球体和 VS 片，并通过 X 射线粉末衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和 N 吸附等温线等不同技术进行了表征。催化剂被应用于碱木质素的解聚。与加热到 250°C 并在 2.0 MPa H 下保持 1.5 小时的 VS 花和 VS 片相比，VS 球体表现出较低的降解木质素和生物油产率。掺杂剂对 VS 片的催化解聚性能有显著影响，在 2.9 MPa H 和 2.0 MPa H 下，5wt%Ag-VS 在 290°C 下反应 1.5 小时，木质素的降解率最高为 81.22%，生物油产率为 61.23%。VS 基催化剂在打断木质素结构和目标生产生物油方面表现出优异的选择性。生物油表明，根据 VS 催化剂中的掺杂剂，酚类化合物的相关含量发生了显著变化。
