AchievingRefining Energy Savings and Pulp Propertiesfor Poplar Chemithermomechanical Pulp Improvement through OptimizedAutohydrolysis Pretreatment.

Pretreatmentof biomass is expected to improve the pulp propertiesand facilitate the main components in the raw materials to be betterused. In this work, the refining energy consumption and propertiesof the poplar chemithermomechanical pulp (CTMP) from different autohydrolysispretreatment intensities of wood chips were investigated, and thepulp bleaching ability was also studied. The results showed that theCTMP with autohydrolysis pretreatment at a severity factor of 3.47could have a 26% energy reduction in pressurized refining, a 60% energysaving in PFI refining, and 44% and 46% increases in tensile and tearindices, respectively. Autohydrolysis pretreatment prior to pulpingcould result in CTMP with a higher water retention value, higher finescontent, better strength properties, lower shives content, and lowerbulk and ISO brightness after PFI refining. The brightness of CTMPcan be improved by alkaline peroxide bleaching. [ABSTRACT FROM AUTHOR]