The influence of matrix structure and thermal annealing-hydrophobic layer on the performance and durability of carbon molecular sieving membrane during physical aging

Adsorption–desorption of CO2 on zeolite-Y-templated carbon at various temperatures

This study aims to investigate the adsorption–desorption of CO₂ on a micro-mesoporous zeolite-Y-templated carbon (ZTC) at various temperatures. ZTC was synthesized via sucrose impregnation, carbonization, and template removal. The adsorption–desorption of CO₂ on ZTC was performed using the gravimetric method. Results showed that the CO₂ adsorption capacity was 9.51 wt%, 5.60 wt%, and 3.47 wt%, and desorbed up to 59.83%, 69.70%, 77.5% for temperatures of 30 °C, 40 °C, and 50 °C, respectively. The adsorption process of CO₂ at temperatures of 30 °C and 40 °C follow the pseudo-second order, while at 50 °C follows intra-particle diffusion. The thermodynamic analyses indicate that the adsorption was due to physisorption.

A micro-mesoporous structure of ZTC was synthesized via an impregnation method, and the structure assisted in a faster CO₂ adsorption–desorption equilibrium.