The use of Solid State NMR in the study of CO2 adsorption

by Dr Ricardo Vieira

Wednesday 1 Mar 2023, 14:00 → 15:00 Portugal

Sala de Conferências (Departamento de Física FCTUC)

Carbon capture can play a significant role in mitigating carbon emissions in the future and is a key technology for decarbonization. Nevertheless, the conventional industrial technology based on liquid amine absorbents suffers from several limitations such as poor chemical stability and high regeneration energy requirements. Hence, the use of solid sorbents able to selectively capture CO2 is a desirable alternative. To improve the performance of solid sorbents and make them feasible at the industrial level, it is crucial to elucidate CO2 capture mechanisms. In addition to conventional techniques, such as volumetric and gravimetric gas adsorption, the use of spectroscopic techniques, namely ssNMR, can be a great asset, as it unveils extremely useful information on the CO2 adsorption mechanisms. Experimental ssNMR spectroscopy was used to quantify the CO2 capture capacity of SBA-15-type silica modified with (3aminopropyl)triethoxysilane (APTES) at different gas pressures.