TY - JOUR
T1 - In-situ growth of zeolitic imidazolate framework-67 nanoparticles on polysulfone/graphene oxide hollow fiber membranes enhance CO2/CH4 separation
AU - Sainath, Krishnamurthy
AU - Modi, Akshay
AU - Bellare, Jayesh
N1 - Funding Information:
The authors are thankful to the Wadhwani Research Centre for Bioengineering and Tata Centre for Technology and Design (both at IIT Bombay, India) for the research grant. The authors also acknowledge the SAIF, and the Central Facility (C/o IRCC), IIT Bombay, India, for providing various facilities required for this study. KS thanks the management of B. M. S. College of Engineering, Bengaluru, India for deputing KS for pursuing PhD at IIT Bombay, India.
Funding Information:
The authors are thankful to the Wadhwani Research Centre for Bioengineering and Tata Centre for Technology and Design (both at IIT Bombay, India) for the research grant. The authors also acknowledge the SAIF, and the Central Facility (C/o IRCC), IIT Bombay, India , for providing various facilities required for this study. KS thanks the management of B. M. S. College of Engineering, Bengaluru, India for deputing KS for pursuing PhD at IIT Bombay, India.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/11/15
Y1 - 2020/11/15
N2 - Zeolitic imidazolate frameworks (ZIFs) are attracting membrane-based gas separation researchers because of their exceptional and tunable physicochemical properties. In this study, a novel approach has been demonstrated to modify hollow fiber membranes (HFMs) by in-situ growth of ZIF-67 nanoparticles on the lumen side of polysulfone/graphene oxide (Psf/GO) HFMs. The formation of ZIF-67 nanoparticles on the HFMs was confirmed by different spectroscopy and microscopy techniques. The gas separation performance was measured by conducting experiments with pure gas and an equimolar mixture of CO2 and CH4, at 25 °C and 1–5 bar pressure. In the single gas permeation studies, ZIF-67 coated HFMs showed CO2/CH4 selectivity of 22.38 ± 0.30, which was almost 3.4 times the selectivity of the pristine HFMs. Furthermore, for equimolar CO2/CH4 mixture, though a slight decrease in CO2 permeance was measured, ZIF-67 coated HFMs exhibited CO2/CH4 selectivity of 44.94 ± 3.00, which was 3.3 times the selectivity of the uncoated HFMs. Interestingly, ZIF-67 coated HFMs maintained their gas separation performance over a long duration. Thus, the novel in-situ grown ZIF-67 on Psf/GO HFMs showed improved CO2/CH4 separation performance, making these modified membranes potentially useful for the practical gas separation applications.
AB - Zeolitic imidazolate frameworks (ZIFs) are attracting membrane-based gas separation researchers because of their exceptional and tunable physicochemical properties. In this study, a novel approach has been demonstrated to modify hollow fiber membranes (HFMs) by in-situ growth of ZIF-67 nanoparticles on the lumen side of polysulfone/graphene oxide (Psf/GO) HFMs. The formation of ZIF-67 nanoparticles on the HFMs was confirmed by different spectroscopy and microscopy techniques. The gas separation performance was measured by conducting experiments with pure gas and an equimolar mixture of CO2 and CH4, at 25 °C and 1–5 bar pressure. In the single gas permeation studies, ZIF-67 coated HFMs showed CO2/CH4 selectivity of 22.38 ± 0.30, which was almost 3.4 times the selectivity of the pristine HFMs. Furthermore, for equimolar CO2/CH4 mixture, though a slight decrease in CO2 permeance was measured, ZIF-67 coated HFMs exhibited CO2/CH4 selectivity of 44.94 ± 3.00, which was 3.3 times the selectivity of the uncoated HFMs. Interestingly, ZIF-67 coated HFMs maintained their gas separation performance over a long duration. Thus, the novel in-situ grown ZIF-67 on Psf/GO HFMs showed improved CO2/CH4 separation performance, making these modified membranes potentially useful for the practical gas separation applications.
KW - CO/CH mixed gas separation
KW - Hollow fiber membranes
KW - In-situ nanoparticles growth
KW - Long-term performance stability
KW - Zeolitic imidazolate framework-67
UR - http://www.scopus.com/inward/record.url?scp=85089159884&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2020.118506
DO - 10.1016/j.memsci.2020.118506
M3 - Article
AN - SCOPUS:85089159884
VL - 614
JO - Journal of Membrane Science
JF - Journal of Membrane Science
SN - 0376-7388
M1 - 118506
ER -