Carbon dioxide adsorbent based on rich amines loaded nano-silica

- CO2 adsorbent based on rich amine functionalized nano-silica was fabricated.
- Polyacrylic acid acted as a multi-functional bridge.
- CO2 adsorption capacity is 3.8 mmol/g at 100 KPa CO2, 40 °C.
- The adsorbent exhibited a good selectivity for CO2-N2 separation.
- The adsorbent could be easily regenerated.