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Título: | Enhancing liquid hot water (LHW) pretreatment of sugarcane bagasseby high pressure carbon dioxide (HP-CO2). |
Autor(es): | Gurgel, Leandro Vinícius Alves Pimenta, Maria Teresa Borges Curvelo, Antonio Aprigio da Silva |
Palavras-chave: | Hemicelluloses extraction Sugarcane bagasse Pretreatment Enzymatic hydrolysisa |
Data do documento: | 2014 |
Referência: | GURGEL, L. V. A.; PIMENTA, M. T. B.; CURVELO, A. A. da S. Enhancing liquid hot water (LHW) pretreatment of sugarcane bagasseby high pressure carbon dioxide (HP-CO2). Industrial Crops and Products, v. 57, p. 141-149, 2014. Disponível em: <http://www.sciencedirect.com/science/article/pii/S092666901400168X>. Acesso em: 02 fev. 2015. |
Resumo: | Liquid hot water (LHW) pretreatment associated with high pressure carbon dioxide (HP-CO2) was eval-uated as a potential green pretreatment technology for extraction of hemicelluloses from depithedsugarcane bagasse to produce fermentable sugars. Developing a technology based on the use of lowcost, non-corrosive, and recoverable chemicals as CO2can result in a more efficient and economic pro-cess. In this study, depithed sugarcane bagasse was treated with LHW and HP-CO2at milder temperaturesin comparison with LHW pretreatment alone. To assess the effects of varying pretreatment operationalconditions on extraction of xylo-oligosaccharides and xylose release with cellulose preservation a centralcomposite design (CCD) of experiments was used. The pretreatments were carried out at temperaturesranging from 93.8◦C (8.62 MPa) to 136.2◦C (12.96 MPa) and times from 17.6 to 102.4 min with a liquid-to-solid ratio of 12:1. The maximum xylan and xylose concentrations were achieved by treating depithedbagasse at 100◦C for 30 min and 115◦C for 60 min, respectively. At these conditions the amount of xylanequivalent ranged 10–12 g/L. At 115◦C for 60 min, the cellulose preservation achieved 97.2%. The obtainedresults showed that HP-CO2proved to be an efficient hydrolysis agent. Samples of LHW-HP-CO2pre-treated bagasse were tested for enzymatic digestibility. Depithed bagasse pretreated at 115◦C for 60 minafter enzymatic hydrolysis had a glucose yield of 30.43 g/L and a cellulose conversion of 41.17%. |
URI: | http://www.repositorio.ufop.br/handle/123456789/5125 |
DOI: | https://doi.org/10.1016/j.indcrop.2014.03.034 |
ISSN: | 0926-6690 |
Licença: | O periódico Industrial Crops and Products concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3581981489176. |
Aparece nas coleções: | DEQUI - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_EnhacingLiquidHot.pdf | 1,21 MB | Adobe PDF | Visualizar/Abrir |
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