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Process simulation and analysis of carbon capture with an aqueous mixture of ionic liquid and monoethanolamine solvent

Abstract : This study investigated the prospect of using aqueous mixture of 1-butylpyridinium tetrafluoroborate ([Bpy][BF4]) ionic liquid (IL) and monoethanolamine (MEA) as solvent in post-combustion CO2 capture (PCC) process. This is done by analysis of the process through modelling and simulation. In literature, reported PCC models with a mixture of IL and MEA solvent were developed using equilibrium-based mass transfer approach. In contrast, the model in this study is developed using rate-based mass transfer approach in Aspen Plus®. From the results, the mixed aqueous solvent with 5–30 wt% IL and 30 wt% MEA showed 7%–9% and 12%–27% less specific regeneration energy and solvent circulation rate respectively compared to commonly used 30 wt% MEA solvent. It is concluded that the IL concentration (wt%) in the solvent blend have significant impact on specific regeneration energy and solvent circulation rate. This study is a starting point for further research on technical and economic analysis of PCC process with aqueous blend of IL and MEA as solvent.
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Submitted on : Friday, November 26, 2021 - 4:48:11 PM
Last modification on : Saturday, November 27, 2021 - 3:48:58 AM

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Baptiste Zacchello, Eni Oko, Meihong Wang, Fethi Aloui. Process simulation and analysis of carbon capture with an aqueous mixture of ionic liquid and monoethanolamine solvent. International Journal of Coal Science & Technology, 2017, 4 (1), pp.25-32. ⟨10.1007/s40789-016-0150-1⟩. ⟨hal-03451934⟩

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