The influence of process conditions during pulp storage on the optical properties of Norway spruce high-yield pulps

Enberg, SofiaMittuniversitetet,Institutionen för naturvetenskap, teknik och matematik (-2012) (författare)

The present study is part of a larger work aiming at establishing the knowledge basis needed to develop cost-effective processes for producing high-bright mechanical and chemimechanical pulps. The influence of process conditions (time, pH, temperature, consistency) on the optical properties during pulp storage of a well-washed hydrogen peroxide bleached Norway spruce pulp has been examined. The general effect of storage was darkening of the pulp due to an increase in light absorption, especially at shorter wavelengths. Time and temperature were found to be the process variables that had the largest impact, the trends were similar independent of pH and pulp consistency. The light scattering ability increased initially, giving a positive contribution to brightness. This indicates that the storage also resulted in a change in sheet structure.

TEKNIK OCH TEKNOLOGIER Kemiteknik hsv//swe
ENGINEERING AND TECHNOLOGY Chemical Engineering hsv//eng
Chemimechanical pulp; High yield pulp; Knowledge basis; Norway spruce; Process condition; Process Variables; Pulp consistency; Pulp storage; Sheet structure; Shorter wavelength
Chemical engineering
Kemiteknik

Paulsson, MatsMittuniversitetet,Institutionen för naturvetenskap, teknik och matematik (-2012)(Swepub:miun)matpau (författare)
Rundlöf, M (författare)
Johnsen, I A (författare)
Axelsson, P (författare)
MittuniversitetetInstitutionen för naturvetenskap, teknik och matematik (-2012) (creator_code:org_t)

Ingår i:Proceedings - 2009 International Mechanical Pulping Conference, IMPC 2009, s. 117-121

Av författaren/redakt...: Enberg, Sofia; Paulsson, Mats; Rundlöf, M; Johnsen, I A; Axelsson, P

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