林产化学与工业2016，Vol.36Issue(4)：113-120,8.DOI:10.3969/j.issn.0253-2417.2016.04.016
桉木循环强化预水解过程中有机酸变化规律
Organic Acids Variations during Circulation-enhanced Pre-hydrolysis of Eucalyptus
摘要
Abstract
The generation and variations of organic acids during circulation-enhanced pre-hydrolysis of eucalyptus were in present study. The time effects of eucalyptus circulation-enhanced pre-hydrolysis were examined with a 6∶1 ( mL∶g) liquid-solid ratio at 190 ℃ under varied holding time, and then the hot water pre-hydrolysate obtained under the corresponding conditions was used in the circulation-enhanced pre-hydrolysis process with different ratios. The results showed that formic acid and levulic acid contents in the circulation-enhanced pre-hydrolysate firstly increased with the prolonged time and acetic acid content , and then fluctuated at a relative high level. At the same time, total sugars in pre-hydrolysate show a trend of firstly increasing and then declining. The eucalyptus circulation-enhanced pre-hydrolysis was conducted with a 6 ∶ 1 liquid-solid ratio for 60 min under different temperature, and then the obtained pre-hydrolysates were used in the circulation-enhanced pre-hydrolysis process with different ratios. The results showed that formic acid, acetic acid , levulic acid and total sugars contents in the circulation-enhanced pre-hydrolysate increased with the increase of hydrolytic temperature. Among the studies mentioned above, organic acid contents increased with the rising of circulation ratio. Enrichment of organic acids during circulation-enhanced pre-hydrolysis process was beneficial for their utilization and their catalytic actions of pre-hydrolysis process.关键词
桉木/循环/预水解/有机酸Key words
eucalyptus/circulation/pre-hydrolysis/organic acid分类
化学化工引用本文复制引用
郭怀泽,马明帅,李海明,郭延柱,周景辉,崔金龙..桉木循环强化预水解过程中有机酸变化规律[J].林产化学与工业,2016,36(4):113-120,8.基金项目
国家自然科学基金资助项目(31370584) （31370584）
