|
二维码（扫一下试试看！） |
| Effects of Acetic Acid-strengthened Hydrothermal Prehydrolysis on the Dissolution of Hemicelluloses from Acacia Wood and the Component and Structure of the Hemicelluloses |
| |
| DOI：10.11981/j.issn.1000-6842.2018.03.1 |
| Key Words:biomass; hydrolysis; hemicelluloses; recovery; hydrothermal |
| Fund Project:国家自然科学基金项目（31470603）； 辽宁省自然科学基金项目（2015020592）；辽宁省“百千万人才工程”培养项目（2014921064）；制浆造纸工程国家重点实验室项目（201746）。 |
| Author Name | Affiliation | | GUO Kai-yuan1 | 1. School of Light Industry & Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning Province, 116034 | | SHI Hai-qiang1,2,* | 1. School of Light Industry & Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning Province, 116034；2.State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | | CAO Nan1 | 1. School of Light Industry & Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning Province, 116034 | | NIU Mei-hong1 | 1. School of Light Industry & Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning Province, 116034 | | PING Qing-wei1 | 1. School of Light Industry & Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning Province, 116034 |
|
| Hits: 3921 |
| Download times: 1042 |
| Abstract: |
| Hydrothermal prehydrolysis and 1.0%(w/w) acetic acid-strengthened hydrothermal prehydrolysis were conducted at 170℃ for the extraction of acacia wood and the dissolved hemicelluloses were recovered by ethanol precipitation. The effects of acetic acid on the composition, content and recovery rate of dissolved hemicelluloses in prehydrolysate, and the composition, molecular weight and structure of recovered hemicelluloses were investigated. Acetic acid could obviously increase the content of oligosaccharide and total saccharides in the prehydrolysate. The optimum prehydrolysis conditions for recovery of dissolved hemicelluloses were at 170℃ for 35 min. The ion chromatography analysis indicated that at the same condition the composition of hemicelluloses recovered from acetic aced hydrothermal prehydrolysate was the same with that from hydrothermal prehydrolysate, but the proportions of xylose and lignin were a little bit higher and proportions of arabinose and galactose were relatively lower. Much lower average molecular weight was found in the hemicelluloses recovered from acetic acid hydrothermal prehydrolysate by the test of gel chromatography. The nuclear magnetic resonance analysis indicated that the obvious presence of LCC structure and much fewer linkage of arabinose were found on the xylan chain of hemicellulose recovered from acetic acid hydrothermal prehydrolysate. |
| View Full Text View/Add Comment Download reader HTML |
|
|
|
