水稻秸秆在亚/超临界乙醇中的液化实验研究

在间歇式高压反应釜中采用乙醇为溶剂在亚/超临界状态下对水稻秸秆进行液化实验研究，考察了反应温度、稻秆/乙醇比及停留时间对稻秆液化的影响，确定了反应温度325 ℃、稻秆与乙醇比为1.0/10.0（g/mL）、反应时间60 min为最佳液化条件。在此条件下，稻秆转化率为78.32%，液化油收率达55.03%；通过GC-MS对液化油进行分析，结果表明，生物油的主要成分是酚类和酯类，占总体的50%左右。液化油的热值为28.95 MJ/kg，运动黏度为5.63 mm²/s，水分含量为2.2%。

Liquefaction of rice stalk in sub- and supercritical ethanol

Rice stalk (RS) was liquefied in ethanol under sub-and supercritical conditions in a batch autoclave; the influences of reaction temperature, RS/ethanol ratio and residence time on the liquefaction behavior were investigated. Under the optimized conditions, i.e. 325 ℃, a RS/ethanol ratio of 1/10 (g/mL), and a residence time of 60 min, the RS conversion and oil yield reach 78.32% and 55.03%, respectively. The GC/MS analysis results illustrate that the dominant components of the bio-oil are phenols and esters, which account for about 50% of the bio-oil product. The bio-oil product obtained exhibits a high heat value (HHV) of 28.95 MJ/kg, a kinematic viscosity of 5.63 mm²/s, and a water content of 2.2%.