title: Understanding of pH value and its effect on autohydrolysis pretreatment prior to poplar chemi-thermomechanical pulping.
abstract: Autohydrolysis pretreatment with different severity factors was performed on poplar chips prior to chemi-thermomechanical pulping (CTMP) in order to investigate the change in pH value and its effect on the autohydrolysis pretreatment. The results showed that the dissolution amount of acetic acid increased with raising the severity factor of the pretreatment and declining the size of poplar chips, respectively. Besides, a logarithmic relationship between the amount of acetic acid released in the autohydrolysis liquor (AHL) and pH value of the AHL was observed. The amounts of glucose and xylose (including those in the form of monomers, oligomers, and polysaccharides) as well as furfural and hydroxymethylfurfural (HMF) also depended on the pH value of the AHL to some extent.
authors: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China.
authors: Lihui
authors: L
authors: Liu
authors: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China; Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education, Qilu University of Technology, Jinan 250353, China.
authors: Wei
authors: W
authors: Liu
authors: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China. Electronic address: qingxihou@tust.edu.cn.
authors: Qingxi
authors: Q
authors: Hou
authors: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China.
authors: Junwei
authors: J
authors: Chen
authors: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China.
authors: Ningpan
authors: N
authors: Xu
mesh_terms: D019342:Acetic Acid; D005662:Furaldehyde; D005947:Glucose; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D032107:Populus / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*; D014994:Xylose
chemical_list: D014994:Xylose; D005662:Furaldehyde; D005947:Glucose; D019342:Acetic Acid
keywords: Acetic acid; Autohydrolysis; Chemi-thermomechanical pulping (CTMP); pH value