Experimental Investigation on the Performance of [APMIm][NTf2] for Capturing CO2 from Flue Gas of the Cement Kiln Tail

Facing the global warming trend, humanity has been paying more and attention to Carbon Capture, Utilization Storage. Large amounts of CO2 is emitted with burning fossil fuel as well by some special industrial processes like decomposition calcium carbonate in a cement plant. The industry contributes about 7% total worldwide emissions concentration flue gas kiln tail even exceeds 30%. Ionic liquid considered be an effective potential material capture CO2. In order investigate performance ionic liquids for capturing from tail, experiment system was established liquid, [APMIm][NTf2] (1-aminopropyl-3-imidazolium bis(trifluoromethylsulfonyl)imine), tested using pure simulated gas. results showed that both physical chemical absorption play roles while dominates process. Both capacity rate decrease raising operating temperature. CO2, \(0.296\,{\rm{mo}}{{\rm{l}}_{{\rm{C}}{{\rm{O}}_2}}} \cdot {\rm{mo}}{{\rm{l}}_{{\rm{IL}}}}^{ - 1}\) at 30°C \(0.067\,{\rm{mo}}{{\rm{l}}_{{\rm{C}}{{\rm{O}}_2}}} 70°C. Meanwhile, can regenerated recycling without obvious changes capacity. When used rather than sharp observed obviously. dropped \(0.038\,{\rm{mo}}{{\rm{l}}_{{\rm{C}}{{\rm{O}}_2}}} 1}\), 12.8% Additionally, natural desorption affected experimental absorption-desorption extent.