title: An application study of autohydrolysis pretreatment prior to poplar chemi-thermomechanical pulping.
abstract: This study investigated the autohydrolysis pre-treatment prior to chemi-thermomechanical pulping (CTMP) process including the effects of autohydrolysis pretreatment with a lower severity on characteristics of the autohydrolysis liquor and hydrolyzed chips. The intensity of autohydrolysis, characterized by the severity factor, increased from 1.76 to 3.54, the hydrolyzed chips yield decreased from 99.0% to 86.7% and the xylose extraction yield increased from 0.8% to 44.0%. The content of holocellulose, pentosan and acid soluble lignin remained in the hydrolyzed chips decreased dramatically with increasing the treatment severity. After the autohydrolysis pretreatment, the resultant poplar chemi-thermomechanical pulp with a severity factor of 2.37 could obtain a 15.3 Nm/g tensile index, 58.6% ISO brightness and a 2.39 cm(3)/g bulk.
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China. Electronic address: qingxihou@tust.edu.cn.
authors.forename: Qingxi
authors.initials: Q
authors.lastname: Hou
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China.
authors.forename: Lihui
authors.initials: L
authors.lastname: Liu
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China.
authors.forename: Ningpan
authors.initials: N
authors.lastname: Xu
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
mesh_terms: D019342:Acetic Acid / Q000494:pharmacology; D001709:Biotechnology / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis / Q000187:drug effects; D010209:Paper; D032107:Populus / Q000737:chemistry* / Q000187:drug effects; D013314:Stress, Mechanical; D013696:Temperature; D014934:Wood / Q000737:chemistry
chemical_list: D019342:Acetic Acid
keywords: Autohydrolysis; Chemi-thermomechanical pulping (CTMP); Chemical compositions; Physical properties; Severity factor