loading page

Double H-bonds multimer absorbent design for H2S absorption
  • +4
  • Peng-Ju Liang,
  • Qi-Xiang Wu,
  • Chun-Ran Chang,
  • Guang-Wen Chu,
  • Haikui Zou,
  • Bao-Chang Sun,
  • Jianfeng Chen
Peng-Ju Liang
Author Profile
Qi-Xiang Wu
Author Profile
Chun-Ran Chang
Author Profile
Guang-Wen Chu
Beijing University of Chemical Technology College of Chemical Engineering
Author Profile
Haikui Zou
Beijing University of Chemical Technology
Author Profile
Bao-Chang Sun
Beijing University of Chemical Technology College of Chemical Engineering

Corresponding Author:[email protected]

Author Profile
Jianfeng Chen
Beijing University of Chemical Technology
Author Profile

Abstract

A novel double H-bonds multimer absorbent for H2S absorption was designed via intermolecular self-assembly using DBU and EG under the guidance of QCC. The formation mechanisms of multimer absorbents and the absorption mechanisms between those absorbents and H2S were explored by QCC and experiments. It was found that the formed DBU-2EG multimer absorbent at the DBU/EG molar ratio of 1:2 has two intermolecular H-bonds with different strengths between DBU and EG, which can combine with H2S via weak H-bond. Furthermore, the characteristics analysis of multimer absorbents confirmed the above mechanisms. Experimental results indicated that the DBU-2EG has the highest H2S solubility of 2.64 mol/mol (DBU) with a low viscosity value of 15.12 mPa·s at 25 ℃ and desorption temperature below 60 ℃ at 100 kPa. The multimer absorbent exhibits great potential in the H2S capture process. In addition, this research provides an effective strategy for the design of absorbents.