2019 Volume 127 Issue 9 Pages 606-611
Chabazite was successfully synthesized from Kaolin for the first time via a calcination-hydrothermal process. The effects of Si/Al ratio, (OH)−/Si ratio, calcination time and hydrothermal time on the synthesis process were investigated one by one, and the final synthesis scheme under this condition was obtained. The adsorption isotherms of CO2 and N2 were measured at 30–90°C and 0–120 kPa to measure the gas adsorption properties of chabazite. In this paper, the adsorption capacity of chabazite to CO2 and N2 could reach 1.61 and 0.66 mmol/g respectively at 120 kPa and 30°C. In addition, chabazite showed excellent CO2/N2 selectivity over the full pressure range.