| RELATIVE IMPORTANCE OF WOOD DENSITY AND CARBOHYDRATE CONTENT ON PULPING YIELD AND PRODUCT QUALITY |
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| 引用本文： | Colodette, J.L.,Mokfienski, A.,Gomide, J.L.,Oliveira, R.C.. RELATIVE IMPORTANCE OF WOOD DENSITY AND CARBOHYDRATE CONTENT ON PULPING YIELD AND PRODUCT QUALITY[J]. 天津科技大学学报, 2004, 19(Z1) |
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| 作者姓名： | Colodette J.L. Mokfienski A. Gomide J.L. Oliveira R.C. |
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| 作者单位： | Forestry Engineering DepartmentFederal University of Vicosa Vicosa，MG 36.570-000，Brazil，Forestry Engineering DepartmentFederal University of Vicosa Vicosa，MG 36.570-000，Brazil，Forestry Engineering DepartmentFederal University of Vicosa Vicosa，MG 36.570-000，Brazil，Forestry Engineering DepartmentFederal University of Vicosa Vicosa，MG 36.570-000，Brazil |
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| 摘 要： | INTRODUCTIONPulp quality depends on wood quality and pulping process conditions. Wood quality is a result of forestry management practices and a combination of genetic, physical, anatomical and chemical characteristics of the wood [35]. Eucalypt pulps are desired for printing and writing and for tissue paper grades due to their anatomical and chemical characteristics. It has been shown that wood density exerts significant influence on pulp quality [21]. This parameter, together with volum…
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RELATIVE IMPORTANCE OF WOOD DENSITY AND CARBOHYDRATE CONTENT ON PULPING YIELD AND PRODUCT QUALITY |
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| Colodette J.L,Mokfienski A,Gomide J.L,Oliveira R.C. RELATIVE IMPORTANCE OF WOOD DENSITY AND CARBOHYDRATE CONTENT ON PULPING YIELD AND PRODUCT QUALITY[J]. Journal of Tianjin University of Science & Technology, 2004, 19(Z1) |
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| Authors: | Colodette J.L Mokfienski A Gomide J.L Oliveira R.C |
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| Affiliation: | Forestry Engineering DepartmentFederal University of Vicosa Vicosa, MG 36.570-000, Brazil |
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| Abstract: | SUMMARYThe purpose of this study was to evaluate basic density, chemical composition and fiber dimensions of ten Eucalyptus sp wood samples and verify the impact of this set of parameters and their combination on the Kraft pulping process yield and on bleached pulp quality. Ten eucalypt woods of different species, with basic densities varying from 365 to 544 kg/m3 and total wood carbohydrate contents varying from 70.0 to 74.5%, were transformed into kraft pulp of kappa number 17-18 and bleached to 90% ISO brightness by the sequence OD(PO)D. Wood basic density showed stronger correlations with fiber dimensions, pulping yield and pulp quality than did chemical composition. Lighter woods resulted in higher yields. However, wood specific consumption was lower for denser woods, even though these demanded more drastic pulping conditions to achieve a given kappa number. The pulp quality results suggest that lower density woods should be directed towards fabrication of refined paper (printing and writing grades) while the denser woods be directed to the sanitary papers segment (tissue grades). |
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| Keywords: | Eucalyptus wood density chemical composition fiber dimensions bleached kraft pulp. |
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