Date of Award
6-1988
Degree Name
Master of Science
Department
Chemical and Paper Engineering
First Advisor
Dr. R. B. Valley
Second Advisor
Dr. E. H. Shriver
Third Advisor
Dr. R. Janes
Fourth Advisor
Mr. W. K. Forester
Access Setting
Masters Thesis-Open Access
Abstract
A review of literature relating sodium sulfite pretreatment during thermomechanical pulping to pulp physical properties revealed many contradictions. Thermomechanical pulping variables were studied for their effect on pulp physical properties. An improvement in pulp physical properties was observed above 1% sodium sulfite treatment. Regression analysis and analysis of variance showed that there was a significant effect of sodium sulfite on the reduction of shive content, pulp brightness, and tear index. Fiber length, tensile, burst, and density were not found to be significantly affected by the amount of sodium sulfite. Sodium sulfite treatment during thermomechanical pulping showed a negative relationship with yield and opacity. Blow pH was not affected by the concentration of sodium sulfite applied at different levels. Sodium sulfite addition reduced the power requirement by about 15% compared to thermomechanical pulping process.
Recommended Citation
Dendukuri, Nagaraju, "A Study of Alkaline Sodium Sulfite Pretreatment of Spruce During Thermomechanical Pulping" (1988). Masters Theses. 1151.
https://scholarworks.wmich.edu/masters_theses/1151