| Comparative Study of Isolated Polysaccharides from Triploid Poplar Using Different Solvents and Chemicals |
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| Author Name | Affiliation | | YingYing Chai1 | 1. Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China | | Ning Zhao1 | 1. Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China | | YunShan Ju1 | 1. Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China | | QingTao Fan2 | 2. Beijing Institute of Science and Technology Information, Beijing 100044, China | | Kun Wang1,* | 1. Beijing Key Laboratory of Lignocellulosic Chemistry, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China |
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| Fund Project:This work was financially supported by the Fundamental Research Funds for the Central Universities (2017TP13), the National Key R&D Program of China (2016YFD0600803), 2018 National Student Research Training Program (201710022033) and the Innovation Program of College of Materials Science and Technology. This paper was also supported by the 2017 the international Clean Energy Talent program (No.201702660054). The authors also thank the colleagues for their valuable suggestions during the course of this work. |
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| Abstract:The conversion of lignocellulose to value-added products is normally focused on fuel production; however, large-scale biorefineries require a cost-effective pretreatment process that can effectively fractionate the three main constituents of lignocellulose for the production of chemicals, fuels, and materials. In this study, a hemicellulosic biopolymer from poplar was fractionated by a mild organosolv process and the effects of various chemicals (sodium hydroxide, triethylamine, and formic acid) and alcohols on the fractionation efficiency and structural variation of hemicellulose were examined. Comparative studies indicated that an acidic catalyst decreased the purity of hemicelluloses by partial degradation of cellulose, and the core of the hemicellulosic biomacromolecule could be released and dissolved under alkaline conditions with 5.8%~19.0% yields. In addition, the use of alcohol with longer alkyl chains facilitated the release of the hemicellulosic biomacromolecule by partially cleaving the ether bonds in the lignin-carbohydrate complex (LCC); this is probably due to steric hindrance. The thermal degradation behavior showed that complete pyrolysis was easily achieved for the hemicellulosic polymer with minimal branches irrespective of its molecular weight. |
| keywords:organosolv fractionation biorefinery hemicelluloses, thermal property |
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