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| Dissolution of Poplar Hemicelluloses during Pre-hydrolysis in Acetic Acid-sodium Acetate Buffer |
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| DOI：10.11981/j.issn.1000-6842.2015.02.1 |
| Key Words:poplar chip；acetic acid-sodium acetate buffers；pre-hydrolysis；monosaccharides；oligosaccharides |
| Fund Project:国家自然科学基金(31370581)。 |
| Author Name | Affiliation | | 张永超1 | 1.齐鲁工业大学制浆造纸科学与技术教育部重点实验室, 山东济南, 250353 | | 傅英娟1 | 1.齐鲁工业大学制浆造纸科学与技术教育部重点实验室, 山东济南, 250353 | | 王兆江1 | 1.齐鲁工业大学制浆造纸科学与技术教育部重点实验室, 山东济南, 250353 | | 秦梦华1, 2,* | 1.齐鲁工业大学制浆造纸科学与技术教育部重点实验室, 山东济南, 250353； 2.泰山学院, 山东泰安, 271021 |
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| Abstract: |
| The dissolution of poplar hemicelluloses during pre-hydrolysis in acetic acid-sodium acetate (AASA) buffer was studied in this work.The results showed that the dissolution of hemicellulose was significantly depended on the buffer pH from 3.0 to 4.2,but was less affected by the buffer concentration from 50 mmol/L to 150 mmol/L.It was observed that both total sugar and monosaccharide contents in pre-hydrolysis liquor (PHL) increased with the decreasing of pH,and the highest oligosaccharides content was obtained at pH 3.4.Compared to hydrolysis only using hot water,pre-hydrolysis with AASA buffer promoted the dissolution of the hemicelluloses and inhibited the degradation of carbohydrate,especially monosaccharides,and consequently lead to higher yield of oligosaccharides and monosaccharides.At the optimized pH of 3.4 and buffer concentration of 100 mmol/L,the dissolution of hemicellulose resulted in 6.47 g/L oligosaccharides and 2.47 g/L monosaccharides,while the degradation products in PHL,acetic acid and furfural were reduced by 46% and 47% respectively comparing with hot water hydrolysis. |
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