Effect of pulping variables with dimethyl formamide on the characteristics of bagasse-fiber
Organosolv pulping of bagasse was conducted following a central composite design using a two-level factorial plan involving three pulping variables (temperature: 190–210 °C, time: 120–180 min, organic solvent ratio: 40–60% dimethyl formamide). Responses of pulp and handsheets properties to the proce...
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Veröffentlicht in: | Bioresource technology 2005-10, Vol.96 (15), p.1658-1669 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Organosolv pulping of bagasse was conducted following a central composite design using a two-level factorial plan involving three pulping variables (temperature: 190–210
°C, time: 120–180
min, organic solvent ratio: 40–60% dimethyl formamide). Responses of pulp and handsheets properties to the process variables were analyzed using statistical software (MINITAB 14). Using values of the independent variables the variation ranges considered provided the following optimum values of the dependent variables: 82.7% (yield), 92.9 (kappa number), 1.403% (ash), 370
ml (freeness), 6290
m (breaking length), 9.4 (folding endurance), 5.955
mN
m
2
g
−1 (Tear index) and 2.811
kNg
−1 (Burst index) for pulps and handsheets. Results showed that acceptable physical and mechanical properties of pulps and papers similar the pulp used for bleaching could be achieved at 210
°C for 150
min and 50% DMF. These are the most suitable conditions for obtaining paper sheets with a high breaking length, tear and burst indices. Also bagasse could be pulped with ease to about 55.72% yield with kappa number ∼35. The cooking temperature was a significant factor while the DMF ratio and cooking time were not as important in term of the properties of the resultant pulps and papers. |
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ISSN: | 0960-8524 1873-2976 |
DOI: | 10.1016/j.biortech.2004.12.030 |