School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast BT95AG, Northern Ireland, UK.
Bioresour Technol. 2011 Oct;102(19):9076-82. doi: 10.1016/j.biortech.2011.07.006. Epub 2011 Jul 18.
The visibility of using municipal bio-waste, wood shavings, as a potential feedstock for ethanol production was investigated. Dilute acid hydrolysis of wood shavings with H₃PO₄ was undertaken in autoclave parr reactor. A combined severity factor (CSF) was used to integrate the effects of hydrolysis times, temperature and acid concentration into a single variable. Xylose concentration reached a maximum value of 17 g/100 g dry mass corresponding to a yield of 100% at the best identified conditions of 2.5 wt.% H₃PO₄, 175 °C and 10 min reaction time corresponding to a CSF of 1.9. However, for glucose, an average yield of 30% was obtained at 5 wt.% H₃PO₄, 200 °C and 10 min. Xylose production increased with increasing temperature and acid concentration, but its transformation to the degradation product furfural was also catalysed by those factors. The maximum furfural formed was 3 g/100 g dry mass, corresponding to the 24% yield.
研究了将城市生物废料木屑用作乙醇生产潜在原料的可行性。采用 H₃PO₄在高压釜 Parr 反应器中对木屑进行稀酸水解。采用综合严重度因子（CSF）将水解时间、温度和酸浓度的影响综合为一个单一变量。在最佳反应条件下，即 2.5wt.% H₃PO₄、175°C 和 10min 反应时间，木糖浓度达到 17g/100g 干物质的最大值，对应于 100%的收率，对应的 CSF 为 1.9。然而，对于葡萄糖，在 5wt.% H₃PO₄、200°C 和 10min 的条件下，平均收率为 30%。木糖的产量随着温度和酸浓度的增加而增加，但这些因素也促进了其向降解产物糠醛的转化。形成的糠醛最大值为 3g/100g 干物质，对应于 24%的收率。
