Display omitted •An in-situ regenerated Cu/zeolite H2S adsorbent with high sulfur capacity was prepared.•Cu/zeolite adsorbent can be stable regenerated at lower temperatures (280 °C) in air.•MOR zeolite not only act as carriers, but also play critical role for regeneration. Desulfurization of blast furnace gas (BFG) is essential for steel companies to achieve its cleaner utilization. In this study, an in-situ regeneratable H2S adsorbent with a high sulfur capacity was developed. Zeolites with specific silica-aluminum ratios were selected, and hybrid Cu/zeolites adsorbents were synthesized using an impregnation method. The optimal adsorbent (DSZ-2) exhibited a high breakthrough sulfur capacity of 39.0 mg/g at 80 °C. Moreover, this adsorbent can also be in-situ regenerated at lower temperatures (280 ℃) and the regenerated adsorbent has even a higher breakthrough sulfur capacity of 49.0 mg/g. The possible desulfurization and regeneration mechanism of the DSZ-2 absorbent are discussed. Due to its high sulfur capacity and good regenerability, this absorbent has great application prospect in the removal of H2S from BFG.