Investigation of glycerol-derived binary and ternary systems in CO2 capture process

ZhaoheHuang, BinJiang, HuaweiYang, BaoyuWang, NaZhang, HaozhenDou, GuangsenWei, YongliSun, LuhongZhang

School of Chemical Engineering and Technology, Tianjin University, Tianjin, PR China

Highlights

  • A series of glycerol-derived CO2 binding organic liquids were synthesized and systematic studied for CO2 capture.
  • The role of glycerol in superbase environment for carbon dioxide capture was clarified.
  • The easy deprotonation property of glycerol in superbase environment directly contributed to CO2 capture.

Abstract

Glycerol, an abundant byproduct in biodiesel industry process, has received a lot of attention in recent years. In this work, a series of glycerol-derived binary and ternary CO2 binding organic liquids (CO2BOLs), were proposed for carbon capture. Physical properties, 1H NMR spectra and FT-IR spectra of these systems were studied to describe the multiple interactions between constituents. The CO2 absorption performances were evaluated in details, and excellent CO2 uptake capacity was achieved. In order to systematically clarify the role of glycerol in super base environment for CO2 capture process, binary systems were further explored to support the conclusions both theoretically and experimentally. The characteristic that glycerol could easily be deprotonated in super base environment, was proved to be benefit to the efficient and homogeneous capture of CO2, and a corresponding absorption mechanism was put forward. In addition, the effects of superbase and ionic liquids on absorption were also investigated. The results in this work showed how green, economic and high performance absorbents could be designed for applications of carbon capture.

Keywords

Carbon dioxide capture; Deep eutectic solvents; CO2BOLs; Glycerol

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