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采用稀酸改性和发酵改性对新鲜玉米秸秆进行处理,并利用间歇式高温高压反应釜进行水热液化制备生物油。分析稀酸改性处理和发酵改性处理对玉米秸秆微观形貌和官能团及生物油液化产率和化学成分的影响。结果表明:稀酸改性处理和发酵改性处理均能破坏玉米秸秆木质纤维素的结构,但对官能团的种类影响较小。改性处理有利于生物油产率和生物质转化率的提高,其中发酵改性处理的效果更显著,生物油产率和生物质转化率分别提高到39.95%和86.61%,生物油化学成分相对含量大于4%的化合物有6种,相对含量总和高达54.84%。
The fresh corn stalks were treated with dilute acid modification and fermentation modification, and bio-oil was prepared by hydrothermal liquefaction in a batch-type high temperature and high pressure reactor. The effects of dilute acid modification and fermentation modification on the morphology and functional groups of corn stalks and the liquefaction yield and chemical composition of corn stalks were analyzed. The results showed that both dilute acid modification and fermentation modification could destroy the structure of corn stalk lignocellulose, but had little effect on the types of functional groups. The modification treatment is beneficial to the increase of bio-oil yield and biomass conversion rate, of which the effect of fermentation modification is more significant, the bio-oil yield and biomass conversion rate are raised to 39.95% and 86.61% respectively, and the chemical composition of bio-oil is relatively There are 6 kinds of compounds with more than 4%, the total content is up to 54.84%.