Rice husks is a residue with relevant amount of cellulose, hemicelluloses and lignin. The potential of deep eutectic solvent was investigated in rice husks pretreatment to delignification and increase in cellulose content. Sequential subcritical water hydrolysis was applied in the best pretreatment condition aiming to produce fermentable sugars. Fourier Transform Infrared Spectroscopy was used in pretreated rice husks to evaluated the increase in cellulose content at different pretreatment time (1, 2, 4 and 6 h), with choline chloride: glycerol and choline chloride: urea. The lignocellulosic composition was determined by thermogravimetric analysis. In the assay at 230 °C with R of 40, the highest yields of reducing sugars were obtained (49.9 ± 2.41 g/100 g biomass) and efficiency (67.91 ± 3.28 g sugars/100 g carbohydrates).

稻壳是含有相关量纤维素、半纤维素和木质素的残留物。研究了深共熔溶剂在稻壳预处理中对脱木素和增加纤维素含量的潜力。在最佳预处理条件下应用顺序亚临界水水解，旨在生产可发酵糖。傅里叶变换红外光谱用于预处理稻壳，以评估不同预处理时间（1、2、4 和 6 小时）纤维素含量的增加，氯化胆碱：甘油和氯化胆碱：尿素。木质纤维素组成通过热重分析确定。在 R 为 40 的 230 °C 测定中，获得了最高的还原糖产量（49.9 ± 2.41 g/100 g 生物质）和效率（67.91 ± 3.28 g 糖/100 g 碳水化合物）。