Novel biphasic amino-functionalized ionic liquid solvent for CO₂ capture: kinetics and regeneration heat duty

Amino-functionalized ionic liquid biphasic solvents present excellent absorption capacity, regeneration ability, and energy consumption savings, which make them a possible candidate for CO₂ capture. The kinetics and regeneration heat duty of the [TETAH][Lys]-ethanol-water system capturing CO₂ were investigated in this work. The mass transfer and kinetic parameters, including the overall reaction rate constant (k_ov), the reaction rate constant (k₂), and the enhancement factor (E), were assessed at diverse concentrations and temperatures. At 303.15 K, the k₂ of CO₂ capture into the [TETAH][Lys]-ethanol-water solution was 58,907.30 m³ kmol^-1 s^-1. The Arrhenius equation was introduced to evaluate the relations between k₂ and the reaction temperature, which can be presented as [Formula: see text] The regeneration heat duty of the novel biphasic solvent was 35.5 and 62.39% lower than those of [TETAH][Lys]-water and the benchmark monoethanolamine solution, respectively. An efficient absorption performance and lower energy requirement indicate the great potential for this application.