We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Enhancement in the selectivity of O2/N2 via ZIF-8/CA mixed-matrix membranes and the development of a thermodynamic model to predict the permeability of gases.
- Authors
Azam, Shakir Ul; Hussain, Arshad; Farrukh, Sarah; Noor, Tayyaba; Liu, Yangxian
- Abstract
Zeolitic imidazolate framework-8 (ZIF-8) has a sodalite topology. ZIF-8 is composed of zinc ion coordinated by four imidazolate rings. The pore aperture of ZIF-8 is 3.4 Å, which readily retains large gas molecules like N2. In this work, mixed-matrix membranes (MMMs) have been fabricated by utilizing ZIF-8 and pristine cellulose acetate (CA) for O2/N2 separation. Membranes of pristine CA and MMMs of ZIF-8/CA at various ZIF-8 concentrations were prepared in tetrahydrofuran (THF). Permeation results of the fabricated membranes revealed increasing selectivity for O2/N2 with increasing pressure as well as ZIF-8/CA concentration up to 5% (w/w). The selectivity of O2/N2 increased 4 times for MMMs containing 5% (w/w) of ZIF-8/CA as compared with the pristine CA membrane. A thermodynamic model has also been developed to predict the permeability of gases through polymeric membranes. The results were compared with literature data as well as the pristine CA membrane produced in this work for model validation.
- Subjects
PERMEABILITY; POLYMERIC membranes; ZINC ions; GASES; CELLULOSE acetate; MODEL validation
- Publication
Environmental Science & Pollution Research, 2020, Vol 27, Issue 19, p24413
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-020-08778-1