Developing novel hybrid ionic liquid/porous material/co-solvent absorbents with the confinement effect is essential for CO₂ separation. In this study, CO₂ solubilities in 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide/titanium dioxide/polyethylene glycol ([Hmim][Tf₂N]/TiO₂-PEG200) with different ratios of [Hmim][Tf₂N]/TiO₂ and various roughnesses of TiO₂ (P25 and T500) were measured and described with the Henry's law. Furthermore, the contribution of the confinement effect on the CO₂ solubility was quantified, and the relationship between the surface roughness and molecular parameters was established for predicting its contribution to the confinement effect. In addition, the hybrid absorbent was recycled by a multi-cycle experiment. The results show that the contribution of confinement effect on CO₂ absorption capacity (on mass basis) and Gibbs free energy occupy around 24.5% and 8.12% in [Hmim][NTf₂]/T500-PEG200 (${\mathrm{w}}_{\left[\text{Hmim}\right][\text{NT}{\mathrm{f}}_2]/\mathrm{T}500}$ = 2.88 wt%) at 308.2 K, respectively. The surface roughness can double the confinement effect. Based on the CO₂ absorption capacity and enthalpy, [Hmim][NTf₂]/T500-PEG200 (${\mathrm{w}}_{\left[\text{Hmim}\right][\text{NT}{\mathrm{f}}_2]/\mathrm{T}500}$ = 2.88 wt%) is a promising hybrid absorbent for CO₂ separation.

开发具有约束作用的新型混合离子液体/多孔材料/助溶剂吸收剂对于分离CO ₂是必不可少的。在这项研究中，CO ₂在1-己基-3-甲基咪唑双（三氟甲基磺酰基）酰亚胺/二氧化钛/聚乙二醇（[Hmim] [Tf ₂ N] / TiO ₂ -PEG200）中的溶解度不同_测量2 N] / TiO ₂以及各种粗糙度的TiO ₂（P25和T500），并用亨利定律进行描述。此外，限制作用对CO ₂的贡献定量溶解度，并建立表面粗糙度和分子参数之间的关系，以预测其对限制作用的贡献。另外，通过多循环实验将混合吸收剂再循环。结果表明的限制效应对CO的贡献₂吸收能力（基于质量）和吉布斯自由能占据围绕24.5％和8.12％的[HMIM] [NTF ₂ ] / T500-PEG200（${\mathrm{w}}_{\left[\text{汉姆}\right][\text{新台币}{\mathrm{F}}_{\mathrm{2个}}]/\mathrm{Ť}500}$ 分别在308.2 K时= 2.88 wt％）。表面粗糙度可以使限制作用加倍。基于CO _2的吸收能力和焓，[Hmim] [NTf ₂ ] / T500-PEG200（${\mathrm{w}}_{\left[\text{汉姆}\right][\text{新台币}{\mathrm{F}}_{\mathrm{2个}}]/\mathrm{Ť}500}$ ＝ 2.88wt％）是用于CO ₂分离的有前途的混合吸收剂。