浒苔水热液化反应条件对实验结果的影响

The Influence of Reaction Conditions on Experimental Results in the Hydrothermal Liquefaction Experiment of Enteromorpha

以溶剂为50 mL的反应釜为容器,将浒苔与溶剂在高温高压条件下进行水热液化反应,研究各反应条件如反应时间、反应温度、液料比和溶剂中乙醇体积分数等对水热液化产物分布与生物油产物成分的影响。结果表明,反应时间45 min、反应温度300℃、液料比40∶4.0和溶剂中乙醇体积分数50%是较适合浒苔水热液化的反应条件,所得生物油产率为45%。另外,通过对生物油成分的GC-MS分析,溶剂中乙醇的添加使生物油产物中的酰胺类化合物发生醇解反应,提高了酯类化合物含量,从而使生物油的品质得到了一定程度的改善。

A reactor with a volume of 50 mL was used as a container to carry out hydrothermal liquefaction of enteromorpha and solvent under high temperature and high pressure conditions. The purpose of this experiment was to investigate the effects of various reaction conditions on the distribution of hydrothermal liquefaction products and the composition of bio-oil products,such as reaction time, reaction temperature, liquid-to-liquid ratio and ethanol ratio in solvent. The experimental results show that the reaction time is 45 minutes,the reaction temperature is 300 ℃,the liquid to material ratio is 40∶4.0,and the proportion of ethanol in the solvent is 50%,which is the most suitable reaction condition for the hydrothermal liquefaction of enteromorpha,and the yield of the obtained bio-oil is 45%.In addition,by GC-MS analysis of bio-oil components,the addition of ethanol in the solvent caused the alcoholysis reaction of the amide compound in the bio-oil product which increased the content of the ester compound and improve the quality of bio-oil.