Gas separation with mixed matrix membranes obtained from MOF UiO-66-graphite oxide hybrids

Castarlenas, S. ; Téllez, C. (Universidad de Zaragoza) ; Coronas, J. (Universidad de Zaragoza)

Resumen: UiO-66-GO hybrids were obtained by hydrothermal synthesis of MOF UiO-66 (a Zr terephthalate) on graphite oxide (GO). These hybrids with appropriate texture and presence of nanosized MOF particles (in the ca. 30–100 nm range) have been used as fillers to prepare mixed matrix membranes (MMMs) with two different polymers, polysulfone (PSF) and polyimide (PI), as the matrixes, with contents varying between 0 and 32 wt%. The MMMs were applied to the separation of H2/CH4 and CO2/CH4 mixtures at different temperatures (35, 60 and 90 °C). Besides finding a good filler-polymer interaction, in the particular case of the hybrid filler, the barrier effect of the GO and the microporosity of the MOF dominated the separation properties of the MMMs. In all cases (different MMMs and separation mixtures) the effect of the temperature was to increase the permeability with a simultaneous decrease in the corresponding selectivity. In terms of permselectivity, the best H2/CH4 separation results were obtained (at 35 °C) with a PI based MMM containing only UiO-66 as filler (H2 permeability of 73 Barrer and H2/CH4 selectivity of 151), while a hybrid UiO-66-GO filler produced the best CO2/CH4 performance (CO2/CH4 selectivity value of 51 at 21 Barrer of CO2), also using a PI polymer.

Idioma: Inglés

DOI: 10.1016/j.memsci.2016.12.041

Año: 2017

Publicado en: JOURNAL OF MEMBRANE SCIENCE 526 (2017), 205-211
ISSN: 0376-7388

Factor impacto JCR: 6.578 (2017)

Categ. JCR: POLYMER SCIENCE rank: 3 / 87 = 0.034 (2017) - Q1 - T1
Categ. JCR: ENGINEERING, CHEMICAL rank: 9 / 137 = 0.066 (2017) - Q1 - T1

Factor impacto SCIMAGO: 2.4 - Biochemistry (Q1) - Physical and Theoretical Chemistry (Q1) - Materials Science (miscellaneous) (Q1) - Filtration and Separation (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/T05
Financiación: info:eu-repo/grantAgreement/ES/DGA-CAIXA/GA-LC-019-2011

Tipo y forma: Article (PostPrint)

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