超声预处理对热压水热转化稻壳制备生物油产率的影响。
Influence of ultrasonic pretreatment on the yield of bio-oil prepared by thermo-chemical conversion of rice husk in hot-compressed water.
机构信息
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, China.
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, China.
出版信息
Bioresour Technol. 2013 Oct;146:355-362. doi: 10.1016/j.biortech.2013.07.094. Epub 2013 Jul 26.
The aim of the current study is to investigate the feasibility of thermo-chemical conversion of rice husk in hot-compressed water via ultrasonic pretreatment to increase the bio-oil yield. The results show that ultrasonic pretreatment remarkably changes the structures of the rice husk, such as enhancing swelling and surface area, eroding lignin structure, and resulting in more exposure of the cellulose and hemicellulose. The highest bio-oil yield of 42.8% was obtained from the thermo-chemical conversion at 300 °C and 0 min of the residence time for the 1 h pretreated rice husk. GC-MS analysis indicates that the relative contents of phenols, 5-Hydroxymethylfurfural, and lactic acid are higher in bio-oils obtained from the pretreated rice husks than that from the raw rice husk.
本研究旨在探讨通过超声预处理热压热水热化学转化稻壳以提高生物油产率的可行性。结果表明，超声预处理可显著改变稻壳的结构，如增强稻壳的溶胀和比表面积、侵蚀木质素结构，从而使更多的纤维素和半纤维素暴露出来。在 300℃和 0min 的停留时间下，对预处理 1 小时的稻壳进行热化学转化，可获得最高 42.8%的生物油产率。GC-MS 分析表明，与原稻壳相比，预处理稻壳获得的生物油中酚类、5-羟甲基糠醛和乳酸的相对含量更高。
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