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• The absorption mechanism of SRSG absorbent for H 2 S and MM is physical absorption, and COS is chemical absorption. • RPB has been introduced for the simultaneous removal of organic and inorganic sulfur from gases. • The absorption efficiencies of H 2 S, MM and COS can simultaneously reach 99.99%, ∼100%, and ∼100%, respectively. In industries, many gases are required to remove hydrogen sulfide (H 2 S) and organic sulfur. However, it is still a huge challenge to achieve the efficient and simultaneous removal using a single process. Herein, a novel simultaneous removal sulfide gas (SRSG) absorbent is developed to simultaneously absorb H 2 S, methyl mercaptan (MM) and carbonyl sulfide (COS). The absorption mechanism between the SRSG absorbent and H 2 S, MM, COS is explored by quantum chemistry calculations (QCC) and controlled experiments in a rotating packed bed (RPB). Results indicate that the interaction between SRSG and H 2 S, MM belongs to physical absorption while COS absorption in SRSG obeys two molecule reaction mechanism. Furthermore, the effect of different operating conditions, including rotating speed (N), liquid flow rate (L), gas–liquid ratio (G / L) and temperature (T), on the absorption efficiencies (η) and gas volumetric mass transfer coefficient (K G a) of H 2 S, MM and COS is systematically investigated. It can be found that both η and K G a are dependent on those operating conditions. The optimal η value for H 2 S, MM and COS is up to 99.99%, 100%, 100%, respectively. Moreover, nondimensional equations for Sherwood number (Sh) are established, and the calculated and experimental values of Sh (H2S) , Sh (MM) and Sh (COS) are in agreement with a deviation within ±13%, ±13%, and ±20%, respectively. These results will provide a valuable potential technique for simultaneously removing acidic gas components from industrial gases. [ABSTRACT FROM AUTHOR]