On the chemical filler-polymer interaction of nano- and micro-sized ZIF-11 in PBI mixed matrix membranes and their application for H2/CO2 separation

Sánchez-Laínez, J. (Universidad de Zaragoza) ; Zornoza, B. ; Téllez, C. (Universidad de Zaragoza) ; Coronas, J. (Universidad de Zaragoza)

Resumen: The evolution of nano- and micro-sized ZIF-11 (nZIF-11 and ZIF-11, respectively) when embedded into a PBI polymeric matrix is studied. The prepared membranes, with loadings up to 55 wt%, have been characterized through several techniques (XRD, SEM, FTIR, TGA, 13C NMR and XPS) and the changes in the morphology of the fillers upon combination with PBI, as well as in the chemical environment of their main atoms (interactions between the linker of the filler and the benzyl rings of the polymeric bIm units) are discussed. All the membranes have been tested at temperatures ranging between 70 and 200 °C to study their H2/CO2 separation performance. The integration of both types of MOF in the polymeric phase improves not only the hydrogen permeability but also the selectivity in comparison with the pure polymer in all cases. H2 permeability increases due to a better diffusion of the penetrants, while CO2 adsorption on the MOF and solution in the polymer decreases. The best result obtained corresponds to the membrane with 55 wt% loading of ZIF-11, with 495 Barrer of H2 permeability and a H2/CO2 selectivity of 7.0.

Idioma: Inglés

DOI: 10.1039/c6ta06438h

Año: 2016

Publicado en: Journal of Materials Chemistry A 4, 37 (2016), 14334-14341
ISSN: 2050-7488

Factor impacto JCR: 8.867 (2016)

Categ. JCR: CHEMISTRY, PHYSICAL rank: 15 / 144 = 0.104 (2016) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 19 / 273 = 0.07 (2016) - Q1 - T1
Categ. JCR: ENERGY & FUELS rank: 4 / 89 = 0.045 (2016) - Q1 - T1

Factor impacto SCIMAGO: 3.075 - Chemistry (miscellaneous) (Q1) - Renewable Energy, Sustainability and the Environment (Q1) - Materials Science (miscellaneous) (Q1)

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)