Search for optimum conditions of wheat straw hemicelluloses cold alkaline extraction process
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Publication Date
2013 -
Publisher
Elsevier -
Citation
García Domínguez, J.C., Díaz Blanco, M.J., García Domínguez, M.T., Feria Infante, M.J., Gómez Lozano, D.M.:"Search for optimum conditions of wheat straw hemicelluloses cold alkaline extraction process". Biochemical Engineering Journal. Vol. 71, págs. 127-133, (2013). ISSN 1369-703X -
Abstract
A method for the selective extraction of hemicellulose from wheat straw involving cold alkaline extraction and subsequent separation by precipitation with ethanol is proposed. Wheat straw affords selective separation of the hemicellulose fraction from the cellulose and lignin fractions with the proposed method. The hemicellulose yield was optimized by using a 2n factor design to examine the influence of temperatures (temperature was designed between 20 and 40 ◦C), operation times (operation time was designed between 30 and 60 min) and alkali concentrations (alkali concentration was designed between 80 and 120 g L−1). These conditions allowed 56.1% of all hemicellulose initially present in the raw material, and 59.1% of the lignin, to be extracted. Subsequent separation of hemicellulose in the liquid phase from the cold alkaline extraction by precipitation with ethanol provided a fraction containing 39.4% of all hemicellulose (45.2% hemicellulose in extract/total extract) and only 12% of all lignin in the raw material. -
Project
info:eu-repo/grantAgreement/CDTI [CENIT-E-CDTI-BioSos-CEN-2009-1040]
info:eu-repo/grantAgreement/CICYT-FEDER (Science and Technology Inter Ministerial Commission, Spanish Government - European Regional Development Fund) [AGL2009-13113]
Fichero | Tamaño | Formato |
| Description |
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Search for Optimum.pdf | 458.8Kb | View/ | versión pre-print |
Fichero | Tamaño | Formato |
| Description |
---|---|---|---|---|
Search for Optimum.pdf | 458.8Kb | View/ | versión pre-print |