5 Conclusion
A novel DBU-2EG multimer absorbent for H2S absorption was designed by the self-assembly formation of two types of H-bonds with different strengths. A double H-bonding formation mechanism of DBU-2EG multimer absorbent and a double H-bonding absorption mechanism of H2S by DBU-2EG were explored via QCC and experiments. Based on these, the DBU-2EG multimer absorbent with an H2S absorption solubility of 2.64 mol/mol (DBU) (25oC, 1 atm) and viscosity of 15.12 mPa·s (25oC) was synthesized at the DBU/EG molar ratio of 1:2. In addition, the QCC and experimental studies proved that the absorption of H2S by DBU-2EG multimer absorbent is physical absorption. This work provides a novel high-efficiency multimer absorbent for absorption H2S, and the proposed development method of absorbent based on QCC gives an example for the rapid development of physical absorbents.