Selective trapping of CO2 gas and cage occupancy in CO2–N2 and CO2–CO mixed gas hydrates

Abstract

Hydrate-based CO₂ trapping from CO₂–N₂ and CO₂–CO gas mixtures is shown by Raman spectroscopy – the results are of interest for new separation and capture technology. A better trapping efficiency is measured for low CO₂ concentrations and N₂-based gas mixtures. Moreover, it is observed that CO molecules would impede hydrate formation from ice when a CO-enriched gas mixture is considered.