Title: Effect of Autohydrolysis on Pre-extraction of Hemicelluloses andSubsequent Kraft Pulping of Triploid Poplar
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.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 2
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