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    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/23486

    Título
    How structure and composition of raw material influence hemicellulose extraction during hot pressurized water pretreatments
    Autor
    Gallina, GianlucaAutoridad UVA
    García Serna, JuanAutoridad UVA Orcid
    Biasi, Pierdomenico
    Grénman, Henrik
    Salmi, Tapio
    Congreso
    13th International Conference on Renewable Resources and Biorefineries (RRB-13)
    Año del Documento
    2017
    Abstract
    In literature, there are several examples of studies concerning the extraction of hemicellulose with pressurized hot water from lignocellulosic materials, however there is not any detailed investigation, which compares the extraction efficiency from different species, analyzing the characteristics of the extracted hemicelluloses. The main hypothesis that we wanted to test is weather there exists a clear relationship between biomass structure, e.g. determined via TGA model analysis, and the quality of the hemicellulose extracted. Fractionation of the wood from 10 different tree species was carried out in a batchwise operated cascade reactor, where mass transfer effects are negligible, at a constant temperature of 160ºC. The concentration of hemicellulose extracted from the species was analyzed at 5 different extraction times by calculating and comparing the yields of the extractions. The molecular weights of the oligomers obtained during various extraction times were measured and a direct correlation with the pH of the extracted solution was identified. The content of lignin and cellulose in the various species was also determined, to understand if the composition has an influence on the extraction process.
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/23486
    Derechos
    openAccess
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    • IPP - Comunicaciones a congresos, conferencias, etc. [27]
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    Attribution-NonCommercial-NoDerivatives 4.0 InternationalLa licencia del ítem se describe como Attribution-NonCommercial-NoDerivatives 4.0 International

    Universidad de Valladolid

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