Increased Selectivity in CO2/CH4 Separation with Mixed‐Matrix Membranes of Polysulfone and Mixed‐MOFs MIL‐101(Cr) and ZIF‐8. Issue 27 (15th June 2016)

• Record Type: Journal Article
• Authors: Tanh Jeazet, Harold B.; Sorribas, Sara; Román‐Marín, José M.; Zornoza, Beatriz; Téllez, Carlos; Coronas, Joaquín; Janiak, Christoph
• Other Names: Dietzel Pascal D. C. guestEditor.; Kitagawa Hiroshi guestEditor.
• Is Part Of: European journal of inorganic chemistry. Issue 27(2016)
• Page Start: 4363
• Page End: 4367
• Publication Date: 2016-06-15
• Subjects: Metal‐organic frameworks -- Mixed‐matrix membranes -- Microporous materials -- Polysulfones -- Gas separation -- Carbon dioxide -- Methane; Chemistry, Inorganic -- Periodicals; Organometallic chemistry -- Periodicals; Bioinorganic chemistry -- Periodicals; Solid state chemistry -- Periodicals; 546
• DOI: 10.1002/ejic.201600190
• Languages: English
• ISSNs: 1434-1948

Abstract

Abstract : Combination of two hydrothermally stable MOFs MIL‐101(Cr) and ZIF‐8 in a 1:1 ratio in a polysulfone (PSF) mixed‐matrix membrane (MMM) showed a significant higher selectivity in mixed‐gas CO2 /CH4 permeation tests for 16 wt.‐% MIL‐101(Cr)/ZIF‐8 compared to analogous single‐filler MMMs [MIL‐101(Cr) or ZIF‐8] or to the also tested combination NH2 ‐MIL‐53(Al)/ZIF‐8 (1:1 ratio). The CO2 /CH4 selectivity increased significantly from 23 to 40 from pure PSF to the 16 wt.‐% MIL‐101(Cr)/ZIF‐8 membrane. Separation of CO2 /CH4 is relevant for purification ("sweetening") of natural gas (CH4 as main component) which is soured with up to over 40 % CO2 and N2 and only useable at low CO2 concentrations. Abstract : Combination of two different MOFs [MIL‐101(Cr) and ZIF‐8] in the same MMM produces synergy effects with significant increase of CO2 /CH4 selectivity compared to analogous MMMs with only one filler type.