Novel MMM using COinf2/inf selective SSZ-16 and high-performance 6FDA-polyimide for COinf2/inf/CHinf4/inf separation

0533056 - ÚFCH JH 2022 RIV GB eng J - Článek v odborném periodiku
Ahmad, M. Z. - Martin-Gil, V. - Supiňková, Taťána - Lambert, P. - Castro-Muñoz, R. - Hrabánek, Pavel - Kočiřík, Milan - Fíla, Vlastimil
Novel MMM using COinf2/inf selective SSZ-16 and high-performance 6FDA-polyimide for COinf2/inf/CHinf4/inf separation.
Separation and Purification Technology. Roč. 254, JAN 2021 (2021), č. článku 117582. ISSN 1383-5866. E-ISSN 1873-3794
Grant CEP: GA MŠMT(CZ) EF16_026/0008413
Institucionální podpora: RVO:61388955 ; RVO:67985858
Klíčová slova: 6FDA-polyimide * CO /CH separation 2 4 * Mixed matrix membrane * ssz-16 * Zeolite
Obor OECD: Physical chemistry; Chemical process engineering (UCHP-M)
Impakt faktor: 9.136, rok: 2021
Způsob publikování: Omezený přístup

The development, characterization, and CO2/CH4 separation properties of a new mixed matrix membrane (MMM), comprises of 6FDA-DAM:DABA and small pore zeolite SSZ-16 were investigated. The MMMs were prepared with different zeolite loadings to study the filler content effects on the membrane physical and gas transport properties. Consequently, their gas separation performances were investigated at several transmembrane pressures (2, 4, 6 and 8 bar) using different binary feed gas compositions (25/75, 50/50, 75/25 vol.% of CO2/CH4) at 25 °C. Besides improving the membrane physical properties, SSZ-16 addition is proven to enhance the gas separation performance effectively. The MMM with 5 wt.% SSZ-16 presents an excellent filler dispersion and increased CO2 permeability by almost 2-fold while maintaining its high CO2/CH4 selectivity, with respect to the unfilled membrane (PCO2 = 199.4 Barrer, αCO2/CH4 = 35.9). Higher filler loadings show slightly lower permeability, indicating a possible polymer rigidification in the filler-polymer region. Most importantly, MMM with the highest loading presents selectivity drop by ~50% due to defective polymer-filler interfaces, which directly increased the CH4 permeability, concluding SSZ-16 addition is able to achieve the ideal MMM improvement only at low loadings. All the findings concerning different feed composition and transmembrane pressures are presented and discussed accordingly.
Trvalý link: http://hdl.handle.net/11104/0311555