Achieving Refining Energy Savings and Pulp Properties for Poplar Chemithermomechanical Pulp Improvement through Optimized Autohydrolysis Pretreatment
Achieving Refining Energy Savings and Pulp Properties for Poplar Chemithermomechanical Pulp Improvement through Optimized Autohydrolysis Pretreatment
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DOI：
10.1021/ie503244b
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发表时间：
2014-10
影响因子：
4.2
通讯作者：
Q. Hou;Lihui Liu;Wei Liu;Yang Wang;N. Xu;Qian Liang
中科院分区：
文献类型：
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作者：
Q. Hou;Lihui Liu;Wei Liu;Yang Wang;N. Xu;Qian Liang
生物质预处理有望改善纸浆性能，促进原料中主要成分的更好利用。研究了不同自水解预处理强度的白杨化学热磨机械浆（CTMP）的磨浆能耗和性能，并对纸浆的漂白性能进行了研究。结果表明，在苛刻度因子为3.47的条件下，自水解预处理CTMP在加压磨浆时可节能26%，在PFI磨浆时可节能60%，CTMP的抗张强度和撕裂强度分别提高44%和46%。制浆前的自水解预处理可使CTMP具有较高的保水值、较高的细小纤维含量、较好的强度性能、较低的碎片含量以及较低的松厚度和ISO白度。采用碱性过氧化氢漂白可以提高CTMP的白度。
Pretreatment of biomass is expected to improve the pulp properties and facilitate the main components in the raw materials to be better used. In this work, the refining energy consumption and properties of the poplar chemithermomechanical pulp (CTMP) from different autohydrolysis pretreatment intensities of wood chips were investigated, and the pulp bleaching ability was also studied. The results showed that the CTMP with autohydrolysis pretreatment at a severity factor of 3.47 could have a 26% energy reduction in pressurized refining, a 60% energy saving in PFI refining, and 44% and 46% increases in tensile and tear indices, respectively. Autohydrolysis pretreatment prior to pulping could result in CTMP with a higher water retention value, higher fines content, better strength properties, lower shives content, and lower bulk and ISO brightness after PFI refining. The brightness of CTMP can be improved by alkaline peroxide bleaching.