NOVEL METHOD FOR ESTIMATION KRAFT PULP YIELD OF FAST-GROWING EUCALYPTUS
In this study, a wide range of kraft pulps from fast-growing eucalyptus were produced and measured for pulp yield, kappa number and hexenuronic acid (HexA) content, respectively. We also investigated the variation of kraft pulp yield with HexA-free kappa number and HexA content in pulps under all kraft pulping conditions studied in this research. The results demonstrated that kraft pulp yield of fast-growing eucalyptus was linearly decreased with the reduction of HexA-free kappa number at a faster and slower speed in two different stages, respectively. A transition point of a measured pulp yield of 48.7 was observed between these two stages. Differently, HexA content associated with the percentage of carbohydrate in pulp, especially hemicellulose, was linearly increased with the reduction of yield at first; however, it decreased with the further reduction of measured pulp yield. Moreover, it was interesting to note that a transition point of a HexA content of 67μmol/g also existed between the two stages, coincidently, which was consistent to the transition point of a measured kappa number of 15.7. Then, based on the above results, we developed a novel empirical model to predict kraft pulp yield of fast-growing eucalyptus. Under a wide range of cooking conditions studied in this research, a linear regression coefficient of 92.60％ suggested that this method could accurately predict kraft pulp yield of fast-growing eucalyptus ranging from 46％ to 52％.
novel method estimation kraft pulp yield fast-growing eucalyptus transition point kappa number lignin content HexA content
Luo Xiaolin Zhan Huaiyu Chai Xinsheng Hu Huichao Zhan Yao
State Key Laboratory of Pulp and Paper Engineering,South China University of Technology, Guangzhou,510640, China
国际会议
广州
英文
992-995
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）