CO2 absorption using a hybrid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide/titanium dioxide/polyethylene glycol absorbent

• DOI: 10.1016/j.fluid.2021.113011
• Publication Date: 2021-03-12T07:00:42Z
• Authors: Yifeng Chen; Zhengxing Dai; Xiaoyan Ji; Xiaohua Lu
• Keywords: Imide; Titanium Dioxide

Developing novel hybrid ionic liquid/porous material/co-solvent absorbents with the confinement effect is essential for CO2 separation. In this study, solubilities in 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide/titanium dioxide/polyethylene glycol ([Hmim][Tf2N]/TiO2-PEG200) different ratios of [Hmim][Tf2N]/TiO2 and various roughnesses TiO2 (P25 T500) were measured described Henry's law. Furthermore, contribution on solubility was quantified, relationship between surface roughness molecular parameters established predicting its to effect. addition, absorbent recycled by a multi-cycle experiment. The results show that absorption capacity (on mass basis) Gibbs free energy occupy around 24.5% 8.12% [Hmim][NTf2]/T500-PEG200 (w[Hmim][NTf2]/T500 = 2.88 wt%) at 308.2 K, respectively. can double Based enthalpy, promising