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A vertically-stacked MXene/rGO composite membrane for highly efficient H2/CO2 separation.
Zhaorui Dong1, Yiyi Fan1, Xiuxia Meng1
1School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, P.R. China. mengxiux@sdut.edu.cn.
Chemical Communications (Cambridge, England)
|April 22, 2024
Summary
This study presents a novel MXene/rGO membrane for efficient hydrogen/carbon dioxide separation. The membrane achieves high selectivity and permeance, showing promise for carbon capture applications.
Area of Science:
- Materials Science
- Chemical Engineering
- Environmental Science
Background:
- Efficient separation of hydrogen (H2) and carbon dioxide (CO2) is crucial for carbon capture and sequestration (CCS) technologies.
- Existing membranes often face challenges with selectivity, permeance, or stability at elevated temperatures.
Purpose of the Study:
- To develop a composite membrane with enhanced molecular sieving capabilities for H2/CO2 separation.
- To investigate the performance of a vertically-stacked MXene/reduced graphene oxide (rGO) membrane.
Main Methods:
- Fabrication of a vertically-stacked composite membrane using MXene and rGO.
- Characterization of the membrane's structure and transport properties.
- Gas permeation experiments to evaluate H2/CO2 selectivity and H2 permeance at 120 °C.
Main Results:
- The MXene/rGO membrane exhibited ultrashort transport channels.
- Achieved a high H2/CO2 selectivity of up to 83.
- Demonstrated a high H2 permeance of 2.7 × 10^-7 mol m^-2 s^-1 Pa^-1 at 120 °C.
Conclusions:
- The developed composite membrane shows outstanding molecular sieving performance for H2/CO2 separation.
- The membrane's high selectivity and permeance highlight its potential for industrial applications in CCS.
