Enhanced CO2/CH4 selectivity and mechanical strength of mixed-matrix membrane incorporated with NiDOBDC/GO composite

• Main Authors: Li, Wen, Chuah, Chong Yang, Nie, Lina, Bae, Tae-Hyun
• Other Authors: School of Chemical and Biomedical Engineering
• Format: Article
• Language: English
• Published: 2021
• Subjects: Engineering::Chemical engineering; Mixed-matrix Membrane; Graphene Oxide
• Online Access: https://hdl.handle.net/10356/150175
• Institution: Nanyang Technological University

A three-dimensional NiDOBDC/GO composite with an optimized accessible surface area was successfully synthesized and incorporated into a polyimide membrane to improve CO2/CH4 separation performance while keeping good mechanical strength. A significant increase in CO2/CH4 selectivity (59%) was observed for the case of 20% NiDOBDC/GO composite in Matrimid® membrane, without sacrificing CO2 permeability. Furthermore, the incorporation of the NiDOBDC/GO composite in a polymeric membrane was found to improve the overall mechanical strength of resulting mixed-matrix membranes. Therefore, the addition of the nanocomposites as fillers in polymeric membranes is proposed as a promising strategy to realize major improvements in CO2/CH4 separation.