Method for preparing cyclic alcohol through catalytic conversion of lignin depolymerized bio-oil
A technology for catalytic conversion and bio-oil, applied in the field of lignin conversion, can solve the problems of low selectivity of target products, difficult product separation, uncontrollable conversion process, etc., and achieves good application prospects, strong selectivity, and high product yield. Effect
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Embodiment 1
[0039] 0.1 g of lignin pyrolysis bio-oil, 0.01 g of CuZnAlO with Cu content of 20% x The catalyst and 1.2 g methanol were placed in the reactor, purged with argon, pressurized and sealed; then, the reactor was heated to 300 °C for 2 hours, and the reaction was completed, and the reactor was placed in ice water for rapid cooling to stop The reaction was followed by filtration, the liquid phase product was collected, and its composition was determined by GC-MS and GC-FID. The results were: the monomer yield was 20.31C%, the cycloalcohol selectivity was 80.05%, and the cycloalkane selectivity was 0.78%.
Embodiment 2
[0041] 0.1g lignin hydrogenolysis bio-oil, 0.03g Cu content of 10% CuZnAlO x The catalyst and 2.4g of ethanol were placed in the reactor, purged with argon, pressurized and sealed; after that, the reactor was heated to 200°C for 2 hours, and after the reaction was completed, the reactor was placed in ice water for rapid cooling to stop The reaction was followed by filtration, the liquid phase product was collected, and its composition was determined by GC-MS and GC-FID. The results were as follows: the monomer yield was 23.76C%, the cycloalcohol selectivity was 77.91%, and the cycloalkane selectivity was 0.48%.
Embodiment 3
[0043] Oxidative degradation of 0.1g lignin bio-oil, 0.05g Cu content of 30% CuZnAlO x The catalyst and 2.4 g of propanol were placed in the reactor, purged with argon, pressurized and sealed; after that, the reactor was heated to 300 °C for 4 h and kept for reaction. After the reaction was completed, the reactor was placed in ice water for rapid cooling. The reaction was stopped and the liquid phase product was filtered, collected and its composition determined by GC-MS and GC-FID. The results were: the monomer yield was 38.45C%, the cycloalcohol selectivity was 82.21%, and the cycloalkane selectivity was 1.01%.
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