This paper presents tests related to the reactivity of commercial Hi-Fuel sorbent toward H 2 S (H 2 S/N 2 mixture) in a packed bed at 300 • C. The sorbent used for breakthrough test was characterized before and after test by ESEM-EDX, FTIR-ATR, Raman, and elemental analyses. Testing reveals that the commercial sorbent contains two compounds reacting with H 2 S: ZnO and ZnCO 3 . According to thermodynamical studies, the reactivity of ZnCO 3 at 300 • C is privileged (K R = 9.5 × 10 8 ) than ZnO (K R = 6.6× 10 6 ). In addition, the reaction of H 2 S with ZnCO 3 induces a volume decrease, which promotes the movement of gas through the newly formed layer. The properties of this sorbent thus hold a good potential for the desulfurization process of gases polluted with H 2 S. We observed that the maximum sulfidation rate was reached on the surface of the sorbent and showed a maximum conversion of 27%.