桉木热水预水解液成分的变化规律
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摘要
采用固定液比(5∶1),在不同预水解温度(150~190℃)和保温时间(0~120min)下对桉木进行热水预水解研究。利用离子色谱仪定量表征原料及预水解液中糖组分,并测定预水解液的pH、酸溶木素以及糠醛类物质质量分数。确定最佳预水解条件为:液比5∶1,预水解温度190℃,保温时间60min。研究揭示预水解过程中各组分变化规律,为桉木综合利用平台建设提供了理论基础。
Eucalyptus was pre-hydrolyzed by hot water under varied pre-hydrolysis temperature(150-190 ℃),different holding time(0-120 min)and fixed mass ratio of liquid to solid(5∶1).Sugar components in raw material and pre-hydrolysate were determined by ion chromatography,and pH,contents of acid-soluble lignin and furfuraldehydes in pre-hydrolysate were also analyzed.The optimum pre-hydrolysis conditions were obtained as follows:mass ratio of liquid to solid of 5∶1,pre-hydrolysis temperature of 190℃,and holding time of 60 min.The changes of main components in eucalyptus during the pre-hydrolysis process were found out,which could lay a theoretical foundation for comprehensively utilization of eucalyptus.
Eucalyptus was pre-hydrolyzed by hot water under varied pre-hydrolysis temperature(150-190 ℃),different holding time(0-120 min)and fixed mass ratio of liquid to solid(5∶1).Sugar components in raw material and pre-hydrolysate were determined by ion chromatography,and pH,contents of acid-soluble lignin and furfuraldehydes in pre-hydrolysate were also analyzed.The optimum pre-hydrolysis conditions were obtained as follows:mass ratio of liquid to solid of 5∶1,pre-hydrolysis temperature of 190℃,and holding time of 60 min.The changes of main components in eucalyptus during the pre-hydrolysis process were found out,which could lay a theoretical foundation for comprehensively utilization of eucalyptus.
引文
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[2]YEDRO F M,CANTERO D A,PASCUAL M,et al.Hydrothermal fractionation of woody biomass:lignin effect on sugars recovery[J].Bioresource Technology,2015,191:124-132.
[3]许凤,孙润仓,詹怀宇.木质纤维原料生物转化燃料乙醇的研究进展[J].纤维素科学与技术,2004,12(1):45-54.
[4]于建仁,张曾,迟聪聪.生物质精炼与制浆造纸工业相结合的研究[J].中国造纸学报,2008,23(1):80-84.
[5]李萍萍,雷以超,陈灿,等.热水预水解对松木及其水解液主要化学成分的影响[J].中国造纸,2012,11:1-6.
[6]韦希勤.我国速生丰产林现状与存在的问题[J].林业调查规划,2010(5):115-118.
[7]石淑兰,何福望.制浆造纸分析与检测[M].北京:中国轻工业出版社,2010.
[8]LI H M,SAEED A,JAHAN M S,et al.Hemicellulose removal from hardwood chips in the pre-hydrolysis step of the kraft-based dissolving pulp production process[J].Journal of Wood Chemistry and Technology,2010,30(1):48-60.
[9]梁立娜,张萍,蔡亚岐,等.高效阴离子交换-脉冲安培检测同时分析单糖和糖醛酸[J].化学分析,2006,34(10):1371-1374.
[10]迟聪聪,张曾,刘轩.桉木木片高温预水解反应历程的研究[J].中国造纸,2008,27(12):6-10.
[11]张翠,柴欣生,罗小林,等.紫外光谱法快速测定生物质提取液中的糠醛和羟甲基糠醛[J].光谱学与光谱分析,2010,30(1):247-250.
[12]HELLE S,CAMERON D,JANET L.Effect of inhibitory compounds found in biomass hydrolysates on growth and xylose fermentation by genetically engineered strain of S.cerevisiae[J].Enzyme and Microbial Technology,2003,33(6):786-792.
[13]潘红梅,孙西玉,樊耀亭.气相色谱法测定秸秆水解液中的糠醛和乙酸含量[J].酿酒科技,2008(5):108-110.
[14]江滔,路鹏,李国学.玉米秸秆稀酸水解时糠醛形成原因及影响因素[J].农业工程学报,2009,25(7):185-189.
[15]LI H M,SAEED A,JAHAN S,et al.Formation of acetic acid from the kraft-based dissolving pulp production process[M]//96th Annual Meeting Preprints.Montreal:Pulp and Paper Technical Association of Canada,2010:151-155.