2024-03-29T09:21:13Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/219022021-06-23T10:14:55Zcom_10324_1157com_10324_931com_10324_894col_10324_1298
Helium Recovery by Membrane Gas Separation Using Poly(o‑acyloxyamide)s
Díez, Blanca
Cuadrado Curto, Purificación
Marcos Fernández, Ángel
Prádanos del Pico, Pedro Lourdes
Tena Matías, Alberto
Palacio Martínez, Laura
Lozano, Ángel E.
Hernández Giménez, Antonio
Helium Recovery
Membrane Gas Separation
Producción Científica
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.
Junta de Castilla y León (programa de apoyo a proyectos de investigación – Ref. VA302U13)
2016-12-22T09:00:59Z
2016-12-22T09:00:59Z
2014
info:eu-repo/semantics/article
Industrial and Engineering Chemistry Research , 2014, 53 (32), pp 12809–12818
0014-3057
http://uvadoc.uva.es/handle/10324/21902
10.1021/ie501649b
eng
https://www.journals.elsevier.com/european-polymer-journal/
Attribution-NonCommercial-NoDerivatives 4.0 International
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/4.0/
application/pdf
Elsevier
https://uvadoc.uva.es/bitstream/10324/21902/6/PREV-07-IECR-53-12809-12818-2014.pdf.jpg
Hispana
TEXT
http://creativecommons.org/licenses/by-nc-nd/4.0/
UVaDOC. Repositorio Documental de la Universidad de Valladolid
http://uvadoc.uva.es/handle/10324/21902