Understanding of pH value and its effect on autohydrolysis pretreatment prior to poplar chemi-thermomechanical pulping.
Understanding of pH value and its effect on autohydrolysis pretreatment prior to poplar chemi-thermomechanical pulping.
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DOI：
10.1016/j.biortech.2015.08.034
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发表时间：
2015-11
影响因子：
11.4
通讯作者：
Lihui Liu;Wei Liu;Q. Hou;Junwei Chen;N. Xu
中科院分区：
文献类型：
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作者：
Lihui Liu;Wei Liu;Q. Hou;Junwei Chen;N. Xu
在化学-热力制浆（CTMP）前对杨木切片进行不同程度的自水解预处理，探讨pH值的变化及其对自水解预处理的影响。结果表明，乙酸的溶出量随预处理的严酷程度的提高而增加，随杨树切片尺寸的减小而减小。此外，还观察了自水解液（AHL）中乙酸的释放量与AHL的pH值之间的对数关系。葡萄糖和木糖（包括单体、低聚物和多糖形式）以及糠醛和羟甲基糠醛（HMF）的含量也在一定程度上取决于AHL的pH值。
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.