Logo image
Back
Graphene Oxide/Melamine/Ionic liquid membranes for selective CO2 separation
Journal article   Open access   Peer reviewed

Graphene Oxide/Melamine/Ionic liquid membranes for selective CO2 separation

Ahmad Arabi Shamsabadi, Vahid Rad and Masoud Soroush
Nano Trends, v 6, 100033
01 Jun 2024
DOI: https://doi.org/10.1016/j.nwnano.2024.100033
url
https://doi.org/10.1016/j.nwnano.2024.100033View
Published, Version of Record (VoR) Open

Abstract

Functionalization Graphene oxide Ionic Liquids Melamine separation
Highly permeable and selective membranes with long-term stability are needed to reduce operating and capital costs of industrial gas-separation units. In this study, we fabricate new membranes made of melamine (M)- and imidazolium-based ionic liquid (IL)-modified graphene oxide (GO) deposited on a porous support and buried with a polydimethylsiloxane (PDMS) layer. The CO /N and CO /CH ideal selectivities of the composite membranes are respectively 65 % and 70 % higher than those of the membranes containing only the IL. This significant improvement in ideal selectivity is attributed to synergic effects of nanochannels created by GO, fixed facilitated transport provided by the IL and numerous amine groups in the melamine structure, and the increased polarity of the membrane caused by the presence of the IL. The composite membrane has a pure CO permeance of 47 GPU with a high CO /N ideal selectivity of 109 and a satisfactory CO /CH ideal selectivity of 39. The composite membrane maintains stable performance over a 60-hour operation, highlighting its long-term reliability. The outstanding performance, coupled with the ease of fabrication, underscores the potential of these composite membranes for practical and efficient CO removal from both natural and flue gas streams in real-world applications.

Metrics

1 Record Views

Details

Logo image