NDLI: A Continuous Hydrothermal Saccharification Approach of Rape Straw Using Dilute Sulfuric Acid

Content Provider	Springer Nature Link
Author	Ji, Wenchao Shen, Zhemin Wen, Yujuan
Copyright Year	2014
Abstract	The fossil fuel crisis in the world has raised much concern on developing biomass energy. Fermentable sugars are an important product which can be converted to bioethanol. Although sulfuric acid saccharification is a good method for breaking lignocellulose biomass, efficiency is not well-promoted in dilute acid, as many fermentation inhibitors are co-produced. A continuous saccharification approach was established in this study to reach high saccharification efficiency and low toxicity of reducing sugar (RS). The dilute H$_{2}$SO$_{4}$ was taken as flow phase in this process with temperature gradient elevation. Each sample of 250 ml was taken when temperature elevated from 60 to 230 °C (temperature interval 20–30 °C). Under optimum conditions, the maximum RS yield ratio reaches 53.4 %. Furfural is detected in the hydrolysate, with a concentration less than 1.06 g/l. The optimized saccharification conditions were achieved at a flow rate of 25 ml/min and with H$_{2}$SO$_{4}$ concentration at 1.0 %. Operation parameters were investigated including acid flow rate and acid concentration. The composition of rape straw is analyzed, and the material balance is studied in the optimized conditions. In addition to SEM, FT-IR analysis techniques are used, and the results show that the hemicellulose and cellulose in the rape straw can be fully converted to RS, while the change in lignin amount is negligible. This method is a novel and promising technique for high yield of RS, as it is accompanied with a low content of bio-inhibitor.
Starting Page	1392
Ending Page	1401
Page Count	10
File Format	PDF
ISSN	19391234
Journal	BioEnergy Research
Volume Number	7
Issue Number	4
e-ISSN	19391242
Language	English
Publisher	Springer US
Publisher Date	2014-05-21
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrothermal saccharification Rape straw Dilute sulfuric acid Reducing sugar Plant Sciences Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Ecology Wood Science & Technology
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment Agronomy and Crop Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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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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