High-quality bio-oil from one-pot catalytic hydrocracking of kraft lignin over supported noble metal catalysts in isopropanol system.
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.
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.
Jing
J
Yang
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.
Liang
L
Zhao
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.
Shaotong
S
Liu
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. Electronic address: yywang@chem.ecnu.edu.cn.
Yuanyuan
Y
Wang
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.
Liyi
L
Dai
D019840:2-Propanol / Q000737:chemistry*; D056804:Biofuels; D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D008401:Gas Chromatography-Mass Spectrometry; D006358:Hot Temperature; D008031:Lignin / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D010165:Palladium / Q000737:chemistry; D010636:Phenols / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry
D056804:Biofuels; D010636:Phenols; D010165:Palladium; D002244:Carbon; D012428:Ruthenium; C076151:Kraft lignin; D008031:Lignin; D019840:2-Propanol
Hydrocracking; Isopropanol; Kraft lignin; Nobel metal catalysts; Orthogonal array design