Shanghai Key Laboratory of Green Chemistry and Chemical Processes, College of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China.
Shanghai Key Laboratory of Green Chemistry and Chemical Processes, College of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China.
Bioresour Technol. 2016 Jul;212:302-310. doi: 10.1016/j.biortech.2016.04.029. Epub 2016 Apr 8.
Catalytic hydrocracking of kraft lignin was carried out in isopropanol system and an orthogonal array design (OAD) was employed to optimize the experimental conditions. GC-MS/FID, elemental analysis, GPC and (1)H-(13)C HSQC NMR were carried out for entire investigation of the liquid products. The results indicated that the hydrocracking process was thermally controlled and catalysts showed significant influences on the product distributions. Comparing with Pd/C, Pt/C and Ru/C, Rh/C inhibited the self-condensation of isopropanol and reduced the formation of oxygenic-chain compounds. The excellent catalytic activity for phenols conversion was obtained over Rh/C. The routes of oxygenic-chain compounds formation and phenol conversion were proposed in detail. The least oxygenic-chain compounds formation, the highest phenols conversion (93.4%), the lowest O/C ratio (0.094) and the highest HHV (37.969MJ/kg) provided the possibility of the high quality bio-oil obtained over Rh/C in isopropanol medium.
采用异丙醇体系对 kraft 木质素进行催化加氢裂化，利用正交数组设计（OAD）优化实验条件。采用 GC-MS/FID、元素分析、GPC 和（1）H-（13）C HSQC NMR 对整个液体产物进行了全面研究。结果表明，加氢裂化过程受温度控制，催化剂对产物分布有显著影响。与 Pd/C、Pt/C 和 Ru/C 相比，Rh/C 抑制了异丙醇的自缩合，减少了含氧链化合物的生成。Rh/C 对酚类化合物的转化具有优异的催化活性。详细提出了含氧链化合物形成和酚类化合物转化的途径。Rh/C 获得了最低的含氧链化合物生成、最高的酚类转化率（93.4%）、最低的 O/C 比（0.094）和最高的高热值（37.969MJ/kg），为在异丙醇介质中获得高质量生物油提供了可能。
