本研究以[P2228][2-CNPyr]與[P66614][2-CNPyr]兩種離子液體為吸收劑，利用Aspen Plus建立CO2吸收/再生製程，並以30 wt% MEA製程作為比較基準，探討不同煙道氣CO2濃度下之操作條件、公用工程需求與經濟表現。離子液體之物性描述以亨利常數、反應平衡與黏度關係式。物性與吸收資料回歸結果顯示，兩種離子液體之黏度模型R2皆為0.99，CO2吸收等溫線之R2分別為0.9766與0.9939；導入文獻基準流程後，主要製程結果亦與既有COSMO-based案例維持相近量級，可作為後續流程分析之基礎。
研究案例分別採用低CO2濃度之FCC煙道氣與高CO2濃度之Cement煙道氣，皆以10 t/h進料及90% CO2捕捉率為共同基準。操作條件篩選顯示，[P2228][2-CNPyr]於兩種煙道氣條件下皆可維持 1 bar 吸收；[P66614][2-CNPyr]則分別需升壓至2.9與4.8 bar。於FCC案例中，經操作條件篩選與貧富液熱交換後，[P2228][2-CNPyr]之單位加熱與冷卻負荷分別由0.757與0.845降至0.431與0.521 kWh/kg CO2；[P66614][2-CNPyr]則由2.014與2.102降至0.427與0.973 kWh/kg CO2，但升壓吸收使其電力需求增加至0.628 kWh/kg CO2，顯示製程改善可能伴隨不同形式公用工程需求之轉移。
經濟評估中，[P2228][2-CNPyr]於電力加熱情境下之FCC與Cement單位CO2捕獲成本分別為167.63與97.97 USD/t CO2，低於MEA之309.34與197.53 USD/t CO2，於蒸氣加熱情境下亦維持最低成本。[P66614][2-CNPyr]則因煙道氣壓縮、冷卻及設備成本，在FCC蒸氣加熱情境下成本高於MEA。納入吸收劑庫存與補充成本後，[P2228][2-CNPyr]於四種成本情境下皆具有正值價格上限。依本研究流程與成本假設，[P2228][2-CNPyr]在不同煙道氣條件下呈現較穩定之製程與經濟表現。

This study evaluates two aprotic heterocyclic anion ionic liquids, [P2228][2-CNPyr] and [P66614][2-CNPyr], for post-combustion CO₂ capture and compares them with 30 wt% monoethanolamine (MEA). An Aspen Plus V14 absorption/regeneration framework was established using temperature-dependent correlations for CO₂ physical dissolution, reversible chemical absorption, and ionic-liquid viscosity. The model was validated against experimental property data and a published process benchmark. Two industrial flue-gas cases were then investigated: FCC gas containing 13 wt% CO₂ and cement gas containing 28 wt% CO₂, both at 10 t/h and with 90% CO₂ capture. Absorption and regeneration conditions were screened, followed by lean/rich heat recovery and total annualized cost analysis. [P2228][2-CNPyr] maintained 1 bar absorption in both cases and achieved specific total process loads of 1.043 and 1.031 kWh/kg CO₂ for FCC and cement gases, respectively, about 62% lower than MEA. Under electric heating, its capture costs were 167.63 and 97.97 USD/t CO₂, and it remained the lowest-cost option under steam heating. In contrast, [P66614][2-CNPyr] required pressurized absorption and showed greater sensitivity to flue-gas composition and utility pricing. Overall, [P2228][2-CNPyr] exhibited the most favorable energy and economic performance under the assumptions of this study.

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