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.