Enhanced crystallinity and thermal properties of cellulose from rice husk using acid hydrolysis treatment
Enhanced crystallinity and thermal properties of cellulose from rice husk using acid hydrolysis treatment
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DOI：
10.1016/j.carbpol.2021.117789
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发表时间：
2021-02-22
影响因子：
11.2
通讯作者：
Wakisaka, Minato
中科院分区：
文献类型：
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作者：
Hafid, Halimatun Saadiah;Omar, Farah Nadia;Wakisaka, Minato
采用集成脱木质素工艺从稻壳 (RH) 中提取纤维素，该工艺采用碱处理和酸水解（浓 HNO3）溶解木质纤维素生物质。通过分析木质纤维素含量、热重、官能团、X 射线衍射和表面形态来评估纤维素产量和质量。 HNO3 处理显示纤维素含量增加（2.01 倍），纤维素结晶度有所增强（高达 40.8%）。观察到热性能从 334.6 摄氏度略有增加到 339.3 摄氏度。经济分析表明，与硝酸 (26.7%) 相比，氯萃取可产生更高的纤维素回收率 (58%)，而使用 HNO3 的总运行成本是氯萃取的两倍。硝酸的经济可行性可以通过预处理工艺、化学回收和纤维素回收工艺中的各种进步来提高，因为采用它对于环境可持续性至关重要。
Cellulose was extracted from rice husk (RH) using an integrated delignification process using alkaline treatment and acid hydrolysis (concentrated HNO3) for lignocellulosic biomass dissolution. Cellulose yield and quality were assessed through analysis of lignocellulosic content, thermogravimetric, functional group, X-ray diffraction, and surface morphology. HNO3 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 degrees C to 339.3 degrees C. Economic analysis showed chlorine extraction produce higher cellulose recovery (58%) as compared to HNO3 (26.7%) with the total cost of operation using HNO3 was double compared to chlorine extraction. The economic feasibility of HNO3 can be improved using various progress in the pretreatment process, chemical recycling and cellulose recovery process since adopting it is crucial for environmental sustainability.