随着煤、石油、天然气等不可再生资源的逐渐消耗及环境问题的日益恶化,通过可再生生物质资源生产液体燃料和有机化学品的研究日益受到青睐.本研究以硫酸为催化剂,乙醇为溶剂,充分利用内蒙古丰富的生物质资源沙柳,对其进行醇解液化.考察溶剂浓度、反应温度、沙柳用量、催化剂用量等因素对液化率的影响,通过正交实验找出较优液化条件.当溶剂为无水乙醇、液料比(mL:g)为60:1、反应温度为170℃、硫酸浓度为0.06 mol/L、反应时间为2 h 时,沙柳的液化效果最好,液化率达90.94%.
With the gradual exhaustion of coal, oil, natural gas and other non-renewable resources and the worsening environment, the production of liquid fuels and organic chemicals through renewable biomass resources becomes more and more an important issue. In this study, with the ethanol as solvent and the dilute sulfuric acid as catalyst, the Salix psammophila, an abundant biomass resource in Inner Mongolia is used as the raw material of the alcoholysis liquid, and the effects of the solvent concentration, the reaction temperature, the dosage of Salix psammophila, and the dosage of catalyst on the liquefaction rate are investigated. Through the orthogonal experiment, the best liquefaction conditions are found: The solvent is ethanol, the ratio of liquid and solid is 60:1, the reaction temperature is 170℃, the sulfuric acid concentration is 0.06 mol/L, and the reaction time is 2 h. Under these conditions, the effect of liquefaction of Salix psammophila is the best and the liquefaction rate reaches 90.94%.
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