FIGURE 1 Multimer absorbents for H2S absorption design strategy. (a) A new type of physical absorbent for H2S is designed, which has both chemical and physical absorbent absorption characteristics. Strong organic alkaline chemical absorbents (DBU) and low-viscosity physical absorbents (EG) are mixed in a molar ratio of 1:1 and 1:2 to form a new type of multimer absorbents containing H-bonds. Under the influence of H-bonds, the absorbent quickly absorbs H2S and forms complexes. (b) ESP map of DBU, EG, H2S, DBU-EG multimer and DBU-2EG multimer.