Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124 Pisa, Italy.
Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124 Pisa, Italy.
Bioresour Technol. 2019 Dec;293:122050. doi: 10.1016/j.biortech.2019.122050. Epub 2019 Aug 22.
The present work aimed to investigate and optimize the selective exploitation of hemicellulose and cellulose fractions of the energy crop Arundo donax L. (giant reed), to give xylose and levulinic acid, respectively. In order to improve the sustainability of this process, a microwave-assisted hydrolysis in the presence of FeCl was implemented using as substrate the raw biomass without any pretreatment process. The effects of the hydrolysis reaction conditions, such as temperature, reaction time, salt amount and biomass loading, on giant reed exploitation were investigated. In the first step, under the optimized conditions (150 °C, 2.5 min and 1.6 wt% FeCl), the xylose yield reached 98.2 mol%. In the second step, under the best conditions (190 °C, 30 min and 2.4 wt% FeCl), the levulinic acid yield was 57.6 mol%. This novel cascade approach ensured an extensive exploitation of giant reed polysaccharides working in the respect of Green Chemistry principles.
本工作旨在研究和优化能源作物芦竹（Arundo donax L.）半纤维素和纤维素部分的选择性利用，分别得到木糖和乙酰丙酸。为了提高该过程的可持续性，使用未经过任何预处理的原料生物质，在微波辅助下、FeCl 的存在下进行水解。考察了水解反应条件（温度、反应时间、盐用量和生物质负荷）对芦竹利用的影响。在第一步中，在优化条件（150°C，2.5min 和 1.6wt%FeCl）下，木糖得率达到 98.2mol%。在第二步中，在最佳条件（190°C，30min 和 2.4wt%FeCl）下，乙酰丙酸得率为 57.6mol%。这种新颖的级联方法确保了在绿色化学原则下广泛利用芦竹多糖。
