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

Abstract

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.