School of Environmental Science and Safe Engineering, Tianjin University of Technology, Tianjin 300384, PR China.
Department of Energy Technology, Aalborg University, Aalborg 9220, Denmark.
Sci Total Environ. 2018 Jul 15;630:560-569. doi: 10.1016/j.scitotenv.2018.02.194. Epub 2018 Feb 25.
The present paper examines the conversion of barley straw to bio-crude oil (BO) via hydrothermal liquefaction. Response surface methodology based on central composite design was utilized to optimize the conditions of four independent variables including reaction temperature (factor X, 260-340°C), reaction time (factor X, 5-25min), catalyst dosage (factor X, 2-18%) and biomass/water ratio (factor X, 9-21%) for BO yield. It was found that reaction temperature, catalyst dosage and biomass/water ratio had more remarkable influence than reaction time on BO yield by analysis of variance. The predicted BO yield by the second order polynomial model was in good agreement with experimental results. A maximum BO yield of 38.72wt% was obtained at 304.8°C, 15.5min, 11.7% potassium carbonate as catalyst and 18% biomass (based on water). GC/MS analysis revealed that the major BO components were phenols and their derivatives, acids, aromatic hydrocarbon, ketones, N-contained compounds and alcohols, which makes it a promising material in the applications of either bio-fuel or as a phenol substitute in bio-phenolic resins.
本研究探讨了利用水热液化技术将大麦秸秆转化为生物原油（BO）。采用基于中心复合设计的响应面法，对四个独立变量（反应温度（因子 X，260-340°C）、反应时间（因子 X，5-25min）、催化剂用量（因子 X，2-18%）和生物质/水比（因子 X，9-21%））的条件进行优化，以获得 BO 的产率。方差分析结果表明，反应温度、催化剂用量和生物质/水比对 BO 产率的影响比反应时间更为显著。由二次多项式模型预测的 BO 产率与实验结果吻合较好。在 304.8°C、15.5min、11.7%碳酸钾作为催化剂和 18%生物质（基于水）的条件下，获得了 38.72wt%的最大 BO 产率。GC/MS 分析表明，BO 的主要成分是酚类及其衍生物、酸、芳烃、酮、含氮化合物和醇，这使其成为生物燃料或生物酚醛树脂中酚类替代品的有前途的材料。
