Chemisorption of H₂S on Copper-ETS-2: Experiment and Modeling of a Packed Column

Copper supported on Engelhard Titanosilicate-2 (ETS-2) showed to be a promising adsorbent for deep H₂S removal (to sub-ppm levels) for gas purification applications at room temperature. Because of the high external surface area and the cation exchange capacity of ETS-2, Cu ions are highly dispersed and very accessible to H₂S molecules. In this study, H₂S column breakthrough experiments are analyzed by a dynamic model based on the rigorous mass balance equations applied to the fixed-bed. The proposed model also includes the chemical reaction term, which is affected by the deactivation of the solid phase. Temperature-programmed desorption tests provided insight on the material characterization as well as on the relative magnitudes of the H₂S-material interactions.