Measurement of competitive \(\text {CO}_{2}\) and \(\text {H}_{2}\text {O}\) adsorption on zeolite 13X for post-combustion \(\text {CO}_{2}\) capture

The adsorption isotherms of water on Zeochem zeolite 13X were measured from 22 to 100 \(^{\circ }\text {C}\) and 0 to \(2.1\times 10^{-2}\) bar using volumetry and gravimetry. The equilibrium data was fit to a dual-site Langmuir isotherm. A series of single component H₂O dynamic column breakthrough experiments were measured on zeolite 13X at \( 22\,^{\circ }\text {C}\) and 0.97 bar. These breakthrough experiments were modeled and simulated with our built in-house adsorption simulator. The simulator predicted composition and thermal breakthrough behavior well for all single component experiments. Competitive \(\text {CO}_{2}\)/\(\text {H}_{2}\text {O}\) breakthrough experiments were then performed at \( 22\,^{\circ }\text {C}\) and 0.99 bar. The collected equilibrium data showed up to a 98% loading reduction for \(\text {CO}_{2}\) (compared to the single component loading) for \(\approx \) 74.4% RH while \(\text {H}_{2}\text {O}\) showed no reduction compared to its single component loading. The binary equilibrium isotherms were described by an explicit water-loading adjusted dual-site Langmuir isotherm.