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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/55982

    Título
    Effect of the type of gas-permeable membrane in ammonia recovery from air
    Autor
    Soto Herranz, MaríaAutoridad UVA
    Sánchez Báscones, MercedesAutoridad UVA Orcid
    Antolín Rodríguez, Juan ManuelAutoridad UVA Orcid
    Conde Cid, Diego
    Vanotti, Matias
    Año del Documento
    2019
    Editorial
    MDPI
    Descripción
    Producción Científica
    Documento Fuente
    Environments, 2019, vol. 6, n. 6, 70
    Resumen
    Animal production is one of the largest contributors to ammonia emissions. A project, “Ammonia Trapping”, was designed to recover gaseous ammonia from animal barns in Spain. Laboratory experiments were conducted to select a type of membrane most suitable for gaseous ammonia trapping. Three types of gas-permeable membranes (GPM), all made of expanded polytetrafluoroethylene (ePTFE), but with different diameter (3.0 to 8.6 mm), polymer density (0.45 to 1.09), air permeability (2 to 40 L·min−1·cm2), and porosity (5.6 to 21.8%) were evaluated for their effectiveness to recover gas phase ammonia. The ammonia evolved from a synthetic solution (NH4Cl + NaHCO3 + allylthiourea), and an acidic solution (1 N H2SO4) was used as the ammonia trapping solution. Replicated tests were performed simultaneously during a period of 7 days with a constant flow of acidic solution circulating through the lumen of the tubular membrane. The ammonia recovery yields were higher with the use of membranes of greater diameter and corresponding surface area, but they were not affected by the large differences in material density, porosity, air permeability, and wall thickness in the range evaluated. A higher fluid velocity of the acidic solution significantly increased—approximately 3 times—the mass NH3–N recovered per unit of membrane surface area and time (N-flux), from 1.7 to 5.8 mg N·cm−2·d−1. Therefore, to optimize the effectiveness of GPM system to capture gaseous ammonia, the appropriate velocity of the circulating acidic solution should be an important design consideration.
    Palabras Clave
    Ammonia
    Amoniaco
    Air pollution
    Aire - Contaminación
    ISSN
    2076-3298
    Revisión por pares
    SI
    DOI
    10.3390/environments6060070
    Patrocinador
    Unión Europea (project LIFE15-ENV/ES/000284)
    Version del Editor
    https://www.mdpi.com/2076-3298/6/6/70
    Propietario de los Derechos
    © 2019 The Authors
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/55982
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
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    • DEP08 - Artículos de revista [82]
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    Universidad de Valladolid

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