Evaluating process of auto-hydrolysis prior to kraft pulping on production of chemical pulp for end used paper-grade products  

作　　者：Wenchao Jia Miaofang Zhou Chenfeng Yang He Zhang Meihong Niu Haiqiang Shi 

机构地区：[1]Liaoning Key Laboratory of Lignocellulose Chemistry and Biomaterials,College of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China [2]Liaoning Collaborative Innovation Center for Lignocellulosic Biorefinery,College of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China

出　　处：《Journal of Bioresources and Bioproducts》2022年第3期180-189,共10页生物质资源与工程（英文）

基　　金：supported by Natural Science Foundation of China(No.31971608);Natural Science Foundation of Liaoning Province(No.2019-ZD-0125);Liaoning Baiqianwan Talents Program(No.2019);Innovative Talents in Liaoning Uni-versities and Colleges(No.2020).

摘　　要：The objective of this work is to systematically evaluate the performance of the hydrolysis-based kraft pulping process and associated pulp and black liquor characteristics.Acacia wood chips were auto-hydrolyzed under various severities,then the hydrolyzed wood chips were kraft pulping.The results indicated that the yield of pulp significantly dropped with intensifying the auto-hydrolysis severity.Meanwhile,the removal rate of pentosan reached 98.6%in the screened pulp at the P-factor of 1000.The fiber length,fines and fiber crimp of the screened pulp were not affected by the auto-hydrolysis treatment.Auto-hydrolyzed pulps deteriorated fibrillation and beating response of the pulp in a refining process.However,fiber length and fines changed obviously after beating treatment.After auto-hydrolysis,the tensile index of the paper matrices decreased,some particle substances were found on the surface of the pulp fiber,and the solid and organic content of the black liquor were improved.

关 键 词：Auto-hydrolysis Kraft pulping Pulping performance Fiber morphology Black liquor 

分 类 号：TS74[轻工技术与工程—制浆造纸工程]