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

Baptiste Zacchello , Eni Oko , Meihong Wang , Fethi Aloui (1)

1 LAMIH - Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201

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.

Domaines: Mécanique [physics.med-ph]

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⟩