ZIF‐11/Matrimid® mixed matrix membranes for efficient CO₂, CH₄, and H₂ separations

Abstract

Zeolitic imidazolate framework ZIF‐11 particles were prepared and mixed with Matrimid® 5218 polyimide, from 0 to 40 wt. % loadings. The ZIF‐11 particles and the Matrimid® 5218 polyimide matrix were studied using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), X‐Ray diffraction (XRD), infrared spectroscopy (FT‐IR), and scanning electron microscopy (SEM) techniques. Surface and cross‐sectional scanning electron microscopy images of the mixed matrix membranes (MMMs) were taken to examine the dispersion of particles in the polymer matrix. No visible agglomeration between ZIF‐11 particles and the polymer matrix was spotted, even at 40 wt. % ZIF‐11 loading. Mixed matrix membranes were described by the measured permeabilities of H2, CO2 and CH4 gases. Ideal gas selectivities were determined. Permeability of all gases increased with increasing ZIF‐11 percentages. The permeabilities for all gases decreased at 40 wt. % loading, and the CO2/CH4, and H2/CH4 selectivities were increased. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.

Postsynthetic Modification of Zn/Co-ZIF by 3,5-Diamino-1,2,4-triazole for Improved MOF/Polyimide Interface in CO2–Selective Mixed Matrix Membranes

“…Comparison of CO 2 /CH 4 separation performances with the 1991 and 2008 Robeson upper bounds. All data points show different MOF-based MMM with 6FDA-ODA or Matrimid polyimide (*taken from refs − , − and , − , respectively) as the polymeric phase tested at P = 1–10 bar and T = 25–35 °C (1 Barrer = 1 × 10 –10 cm 3 (STP) cm/cm 2 s cmHg).…”

Zeolitik-İmidazolat İskelet Yapılarının Adsorpsiyon ve Difüzyon-bazlı Soy-gaz Karışımı Ayırma Potansiyellerinin Hesapsal Yöntemlerle İncelenmesi

“…In terms of adsorption and membrane based separation of gas mixtures, ZIFs are mainly considered for separation of several gas mixtures, e.g., CO2/CH4, CO2/CO, CO2 /H2, CH4 /H2, and CO2/N2 [5][6][7][8][9]. Although, their exceptionally high performance of gas separation and purification has been especially validated for CO2 , CH4 , and H2 gas mixtures by many experimental and theoretical works [10,13], we know very little about potential of the ZIFs for separation of noble gas mixtures, such as Xe/Ar and Xe/Kr.…”