Oligoamine ionic liquids supported on mesoporous microspheres for CO2 separation with good sorption kinetics and low cost. Issue 39 (July 2020)

• Record Type: Journal Article
• Authors: Zhou, Ming; Khokarale, Santosh Govind; Balsamo, Marco; Mikkola, Jyri-Pekka; Hedlund, Jonas
• Is Part Of: Journal of CO₂ utilization. Issue 39(2020)
• Publication Date: 2020-07
• Subjects: Amines -- Carbon dioxide -- Gas separation -- Ionic liquids -- Kinetics; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2020.101186
• Languages: English
• ISSNs: 2212-9820

Abstract

Highlights: Amberlite supported amine and ILs sorbents show high adsorption kinetics. IL-AR sorbent shows improved thermal stability and regenerability. Low cost of IL-AR sorbent make industrial CO2 separation possible. Two-regimes deactivation model provides accurate interpretation of the kinetic data. Abstract: Ionic liquids display good CO2 absorption capacity but poor absorption kinetics and high costs. In the present work, we show that these problems can be solved by impregnating the new low cost ionic liquid pentaethylenehexammonium chloride [PEHA][Cl] and the corresponding amine precursor on a low cost mesoporous microsphere support. Nitrogen adsorption/ desorption, high-resolution SEM and thermogravimetric analysis were employed to analyze the structural and thermal properties of the prepared sorbents. The CO2 adsorption and desorption performance was studied by column experiments and mathematical models were fitted to the data. The results showed that sorbents displayed excellent sorption kinetics and capacity, comparable to the best reports in the literature. In addition, the sorbents could be regenerated and displayed high thermal stability. Finally, the costs of the sorbents developed in the present work is much lower than previously reported sorbents. Therefore this novel supported IL system could be promising for industrial CO2 removal and recovery applications.