Behavior of Decayed Spruce (Picea abies) during Kraft Pulping |
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作者姓名: | Halonen Markku Alén Raimo |
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摘 要: |
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收稿时间: | 2020/6/7 0:00:00 |
Behavior of Decayed Spruce (Picea abies) during Kraft Pulping |
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Affiliation: | Laboratory of Applied Chemistry, Department of Chemistry, University of Jyv?skyl?, FI-40014, Finland |
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Abstract: | This study indicated that by applying an improved classification system to decayed large-diameter Norway spruce (Picea abies) wood, its use as raw material for kraft pulping without loss of pulp quality could be essentially increased. This is based on the fact that although the cooking yield of decayed spruce material which has been sorted according to these new recommendations is somewhat lower and Kappa number higher than those of sound wood material, the greatest part of the decayed stem (the outer part of the stem) contains long-fiber wood material which produces pulp of good quality. Therefore, large-diameter spruce logs can also be separately used, for example, in the manufacture of reinforcement pulp. |
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Keywords: | Norway spruce kraft pulping wood decay fungal decay soft rot |
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