• español
  • English
  • français
  • Deutsch
  • português (Brasil)
  • italiano
    • español
    • English
    • français
    • Deutsch
    • português (Brasil)
    • italiano
    • español
    • English
    • français
    • Deutsch
    • português (Brasil)
    • italiano
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Listar

    Todo UVaDOCComunidadesPor fecha de publicaciónAutoresMateriasTítulos

    Mi cuenta

    Acceder

    Estadísticas

    Ver Estadísticas de uso

    Compartir

    Ver ítem 
    •   UVaDOC Principal
    • PRODUCCIÓN CIENTÍFICA
    • Grupos de Investigación
    • Ingeniería de Procesos a Presión
    • IPP - Artículos de revista
    • Ver ítem
    •   UVaDOC Principal
    • PRODUCCIÓN CIENTÍFICA
    • Grupos de Investigación
    • Ingeniería de Procesos a Presión
    • IPP - Artículos de revista
    • Ver ítem
    • español
    • English
    • français
    • Deutsch
    • português (Brasil)
    • italiano

    Exportar

    RISMendeleyRefworksZotero
    • edm
    • marc
    • xoai
    • qdc
    • ore
    • ese
    • dim
    • uketd_dc
    • oai_dc
    • etdms
    • rdf
    • mods
    • mets
    • didl
    • premis

    Citas

    Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/31390

    Título
    Redefining conventional biomass hydrolysis models by including mass transfer effects. Kinetic model of cellulose hydrolysis in supercritical water
    Autor
    Vaquerizo Martín, LuisAutoridad UVA Orcid
    Abad Fernández, NereaAutoridad UVA
    Mato Chaín, Rafael BartoloméAutoridad UVA Orcid
    Cocero Alonso, María JoséAutoridad UVA Orcid
    Año del Documento
    2018
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Chemical Engineering Journal 350, 2018, 463-473
    Resumen
    Conventional kinetic models of cellulose hydrolysis in supercritical water do not accurately represent the operation with concentrated suspensions since they neglect the mass transfer effects. This work proposes a kinetic model which is able to reproduce cellulose hydrolysis at high concentrations providing the opt imum reaction conditions to obtain nanocellulose particles and oligomers of controlled size. The basic idea of the model, which is applicable to other lignocellulosic materials, is that the hydrolysis of the cellulose particles generates an oligosaccharides layer which creates a mass transfer resistance. Therefore, it considers both the diffusion of the water molecules from the bulk phase to the surfaces of the cellulose particles and the superficial hydrolysis kinetics. Experimental points were obtained working with two different cellulose types (Dp=75 μm and Dp=50 μm) at 390 °C and 25 MPa, residence times between 50 ms and 250 ms and initial cellulose suspension concentration from 3% to 7% w/w (1% to 2.3% w/w at the inlet of the reactor). The average deviation between the experimental points and the theoretical values is lower than 10% proving the applicability of the kinetic model. The experimental and theoretical results demonstrated that increasing the total number of cellulose particles, either increasing the initial concentration or decreasing the average particle diameter, reduces the hydrolysis rate.
    Palabras Clave
    Mass transfer
    Shrinking Core Model
    particle surface
    oligosaccharides layer
    covering conversion
    ISSN
    1385-8947
    Revisión por pares
    SI
    DOI
    10.1016/j.cej.2018.05.077
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S138589471830891X
    Idioma
    eng
    URI
    http://uvadoc.uva.es/handle/10324/31390
    Derechos
    openAccess
    Aparece en las colecciones
    • BioEcoUVa - Artículos de revista [195]
    • IPP - Artículos de revista [32]
    Mostrar el registro completo del ítem
    Ficheros en el ítem
    Nombre:
    Artículo_Modelo_Celulosa.pdf
    Tamaño:
    555.5Kb
    Formato:
    Adobe PDF
    Thumbnail
    Visualizar/Abrir
    Attribution 4.0 InternationalLa licencia del ítem se describe como Attribution 4.0 International

    Universidad de Valladolid

    Powered by MIT's. DSpace software, Version 5.10