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Energy and chemical conversion of five Australian lignocellulosic feedstocks into bio-crude through liquefaction

机译:通过液化将五种澳大利亚木质纤维素原料进行能量和化学转化为生物原油

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Thermal liquefaction of five potential feedstocks namely, banana bunch stems (BBS), pineapple tops (PT), Forage sorghum (FS), bagasse (Ba) and Arundo donax (AD) were examined from an energy perspective at a large laboratory scale. Comparison of oil yield and higher heating value (HHV) of feedstock and bio-crude at this scale enabled analysis of the energy efficiency of the liquefaction of feedstock with varying structural compositions under different reaction conditions. Arundo donax was used to investigate degradation behaviour for bio-crude production at temperatures between 250–350 °C and biomass/solvent ratios of 1/10 to 1/25 (wt/wt). Maximum bio-crude yield of 67.3% was observed for AD at 350 °C and biomass/solvent ratio of 1/15. Liquefaction with recycled solvent in the first run improved energy recovery and the heating value of the bio-crude in comparison with fresh solvent. On the basis of the energy conversion, the feedstocks ranked as follows: BBS (105%) > FS (77%) > Ba (57%) > PT (55%) > AD (40%). GCMS results showed that the chemical composition changed in distribution and relative abundance of the oxygenated compounds, varying significantly depending on the type of biomass. Analysis of energy input and output of varying conditions and feedstock showed energy requirements and the HHV varied with the feedstock.
机译:五种潜在原料的热液化,分别是香蕉束茎(BBS),菠萝皮(PT),饲草高粱(em),蔗渣(Ba)和 Arundo donax (AD从大型实验室规模的能源角度进行了研究。在此规模下比较原料和生物原油的产油量和更高的热值(HHV),可以分析在不同反应条件下具有不同结构组成的原料液化的能量效率。 Arundo donax 用于研究在250-350°C之间的温度和生物质/溶剂比为1/10至1/25(wt / wt)的生物粗产物的降解行为。在350℃和AD / 15的生物质/溶剂比下,AD的最大生物粗品产率为67.3%。与新鲜溶剂相比,在第一轮中使用回收溶剂进行液化可改善能量回收和生物原油的发热量。基于能量转换,原料排名如下:BBS(105%)> FS(77%)> Ba(57%)> PT(55%)> AD(40%)。 GCMS结果表明,含氧化合物的化学成分分布和相对丰度发生了变化,这取决于生物质的类型。分析不同条件和原料的能量输入和输出显示能量需求,HHV随原料而变化。

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