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| Effect of Autohydrolysis on Pre-extraction of Hemicelluloses and Subsequent Kraft Pulping of Triploid Poplar |
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| DOI：10.11981/j.issn.1000-6842.2013.02.1 |
| Key Words:biorefinery； hemicellulose； autohydrolysis； P-factor； extraction ratio of pentosan |
| Fund Project:“十二五”国家科技支撑计划项目（2011BAC11B02）。 |
| Author Name | Affiliation | | 段 超1，2 | 1.中国制浆造纸研究院，北京，100102；2.制浆造纸国家工程实验室，北京，100102 | | 冯文英1，2 | 1.中国制浆造纸研究院，北京，100102；2.制浆造纸国家工程实验室，北京，100102 | | 张艳玲3 | 3.华博企联技术咨询有限公司，北京，100020 | | 徐 明1，2 | 1.中国制浆造纸研究院，北京，100102；2.制浆造纸国家工程实验室，北京，100102 | | 张升友1，2 | 1.中国制浆造纸研究院，北京，100102；2.制浆造纸国家工程实验室，北京，100102 |
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| Abstract: |
| Based on the concept of biorefinery in pulp and paper industry, pre-extracting hemicelluloses sugars from poplar chips via autohydrolysis was carried out , and then the extracted chips were used for the kraft pulping. The influence of P-factor on pre-hydrolysis and subsequent kraft pulping were investigated. The results indicated that autohydrolysis is a satisfactory process for pre-extracting hemicelluloses, and the autohydrolysis process can be well controlled by the P-factor. Besides, autohydrolysis treatment can significantly improve the deligninfication efficiency in subsequent kraft pulping, decrease the EA charge at the sacrifice of the beatability of the pulp and some physical properties of the paper. Considering the subsequent biomass utilization of pre-hydrolysis and pulping performance of the treated wood chips, the P-factor of autohydrolysis is controlled in the range from 608 to 1060, which the extraction rate of pentosan in pre-hydrolysate is from 33.18% to 35.31% and the yield of the kraft pulp is from 39.47% to 37.12%. Compared with the control sample, the properties of the kraft pulp and the pulping black liquor of the pre-hydrolysis treated sample are better at the reasonable P-factor. |
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