Influencia de la carga de sólido en la producción de D-xilosa mediante hidrólisis del hueso de aceituna con ácido sulfúrico diluido
| Autor: | Marwa Saleh, Manuel Cuevas, S. Sánchez, J. F. García-Martín |
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| Rok vydání: | 2015 |
| Předmět: |
Olive stones
Hueso de aceituna dilute acid hydrolysis lcsh:TX341-641 Xylose Hemicelulosa D-xilosa Superficie de respuesta response surface methodology chemistry.chemical_compound Hydrolysis D-xylose Response surface methodology Nitric acid TX341-641 Hemicellulose Hidrólisis ácida diluida Chromatography Nutrition. Foods and food supply Organic Chemistry Extraction (chemistry) d-xylose hemicellulose olive stones chemistry Distilled water Yield (chemistry) Acid hydrolysis Dilute acid hydrolysis lcsh:Nutrition. Foods and food supply Food Science |
| Zdroj: | Grasas y Aceites; Vol. 66 No. 3 (2015); e084 Grasas y Aceites; Vol. 66 Núm. 3 (2015); e084 Grasas y Aceites Consejo Superior de Investigaciones Científicas (CSIC) Digital.CSIC. Repositorio Institucional del CSIC instname Grasas y Aceites, Vol 66, Iss 3, Pp e084-e084 (2015) Grasas y Aceites, Vol 66, Iss 3, p e084 (2015) |
| ISSN: | 1988-4214 0017-3495 |
| DOI: | 10.3989/gya.2015.v66.i3 |
| Popis: | © 2015 CSIC. The selective hydrolysis of hemicellulose from olive stones was attempted in order to achieve a maximum D-xylose yield. For this aim, batch hydrolysis was conducted under different operating conditions of temperature, acid concentration and solid loading. Firstly, distilled water, sulphuric acid and nitric acid were assessed as hydrolytic agents at different temperatures (200, 205, 210 and 220 °C) and at a fixed acid concentration (0.025 M). Sulphuric acid and 200 °C were selected for the subsequent dilute acid hydrolysis optimization based on the obtained D-xylose yields. The combined influence of solid loading (from 29.3 to 170.7 g olive stones into 300 mL acid solution) and sulphuric acid concentration (0.006-0.034 M) on the release of D-xylose was then estimated by response surface methodology. According to a statistical analysis, both parameters had significant interaction effects on D-xylose production. The results illustrated that the higher the solid loading, the higher the required acid concentration. The decrease in the solid/liquid ratio in the reactor had a positive effect on D-xylose extraction and on the amount of acid used. The optimum solid loading and sulphuric acid concentration were determined to be 50 g (solid/liquid ratio 1/6) and 0.016 M, respectively. Under these conditions, the predicted D-xylose yield (expressed as g of sugar per 100 g of dry matter fed) was 20.4 (87.2% of maximum attainable). This work was funded by the Projects 01272/2005 and AGR/6509 (Andalusia Regional Government, Spain). The authors would like to acknowledge ‘S.C.A. San Juan’ (Jaén, Spain) for the supply of olive stones. Marwa Saleh also acknowledges a grant from the AECI (Spain) |
| Databáze: | OpenAIRE |
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