H2S Chemisorption on Copper-ETS-2: Experiment and Modeling

Copper supported on Engelhard Titanosilicate-2 (ETS-2) has been shown 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 proposed model based on the rigorous mass balance equations for the fluid and solid phases. The 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 regeneration as well as on the characteristics and magnitudes of the H2S-material interactions.