Improving Reaction Selectivity with NaOH Charges and Reaction Time in the Medium Consistency Oxygen Delignification Process
As more delignification is targeted, fiber degradation becomes a main issue in the pulping process. Sodium hydroxide (NaOH) is highly related to pulp quality in the medium consistency oxygen delignification process. Accordingly, the purpose of this research was to study the effect of NaOH charge...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Universitas Indonesia
2020-10-01
|
Series: | International Journal of Technology |
Subjects: | |
Online Access: | https://ijtech.eng.ui.ac.id/article/view/3499 |
Summary: | As more delignification is targeted, fiber
degradation becomes a main issue in the pulping process. Sodium hydroxide (NaOH)
is highly related to pulp quality in the medium
consistency oxygen delignification process. Accordingly, the purpose of
this research was to study the effect of NaOH charges and reaction time on reaction
selectivity during the pulping process through medium consistency oxygen
delignification. This research used Eucalyptus
pelita and Acacia mangium pulp
with a kappa number (KaNo) of 17–18. The medium consistency oxygen
delignification process condition included a temperature of 80°C and oxygen
pressure of 1 bar, while the reaction times were 20, 40, 60, 80, and 100 min.
The NaOH charges were 5, 10, 15, 20, and 25 kg/t of pulp. The analysis
parameters used were KaNo and viscosity. The variation in reaction time did not
show a significant change in KaNo. The increase in reaction time and NaOH
charge variations, meanwhile, can reduce pulp viscosity. Higher NaOH values
significantly increased the delignification degree,
and the higher NaOH charges and reaction times together lowered the degree of
polymerization (DP). The variation in reaction time indicated that with a
longer reaction time, the lower the DP, and with a higher NaOH charge and
longer reaction time, the lower the reaction selectivity. |
---|---|
ISSN: | 2086-9614 2087-2100 |