Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu, 808-0196, Japan.
Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
Carbohydr Polym. 2021 May 15;260:117789. doi: 10.1016/j.carbpol.2021.117789. Epub 2021 Feb 13.
Cellulose was extracted from rice husk (RH) using an integrated delignification process using alkaline treatment and acid hydrolysis (concentrated HNO) for lignocellulosic biomass dissolution. Cellulose yield and quality were assessed through analysis of lignocellulosic content, thermogravimetric, functional group, X-ray diffraction, and surface morphology. HNO treatment showed an increment (2.01-fold) in the cellulose content and some enhancement in the crystallinity of cellulose (up to 40.8%). A slight increase was observed in thermal properties from 334.6 °C to 339.3 °C. Economic analysis showed chlorine extraction produce higher cellulose recovery (58%) as compared to HNO (26.7%) with the total cost of operation using HNO was double compared to chlorine extraction. The economic feasibility of HNO can be improved using various progress in the pre-treatment process, chemical recycling and cellulose recovery process since adopting it is crucial for environmental sustainability.
采用碱性处理和酸水解（浓 HNO）集成脱木质素工艺从稻壳（RH）中提取纤维素，用于木质纤维素生物质溶解。通过分析木质纤维素含量、热重分析、官能团、X 射线衍射和表面形貌来评估纤维素的得率和质量。HNO 处理显示纤维素含量增加（2.01 倍），纤维素结晶度略有提高（高达 40.8%）。热性能从 334.6°C 略有升高至 339.3°C。经济分析表明，与 HNO（26.7%）相比，氯气萃取法的纤维素回收率更高（58%），使用 HNO 的操作总成本是氯气萃取法的两倍。通过预处理过程、化学回收和纤维素回收过程中的各种进展，可以提高 HNO 的经济可行性，因为采用它对于环境可持续性至关重要。
