High–Selective Separation Performance of CO2 from CH4 by Interfacial Engineering of Ultra-low-dose Bimetallic Pyrazine-MOF based Mixed Matrix Membranes

Carbon Capture Science & Technology

Muhammad Bilal Khan Niazi¹  Honghao Hou¹  Tayyaba Noor²  Zaib Jahan²  Hassan Raza Khan²  Sikander Rafiq² 

[1] Corresponding authors.;Department of Chemical Engineering, School of Chemical and Materials Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan;

关键词: Mixed matrix membrane (MMM);    CO2 separation;    Polysulfone (PSf);    Pyrazine-MOF;    Interfacial engineering;   

DOI  :  

来源: DOAJ

【 摘 要 】

The CO2 capturing is much more important not only in fuel upgrading but also for controlling global warming issues. Although much Metal-Organic Framework (MOF) based mixed matrix membranes (MMMs) exhibited great potential, the interfacial fine-tuning of inorganic MOF and organic membrane matrix was still a big obstacle. Herein, a novel bimetallic Pyrazine-functionalized MOF based polysulfone (PSf) mixed matrix membrane was prepared with adaptive interfaces via the interfacial plasticizer polyethylene glycol (PEG). The filler MOF greatly enhanced the CO2 capturing ability of pure PSf and PSf/PEG blend membranes. Structural characterizations revealed defect-free membranes. The mechanical test implied that by adding MOF in PSf, brittleness appeared and strength decreased from 2.84 to 2.26 MPa, but this strength increased up to 4.11 MPa by adding PEG. The interfacial-controlled PSf/PEG/Pyrazine-MOF membranes showed the highest CO2 permeability and solubility without loss of selectivity compared to regular MOF blended MMMs or PSf/PEG blend membranes. The permeability of CO2 significantly increased from 6.82 Barrer (for pure PSf membrane) to 17.13 Barrer (for PSf/PEG/Pyrazine-MOF membrane only adding 0.2% ultra-low-dose Pyrazine-MOF with 2% PEG). The study revealed a robust and efficient strategy to elevate gas separation performances of MMMs via the interfacial engineering.

【 授权许可】

Unknown