کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4998097 | 1459922 | 2016 | 10 صفحه PDF | دانلود رایگان |
- A co-extraction process of soluble and insoluble sugars from ES was developed.
- N series of ES presented a higher recalcitrance to sugar release than T series.
- More than 80% pentose and hexose was recovered for T series of ES.
- A negative correlation for the lignin content, CrI and G/S ratio to ED was observed.
- The heterogenization of chemical composition distribution for HH treated ES was broken.
A process for co-extraction of soluble and insoluble sugars from energy sorghum (ES) was developed based on hydrothermal hydrolysis (HH). Two series of ES were investigated: one (N) with a high biomass yield displayed a higher recalcitrance to sugar release, whereas the second (T) series was characterized by high sugar extraction. The highest total xylose recoveries of 87.2% and 98.7% were obtained for N-11 and T-106 under hydrolysis conditions of 180 °C for 50 min and 180 °C for 30 min, respectively. Moreover, the T series displayed higher enzymatic digestibility (ED) than the N series. The high degree of branching (arabinose/xylose ratio) and acetyl groups in the hemicellulose chains of T-106 would be expected to accelerate sugar release during the HH process. In addition, negative correlations between ED and the lignin content, crystallinity index (CrI) and syringyl/guaiacyl (S/G) lignin ratio were observed. Furthermore, finding ways to overcome the thickness of the cell wall and heterogeneity of its chemical composition distribution would make cellulose more accessible to the enzyme.
Journal: Bioresource Technology - Volume 221, December 2016, Pages 111-120