Skip navigation
Por favor, use este identificador para citar o enlazar este ítem: http://uvadoc.uva.es/handle/10324/21902
Título: Helium Recovery by Membrane Gas Separation Using Poly(o‑acyloxyamide)s
Autor: Díez, Blanca
Cuadrado Curto, Purificación
Marcos Fernández, Ángel
Prádanos del Pico, Pedro
Tena, Alberto
Palacio Martínez, Laura
Lozano, Ángel E.
Hernández Giménez, Antonio
Año del Documento: 2014
Editorial: Elsevier
Descripción: Producción Científica
Documento Fuente: Industrial and Engineering Chemistry Research , 2014, 53 (32), pp 12809–12818
Resumen: Poly(o-acyloxyamide)s (PORAs) derived from a poly(o-hydroxyamide) from 2,2′-bis(3-amino-4-hydroxyphenyl)- hexafluoropropane (APAF) diamine, APAF−POHA, have been synthesized and evaluated as gas separation materials. PORAs were synthesized from poly(o-hydroxyamide)s by derivatization of the free OH group with an aliphatic acid dichloride or dianhydride that allowed the introduction of acetyl or pivaloyl groups on their structure. All of them showed low−medium thermal stability due to a degradation of the amide moieties, and most of them (those synthesized from isophthaloyl dichloride (IPC), 2,2′-bis(4-carboxyphenyl) hexafluoropropane dichloride (6FC), and 4,4′-dicarboxydiphenylsulfone dichloride (DPSC)) showed good mechanical properties. The poly(o-acyloxyamide)s synthesized have shown good permselectivities for He/N2 and He/CH4 separations and very good permeability−selectivity balance for He/CO2 separation. The acetyl PORAs showed better permeability versus selectivity balances than the pivaloyl ones. Moreover, selectivity increased while permeability decreased in the sequence 6F-APAF > IP-APAF > DPS-APAF. Intersegmental distances, d-spacing, were shown to decrease along this sequence, obtaining a nice correlation between permeability and d-spacing. For the He/N2 and the He/CH4 pairs of gases, the best permeability−selectivity values are obtained for 6F-APAF-Ac with a He permeability of 33 barrer and selectivities of 84 and 106, respectively. DPS-APAF-Ac gives a He permeability of 13 barrer and a selectivity of 21 for the He/CO2 separation.
Materias (normalizadas): Helium Recovery
Membrane Gas Separation
ISSN: 0014-3057
Revisión por Pares: SI
DOI: 10.1021/ie501649b
Patrocinador: Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. VA302U13)
Version del Editor: https://www.journals.elsevier.com/european-polymer-journal/
Idioma: eng
URI: http://uvadoc.uva.es/handle/10324/21902
Derechos: info:eu-repo/semantics/openAccess
Aparece en las colecciones:DEP31 - Artículos de revista

Ficheros en este ítem:
Fichero Descripción TamañoFormato 
PREV-07-IECR-53-12809-12818-2014.pdf886,12 kBAdobe PDFThumbnail
Visualizar/Abrir


Este ítem está sujeto a una licencia Creative Commons Licencia Creative Commons Creative Commons

Comentarios
Universidad de Valladolid
Powered by MIT's. DSpace software, Version 5.5