Effect of Tree Age on the Soda-Anthraquinone Pulping of Nalita Wood(Trema orientalisis)

M. Sarwar Jahan; Sung-Phil Mun

Journal of Industrial and Engineering Chemistry, Vol.10, No.5, 766-771, September, 2004

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Effect of Tree Age on the Soda-Anthraquinone Pulping of Nalita Wood(Trema orientalisis)

M. Sarwar Jahan, and Sung-Phil Mun^{1, †}

Pulp and Paper Research Division, BCSIR Laboratories, Dhaka, Dhaka-1205, Korea
¹Division of Forest Science, College of Agriculture and Life Sciences, Chonbuk National University, Jeonbuk 561-756, Bangladesh

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The variability in fiber and chemical characteristics of Nalita (Trema orientalis) wood caused by the tree age has been studied. We observed that the lignin, pentosan, and α-cellulose in Nalita wood increased with respect to the tree age. With increasing tree age from 1 to 3 years, the fiber length increased from 0.70 to 0.93 mm and its wall thickness increased from 1.9 to 2.4 μm. The soda-anthraquinone (AQ) pulping of different ages of Nalita wood was also studied by varying the active alkali and cooking time. Upon increasing the active alkali or cooking time, the screened pulp yield increased, while the screened reject and kappa numbers decreased. At a cooking time of 120 min in 17% active alkali, 3-year-old Nalita wood gave about a 49% screened pulp yield with a kappa number of 21. The 3-year-old Nalita pulp showed 7-13% higher strength properties than those of the 1-and 2-year old Nalita woods. For the 3-year-old Nalita pulp, a tear index of 7.8 mNㆍm²/g was observed at a tensile index of about 50 Nㆍm/g.

Keywords:fast-growing wood;soda-AQ;pulp yield;kappa number and strength properties

[References]

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Rockwood DL, Dinus RJ, Kramer JM, MacDonough TJ, CRC for Temperate Hardwood Forestry-IUFRO, pp. 53-59, Hobert (1995)
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FAO, Rome. Forest Division, Tanzania Ministry of Lands, Natural Resources and Tourism, Trees for Village Forestry, The Ministry, Dares Salaam (1986)
Jahan MS, Mun SP, Proc. of the Korea Tech. Assoc. of Pulp & Paper Ind. Conf. pp. 17-26 (2003)
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DeBell JD, Gartner BL, DeBell SD, Can. J. For. Res.-Rev. Can. Rech. For, 28, 603 (1989)
Francis RC, Hausch DL, Granzow SG, Makkonen HP, Kamdem DP, Holz als Roh- und Werkstoff, 59, 49 (2001)
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Paavilainen L, Paperi Ja Puu, 75, 343 (1993)
Bhowmick K, Ph. D. Thesis, University of Dhaka, Bangladesh (1993)

[1] Ogata Y, Nobuchi T, Fujita M, Sahri HM, J. Wood Soc., 48, 89 (2002)

[2] Rockwood DL, Dinus RJ, Kramer JM, MacDonough TJ, CRC for Temperate Hardwood Forestry-IUFRO, pp. 53-59, Hobert (1995)

[3] Jahan MS, Mun SP, J. Korea Tappi, 35, 72 (2003)

[4] Regional Soil Conservation Unit (RSCU). A Selection of Useful Trees and Shrubs for Tanzania, Draft. Nairobi (1992)

[5] FAO, Rome. Forest Division, Tanzania Ministry of Lands, Natural Resources and Tourism, Trees for Village Forestry, The Ministry, Dares Salaam (1986)

[6] Jahan MS, Mun SP, Proc. of the Korea Tech. Assoc. of Pulp & Paper Ind. Conf. pp. 17-26 (2003)

[7] Law KN, Rioux S, Valave JL, TAPPI J., 83, 1 (2000)

[8] Law KN, Daud WRW, TAPPI J., 83, 1 (2000)

[9] Chow P, Rolfe GL, Shupe TF, Proc. of IAWP 2003. Intern. Conference on Forest Products, Better utilization of wood for human, earth and future, pp. 588-592, Taejeon (2003)

[10] Yoon SH, Chai XS, Zhu J, Kim BH, Song BK, J. Ind. Eng. Chem., 9(2), 125 (2003)

[11] Boyce SG, Kaeiser M, TAPPI J., 44, 363 (1961)

[12] Sahri MH, Boupha L, Nobuchi T, Choh SH, Jusoh MZ, New Horizons in Wood Anatomy. Y. S. Kim Ed., pp. 54, Chonnam Nat'l Univ. Press, Kwangju Korea (2000)

[13] Kennedy RW, Smith JH, Pulp Pap. Mag. Can., 60, 35 (1959)

[14] Bendtsen BA, Senft J, Wood Fiber Sci., 18, 23 (1986)

[15] DeBell JD, Gartner BL, DeBell SD, Can. J. For. Res.-Rev. Can. Rech. For, 28, 603 (1989)

[16] Francis RC, Hausch DL, Granzow SG, Makkonen HP, Kamdem DP, Holz als Roh- und Werkstoff, 59, 49 (2001)

[17] Watson P, Hussain A, Sandy R, Gee W, Hotton J, Drummond J, TAPPI J., 2, 26 (2003)

[18] Paavilainen L, Paperi Ja Puu, 75, 343 (1993)

[19] Bhowmick K, Ph. D. Thesis, University of Dhaka, Bangladesh (1993)