Performance of GO laminated membranes in H2/CO2 separation as a function of the membrane thickness
Year: 2024
Type: article
Abstract: Hydrogen gas (H 2 ) is a promising energy carrier capable of replacing fossil fuels and achieving net zero emissions. However, purifying H 2 for applications like fuel cells and industrial processes is challenging due to impurities affecting performance. Two-dimensional (2D) materials, particularly graphene-based membranes, are promising for H 2 purification due to their unique properties. The hydrogen (H 2 ) permeation capability of graphene-based membranes is particularly significant. This study examines the use of commercial and cost-effective graphene oxide (GO) to fabricate multilayer graphene membranes, focusing on the impact of membrane thickness on H 2 and CO 2 separation. By using a scalable vacuum filtration method to coat porous ceramic substrates , membranes with controlled thicknesses were produced and characterised using AFM , FESEM , XRD , and gas permeation measurements. The study identified an optimal membrane thickness range (4 nm–250 nm) and the GO quantity (0.44 μg/cm 2 to 1.76 μg/cm 2 ) needed for effective H 2 /CO 2 separation. This research aims to guide the development of cost-effective, mass-produced 2D-based membranes for industrial H 2 purification.
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,400
Funder: National University of Singapore
OpenAlex ID: W4403225102