摘要
以农业废物稻草为研究对象,利用非等温技术,考察了农业废物在亚临界水(温度350℃,压力约20MPa)及超临界水(温度380℃,压力约30MPa)中的液化行为,并对反应获得的固体残渣和生物油进行了分析。实验结果表明,固体残渣的结构遭到较严重的破坏,质地变得松散,有利于进行生物发酵。实验获得的生物油成分主要为酮类和酚类的衍生物,其能量密度比原料提高将近一倍,但是黏度较大,酸性较强。在超临界状态下,固体残渣得率较低,液化效率高,获得的生物油的组分相对简单,酸性较弱,故稻草在超临界水中的液化优于其在亚临界水中的液化。
Agricultural refuse （straw） liquefaction in suberitieal water （T = 350℃ ,P = 20MPa） and supereritieal water （ T = 380℃ , P = 30MPa） with a non-isothermal technique was studied, and the analysis of residue and bio-oil was carried out. The structure of solid residue has been destroyed and the texture got looser, which can be fermented more easily. The bio-oil obtained in liquefaction has dowbled the energy density of straw. But the viscidity and acidity of bio-oil was high. Ketone and phenol derivates are the main components. The yield of solid residue is lower in supereritieal water than in suberitieal water and the component of the bio-oil obtained in supereritieal water is simpler, moreover, the acidity is weaker. The liquefaction in supereritieal water is superior to that in suberitieal water.
出处
《能源工程》
2006年第2期34-38,共5页
Energy Engineering
基金
国家863高技术资助项目(2004AA649370)
关键词
稻草
热化学液化
亚临界水
超临界水
生物油
straw
thermochemical liquefaction
subcritical water
supercritical water
bio-oil
