详细信息
文献类型:期刊文献
中文题名:玉米秸秆中半纤维素的微波-碱预提取工艺
英文题名:Pre-extraction of Hemicellulose from Corn Stover under Microwave Irradiation
作者:邹安[1];沈春银[1];赵玲[1];戴干策[1]
机构:[1]华东理工大学化学工程联合国家重点实验室,上海200237
年份:2010
卷号:36
期号:4
起止页码:469
中文期刊名:华东理工大学学报(自然科学版)
外文期刊名:Journal of East China University of Science and Technology
收录:CSTPCD;;Scopus;北大核心:【北大核心2008】;CSCD:【CSCD2011_2012】;
基金:长江学者和创新团队发展计划(IRT0721);高等学校学科创新引智计划(B08021);华东理工大学化学工程联合国家重点实验室自主开放课题
语种:中文
中文关键词:玉米秸秆;半纤维素;微波-碱预提取
外文关键词:corn stover ; hemicellulose; microwave-alkali pre-extraction
摘要:研究了玉米秸秆中半纤维素的微波-碱预提取工艺。实验结果表明:与碱预提取相比,微波-碱预提取不仅能提高半纤维素得率(增幅为10%-30%),还能提高半纤维素的提取速率,处理时间从2 h甚至是20 h加快到20 min。还研究了液固比(每克秸秆对应加水的毫升数)、碱用量(每克秸秆对应加入氢氧化钠的克数)、处理时间、微波功率以及温度等因素对半纤维素得率的影响,得到了最优提取条件为:液固比20、碱用量1.5、处理时间20 min、微波功率1167 W,秸秆粒径40目。此外,采用红外光谱对所提取的半纤维素进行分析,探讨了微波-碱预提取工艺机理。
Pre-extraction of hemicellulose from corn stover under microwave irradiation was studied in this paper. The experimental results indicated that the extraction yield of hemicellulose was increased by 10% to 30% under microwave irradiation in 20 min, comparing to that without microwave irradiation in 2 h even 20 h. The effect of liquid-to-solid ratio (V (water) " m (stover)), alkali consumption (m(NaOH)" m (stover)), time, microwave power, and temperature on the extraction yield of hemicellulose was also investigated. The optimal processing parameters were: liquid-to-solid ratio of 20, alkali consumption of 1.5, time of 20 min, microwave power of 1 167 W, and the particle size of 40 mesh per square inch. The obtained hemicellulose was qualitatively analyzed by IR spectroscopy, and the mechanism of microwave-alkali process was also discussed.
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