Arid
COOKING OF DRY HIGH-LIGNIN EUCALYPTUS CAMALDULENSIS CHIPS FOLLOWED BY TCF BLEACHING WITH HYDROGEN PEROXIDE
Fiskari, Juha1; Vihela, Tuomas2; Ruuttunen, Kyosti2; Ali-Rekola, Ville2; Hautala, Sanna3; Sixta, Herbert2
通讯作者Fiskari, Juha
来源期刊CELLULOSE CHEMISTRY AND TECHNOLOGY
ISSN0576-9787
出版年2017
卷号51期号:9-10页码:857-861
英文摘要

This paper describes laboratory experiments with Eucalyptus camaldulensis grown in South Asia. Pulping of E. camaldulensis is known to be challenging because of its high lignin content. Moreover, E. camaldulensis chips originating from arid and semi-arid regions of South Asia have often a very low moisture content, which further complicates their pulping. In this research, chips with 5.5% moisture content were screened and the accept fraction underwent a pressurized soaking treatment, which seemingly dissolved carbohydrates, extractives and lignin. The rewetted chips were cooked to a kappa number of 18, oxygen delignified and bleached with hydrogen peroxide. The yield was 45.4% based on unbleached pulp. Pulp viscosities after cooking, oxygen delignification and bleaching were 830, 700, and 600 mL/g, respectively. The high active alkali charge in cooking apparently resulted in low pulp viscosities. In addition to lignin, E. camaldulensis probably contained other polyphenolic compounds, which further consumed alkali. The bleached pulp brightness was 85.5% ISO.


英文关键词conventional batch cooking Eucalyptus camaldulensis dry chips lignin content hydrogen peroxide bleaching
类型Article
语种英语
国家Finland
收录类别SCI-E
WOS记录号WOS:000425762900007
WOS关键词ALKALI IMPREGNATION ; PULP ; SEQUENCE ; GROWTH
WOS类目Materials Science, Paper & Wood
WOS研究方向Materials Science
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/198071
作者单位1.Univ Helsinki, Dept Chem, Lab Organ Chem, AI Virtasen Aukio 1, Helsinki 00560, Finland;
2.Aalto Univ, Sch Chem Technol, Dept Forest Prod Technol, FIN-02015 Espoo, Finland;
3.Finnish Forest Res Inst METLA, POB 18, FIN-01301 Vantaa, Finland
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Fiskari, Juha,Vihela, Tuomas,Ruuttunen, Kyosti,et al. COOKING OF DRY HIGH-LIGNIN EUCALYPTUS CAMALDULENSIS CHIPS FOLLOWED BY TCF BLEACHING WITH HYDROGEN PEROXIDE[J],2017,51(9-10):857-861.
APA Fiskari, Juha,Vihela, Tuomas,Ruuttunen, Kyosti,Ali-Rekola, Ville,Hautala, Sanna,&Sixta, Herbert.(2017).COOKING OF DRY HIGH-LIGNIN EUCALYPTUS CAMALDULENSIS CHIPS FOLLOWED BY TCF BLEACHING WITH HYDROGEN PEROXIDE.CELLULOSE CHEMISTRY AND TECHNOLOGY,51(9-10),857-861.
MLA Fiskari, Juha,et al."COOKING OF DRY HIGH-LIGNIN EUCALYPTUS CAMALDULENSIS CHIPS FOLLOWED BY TCF BLEACHING WITH HYDROGEN PEROXIDE".CELLULOSE CHEMISTRY AND TECHNOLOGY 51.9-10(2017):857-861.
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