草酸酪氨酸离子液体水解小麦秸秆制备还原糖的研究
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摘要
以小麦秸秆为原料,考察草酸酪氨酸离子液体对小麦秸秆的低温高效水解性能。研究离子液体种类、离子液体用量、反应温度、反应时间4个因素对总转化率、葡萄糖收率、木糖收率等评价指标的影响。草酸酪氨酸离子液体水解秸秆的最佳工艺条件为:反应时间3 h,反应温度90℃,离子液体用量0.4 mmol,此条件下的总还原糖收率为86.3%。所制备的草酸酪氨酸离子液体具有良好的循环利用性能,在5次重复使用之后,其对小麦秸秆转化率仍较高。
The performance of low temperature and high efficiency hydrolysis of wheat straw with oxalate tyrosine ionic liquid was investigated with wheat straw as raw material. The effects of 4 factors,including ionic liquids,ionic liquid dosage,reaction temperature and reaction time,on the total conversion rate,glucose yield and xylose yield were studied.The best hydrolysis conditions obtained by single factor experiment were as follows:reaction time 3 h,reaction temperature 90 ℃,ionic liquid dosage 0.4 mmol. And under this condition,the total reducing sugar yield was 86.3%.Moreover,the ionic liquids exhibited excellent recycling performance. After 5 times of repeated use,the conversion rate of wheat straw was not significantly reduced.
The performance of low temperature and high efficiency hydrolysis of wheat straw with oxalate tyrosine ionic liquid was investigated with wheat straw as raw material. The effects of 4 factors,including ionic liquids,ionic liquid dosage,reaction temperature and reaction time,on the total conversion rate,glucose yield and xylose yield were studied.The best hydrolysis conditions obtained by single factor experiment were as follows:reaction time 3 h,reaction temperature 90 ℃,ionic liquid dosage 0.4 mmol. And under this condition,the total reducing sugar yield was 86.3%.Moreover,the ionic liquids exhibited excellent recycling performance. After 5 times of repeated use,the conversion rate of wheat straw was not significantly reduced.
引文
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[2]Blanch Harvey W, Simmons Blake A, Klein Marcuschamer Daniel. Biomass deconstruction to sugars[J]. Biotechnology Journal,2011,6(9):1086—1102.
[3]Canettieri E V, Rocha G J. Optimization of acid hydrolysis from the hemicellulosic fraction of Eucalyptus grandis residue using response surface methodology[J].Bioresource Technology,2007,98(2):422—428.
[4]Herrera A,Tellez Luis S J,Ramirez J A,et al.Production of xylose from sorghum straw using hydrochloric acid[J]. Journal of Cereal Science,2003,37(3):267—274.
[5]Onda A,Ochi T,Yanagisawa K. Hydrolysis of cellulose selectively into glucose over sulfonated activated carbon catalyst under hydrothermal conditions[J]. Topics in Catalysis,2009,52(6/7):801—807.
[6]Brandt A,Gr?svik J,Hallett JP,et al. Deconstruction of lignocellulosic biomass with ionic liquids[J]. Green Chemistry,2013,15:550—583.
[7]Cvjetko Bubalo M, Radosevic K, Radojcic Redovnikovic I,et al. A brief overview of the potential environmental hazards of ionic liquids[J]. Ecotoxicology and Environmental Safety,2014,99:1—12.
[8]Liu Qiuping,Hou Xuedan,Li Ning,et al. Ionic liquids from renewable biomaterials:Synthesis,characterization and application in the pretreatment of biomass[J]. Green Chemistry,2012,14:304—307.
[9]Hou Xuedan,Smith Thomas J,Li Ning,et al. Novel renewable ionic liquids as highly effective solvents for pretreatment of rice straw biomass by selective removal of lignin[J]. Biotechnology and Bioengineering,2012,109:2484—2493.
[10]Hou Xuedan, Li Ning, Zong Minghua. Facile and simple pretreatment of sugar cane bagasse without size reduction using renewable ionic liquids-water mixtures[J]. ACS Sustainable Chemistry&Engineering,2013,1:519—526.
[11]郑勇,彭聪虎,郑永军,等.半纤维素在离子液体中的溶解和再生过程研究[J].轻工学报,2016,31(2):15—20.[11]Zheng Yong,Peng Conghu,Zheng Yongjun,et al.Study on the dissolution and regeneration of hemicellulose in ionic liquids[J]. Proceedings of the Light Industry,2016,31(2):15—20.