摘要
秸秆作为一种可靠稳定的可再生资源,面临的最大难题是降解难度大、利用率低。为提高秸秆的全组分、高效利用,以稻秸秆为原材料、单质Cu为催化剂、有机溶剂为浸取剂,开发了高效多相催化浸取降解秸秆方法,实现秸秆全组分利用。考察了不同浸取剂及反应条件对秸秆降解的影响,同时对木质素产物进行了定性分析。结果发现,当秸秆颗粒粒径为250~630μm、催化剂粒径为48~74μm、催化剂与秸秆的质量比为3∶10、秸秆与浸取剂的质量比为1∶10、反应温度为180℃、反应时间为3 h、H 2反应压力为4 MPa、1,4丁二醇与水的质量比为7∶3时,秸秆降解率可达70.2%,可溶性糖和木质素的产率分别达到42.4%和80.6%。多相催化浸取方法为秸秆等生物质资源的高效降解及全组分利用提供了一种有效途径。
As a reliable and stable renewable resource,straw is facing with the biggest problem of difficult degradation and low utilization.In order to improve the full component and efficient utilization of straw,an efficient multiphase catalytic leaching and degradation method of straw was developed with rice straw as raw material,elemental copper as catalyst and organic solvent as leaching agent to realize the full component utilization of straw.The effects of different leaching agents and reaction conditions on straw degradation were investigated,and the lignin products were qualitatively analyzed.Results showed that when the particle size of straw was 250630μm,the particle size of catalyst was 4874μm,the mass ratio of catalyst to straw was 3∶10,the mass ratio of straw to extractant was 1∶10,the reaction temperature was 180℃,the reaction time was 3 h,the reaction pressure of hydrogen was 4 MPa,and the mass ratio of 1,4-butanediol to water was 7∶3,the degradation rate of straw could reach 70.2%,and the yield of soluble sugar and lignin could reach 42.4%and 80.6%,respectively.The heterogeneous catalytic leaching method provided an effective way for the efficient degradation and full component utilization of biomass resources such as straw.
作者
何斌斌
周志伟
武文良
HE Binbin;ZHOU Zhiwei;WU Wenliang(College of Chemical Engineering,Nanjing Tech University,Nanjing 211800,China)
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2023年第2期149-156,共8页
Journal of Nanjing Tech University(Natural Science Edition)
关键词
稻秸秆
多相催化浸取
1
4丁二醇
木质素
rice straw
heterogeneous catalytic leaching
1,4-butanediol
lignin
