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Sodium carbonate pre-extraction of bamboo prior to soda-anthraquinone pulping

Characterization of hydrochar obtained from hydrothermal carbonization of wheat straw digestate

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Sodium carbonate pre-extraction of bamboo prior to soda-anthraquinone pulping

Content Provider	Springer Nature Link
Author	Jahan, M. Sarwar Sarkar, Mamon Rahman, M. Mostafizur
Copyright Year	2015
Abstract	A part of hemicelluloses is dissolved in black liquor during pulping process, which can be extracted prior to pulping, that would be used for producing biofuels, biopolymers, paper additives, and other chemicals in addition to pulp. However, the amount of hemicellulose extraction must be limited to maintain pulp yield and pulp quality. In this investigation, hemicelluloses were pre-extracted from bamboo with weak alkali (Na$_{2}$CO$_{3}$) and compared with hot water and dilute H$_{2}$SO$_{4}$ extraction prior to kraft, soda, and soda-anthraquinone (AQ) pulping. Bamboo chips were also pulped by the kraft process without pre-extraction. The biomass dissolution in weak alkaline pre-extraction was 11.1 %, which was 1.2 and 7.9 % lower than the hot water and dilute H$_{2}$SO$_{4}$ pre-extraction, respectively. In the alkaline pre-extraction process, 1.3 % lignin, 1.7 % acetic acid, and about 6.4 % sugars (on oven-dried mass of bamboo) were extracted. The soda-AQ process responded well in terms of pulp yield and pulp quality. Pulp yield after alkaline pre-extraction was higher and kappa number was lower than the hot water and dilute H$_{2}$SO$_{4}$ pre-extraction. Alkaline pre-extraction followed by kraft and soda-AQ pulping produced pulp with lower kappa number than non-extracted kraft pulp at almost similar pulp yield. This pulp showed better results in pre-bleaching with peroxyformic acid. Alkaline pre-extracted kraft and soda-AQ pulps had better tear index and slightly inferior tensile index than the non-extracted kraft pulp after D$_{0}$E$_{p}$D$_{1}$ bleaching. Final brightness for soda-AQ and kraft pulp was 1.1 and 2.8 %, respectively, higher than the control pulp. Alkaline pre-extraction is a better option to integrate pulp mill with hemicellulose extraction and pulp production biorefinery.
Starting Page	417
Ending Page	423
Page Count	7
File Format	PDF
ISSN	21906815
Journal	Biomass Conversion and Biorefinery
Volume Number	5
Issue Number	4
e-ISSN	21906823
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-02-26
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pre-extraction Sugars Soda-AQ pulping Pulp yield Papermaking properties Renewable and Green Energy Biotechnology
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Sodium carbonate pre-extraction of bamboo prior to soda-anthraquinone pulping

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Evaluation of mulberry plant as a pulping raw material

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