芒草硫酸水解糖化的研究

On conditions of sugar manufacturing of Miscanthus sinensis by acid hydrolysis

芒草是高产的纤维素类植物,作为能源植物受到国内外的广泛关注。利用纤维素类生物质材料生产燃料过程中,秸秆的水解糖化是关键步骤。研究了浓硫酸和稀硫酸的浓度、时间、温度、酸固比对芒草糖化处理的影响,从中筛选出了浓硫酸和稀硫酸处理的最佳条件。之后将二段硫酸处理的最佳反应条件结合:一段为浓硫酸水解,其酸固比为15∶1,酸浓度60%,水解时间30min,水解温度60℃;二段处理稀酸水解条件为酸固比160∶1,酸浓度6%,水解时间120min,水解温度160℃。采用二段水解处理法,总糖收率为36.78%,该二段处理方法条件温和,不需要高压,适宜应用到实际生产工艺中,因此该研究结果为芒草的进一步有效利用提供了基础。

Sulfuric acid hydrolysis sugar from Miscanthus sinensis（normal pressure two-section acid hydrolysis technology） is studied.The process conditions of normal pressure two-section acid hydrolysis are optimized as follows： the first section hydrolysis in 60% sulphuric acid at 60 ℃ for 30 min,the ratio of acid and solid was 15∶1;the second section acid hydrolysis,the ratio of water and solid was 160∶1,and then the hydrolysis temperature at 160 ℃ for 120 min.The yield of total sugar in hydrolysate can reached 36.78%.