Zhoukou Normal University, School of Chemistry and Chemical Engineering, Wenchang Avenue, Zhoukou, Henan, China.
Shaanxi Key Laboratory of Energy Chemical Process Intensification, Xi'an Jiaotong University, School of Chemical Engineering and Technology, No.28, West Xianning Road, Xi'an, Shaanxi, China.
Bioresour Technol. 2021 Aug;333:125185. doi: 10.1016/j.biortech.2021.125185. Epub 2021 Apr 16.
Hydrothermal liquefaction of corn straw with different catalytic systems and temperatures were investigated in this study. Results showed dual catalytic system can effectively promote the degradation of corn straw at low temperature. With increase of temperature, aqueous phase increased and straw residue decreased for all catalytic systems. The heavy bio-oil yield increased with the increasing of temperature for single catalytic system, while the trend was opposite for dual catalytic system. In single catalytic system, ZnFeO was more suitable for preparation of heavy bio-oil, and the maximum yield reached 34.02 wt% at 180 °C. The proportion of monophenyl compounds in heavy bio-oil for dual catalytic system reached the maximum of 84% at 220 °C with ZnFeO. At 180 °C, the contents of Benzofuran,2,3-dihydro and 2-Methoxy-4-vinylphenol reached the maximum of 31.42% and 17.64% in CoFeO catalyst system, and the maximum yield of Vanillin was 10.82% with ZnFeO.
本研究考察了不同催化体系和温度下水热液化玉米秸秆的情况。结果表明，双催化体系可以在低温下有效促进玉米秸秆的降解。随着温度的升高，所有催化体系的水相增加，秸秆残渣减少。对于单催化体系，重质生物油产率随温度升高而增加，而对于双催化体系则相反。在单催化体系中，ZnFeO 更适合制备重质生物油，在 180°C 时最大产率达到 34.02wt%。双催化体系中 ZnFeO 的重质生物油中单苯基化合物的比例在 220°C 时达到最大，为 84%。在 180°C 时，CoFeO 催化剂体系中苯并呋喃、2,3-二氢和 2-甲氧基-4-乙烯基苯酚的含量达到最大值，分别为 31.42%和 17.64%，ZnFeO 的香草醛最大产率为 10.82%。
