Absorption of carbon dioxide into aqueous PAA solution containing diethanolamine

Reactive Absorption of Carbon Dioxide in l-Prolinate Salt Solutions

“…10,22,23 Three absorption regimes can be distinguished depending on the absolute value of the Hatta number and the Ha/E ∞ ratio. 8,9,18,19 Absorption taking place in the fast pseudo-firstorder (PFO) reaction regime can be assumed if the following condition is satisfied:…”

“…In the above equations, k ov is the overall reaction kinetic constant, D CO 2 is the diffusion coefficient of CO 2 in a solution, D Am is the diffusion coefficient of the liquid phase reactant in a solution and v AAS is the stoichiometric coefficient that in analogy to alkanolamines has a value of 2. 10,22,23 Three absorption regimes can be distinguished depending on the absolute value of the Hatta number and the Ha/E ∞ ratio. 8,9,18,19 Absorption taking place in the fast pseudo-firstorder (PFO) reaction regime can be assumed if the following condition is satisfied:…”

Density, Viscosity, and Performances of Carbon Dioxide Capture in 16 Absorbents of Amine + Ionic Liquid + H2O, Ionic Liquid + H2O, and Amine + H2O Systems

“…At present, chemical absorption is an effective way to separate CO 2 from industrial gases, − such as oil recovery gases, nature gases, syngas, and so on. The typical solvent is an amine, including 2-aminoethanol (MEA), 2-[2-hydroxyethyl(methyl)amino] ethanol (MDEA), 2-(2-hydroxyethylamino)ethanol (DEA), and 2-[bis(2-hydroxyethyl)amino] ethanol (TEA), or mixtures of amines as the common absorbents to capture CO 2 . − However, in light of their corrosion, volatility, toxicity, and high energy consumption, in recent years, some ionic liquids (ILs), such as 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim][BF 4 ]), 1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF 6 ]), tetrabutylphosphonium amino acid ILs ([P(C 4 ) 4 ][AA]), and hydroxyl ammonium ILs are designed and synthesized as absorbents to absorb and separate CO 2 from the mixture gases. ,− ILs manifest the excellent properties of recycling, being contamination-free, functionality, and high efficiency of scrubbing CO 2 ; thus, the IL-based capture process appears probably to be the promising choice of alternative or competitive technologies.…”

Measurement and correlation of physical properties of aqueous solutions of tetrabutylammonium hydroxide, piperazine and their aqueous blends

“…In this regard different techniques i.e. absorption through chemical solvent, physical absorption, separation by membrane, cryogenic process and microbial/algal systems have been developed, out of which most mature scientific and industrially adapted technique is absorption by liquid solvent [6][7][8][9][10]. Since long time, different types of solvents have been employed to capture carbon dioxide from various gas streams [11][12][13].…”