Simulating the impact of kraft pulping and bleaching parameters on Eucalyptus camaldulensis pulp properties using MATLAB

✍ Scribed by Pedram Fatehi; Shahab Arabshahi; Zainab Ziaee; Raimo O. Malinen; Yonghao Ni

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 339 KB
• Volume: 88
• Category: Article
• ISSN: 0008-4034
• DOI: 10.1002/cjce.20299

✦ Synopsis

Abstract

In this work, Eucalyptus camaldulensis was evaluated as the raw material for chemical pulp under different pulping and bleaching conditions. The pulping was carried out at different H‐factors, and at different effective alkalis. The resulting pulps were then oxygen delignified and bleached using various dosages of bleaching chemicals in a D~0~EpD~1~ sequence. The effect of independent variables (pulping or bleaching variables) on dependent variables (pulp properties) was analysed based on the multivariable least square method via MATLAB software. An agreement was found between the results predicted from the models and the experimental data. To obtain a kappa number of 15, the optimum pulping conditions were a temperature of 155°C, a time of 225 min, and an EA of 23%. Also, the hexenuronic acid (HexA) content of cooked pulp was significantly decreased in the chlorine dioxide bleaching stages, and was only marginally related to the final HexA content of bleached pulps.