A new zeolitic hydroxymethylimidazolate material and its use in mixed matrix membranes based on 6FDA-DAM for gas separation

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Title: A new zeolitic hydroxymethylimidazolate material and its use in mixed matrix membranes based on 6FDA-DAM for gas separation
Authors: Perea-Cachero, Adelaida | Sánchez-Laínez, Javier | Berenguer-Murcia, Ángel | Cazorla-Amorós, Diego | Téllez, Carlos | Coronas, Joaquín
Research Group/s: Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: MOF | ZIF | Copolyimide 6FDA-DAM | Mixed matrix membrane | Gas separation
Knowledge Area: Química Inorgánica
Issue Date: 15-Dec-2017
Publisher: Elsevier
Citation: Journal of Membrane Science. 2017, 544: 88-97. doi:10.1016/j.memsci.2017.09.009
Abstract: The new ZIF named UZAR-S13 is formed by Zn2+ and 4(5)-(hydroxymethyl)imidazolate. UZAR-S13 has two distinct phases according to SEM and XRD: amorphous spheres and sheet crystals. UZAR-S13 and byproducts, with no N2 adsorption, rendered a notable CO2 uptake (up to 3.8 mmol g−1 at 30 bar and 0 °C), approaching values of known ZIFs. The most promising materials were included as fillers in mixed matrix membranes based on copolyimide 6FDA-DAM to study the separation of CO2/CH4, CO2/N2, H2/CO2 and H2/CH4 mixtures. The pore blocking hindered the gas flow of bulky molecules (CH4, N2 and CO2). The high CO2 adsorption on sheet crystals also contributed to the decrease in the permeability of CH4, N2 and CO2, giving poor selectivities. In contrast, the MMMs improved both the H2/CH4 selectivity (8.9–12.7 vs. 7.2) and permeability of H2 (544–597 vs. 505 Barrer) of the bare 6FDA-DAM membrane. This emphasizes the potential application of the fillers in the separation by molecular sieving of gas mixtures without CO2.
Sponsor: Financial support from the Spanish Ministry of Economy and Competitiveness (MINECO) and FEDER (MAT2013-40556-R, MAT2016-77290-R (MINECO/FEDER) and CTQ2015-66080-R (MINECO/FEDER)), the European Social Fund (ESF) and the Aragón Government (DGA, T05) is gratefully acknowledged. A. P.-C. and J. S.-L. also thank the DGA and Spanish Education Ministry Program FPU2014, respectively, for Ph.D. grants.
URI: http://hdl.handle.net/10045/70020
ISSN: 0376-7388 (Print) | 1873-3123 (Online)
DOI: 10.1016/j.memsci.2017.09.009
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2017 Elsevier B.V.
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.memsci.2017.09.009
Appears in Collections:INV - MCMA - Artículos de Revistas

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