Screening of Aqueous Amine‐Based Solvents for Postcombustion CO₂ Capture by Chemical Absorption

Abstract

In relation with CO2 capture by chemical absorption into aqueous amine‐based solvents, absorption and regeneration parameters by separate absorption and regeneration tests are determined. An absorption parameter for different types of amine‐based solvents is evaluated by performing absorption tests at 298 K and atmospheric pressure with a gas‐liquid contactor and deducing apparent kinetic constants. The regeneration parameter is obtained from a CO2 concentration temporal profile measured in a regeneration cell at the boiling temperature of each solvent. By combining both parameters it is possible to compare the absorption‐regeneration performances of all the solvents studied. Good absorption‐regeneration performances of cyclical amines, especially of piperidine (PIP) and piperazine (PZ), are highlighted. The interesting potential of 2‐amino‐2‐methyl‐1‐propanol (AMP) and methyldiethanolamine (MDEA) activated with PZ and PIP is also considered.

Current status and future development of solvent-based carbon capture

“…These drawbacks of MEA has been addressed through development of new solvents which include mixed amine solvents such as mixtures of MEA and MDEA, AMP and PZ among others (Dubois and Thomas 2012), ammoniabased solvents (Darde et al 2010), amino acid solvent (Brouwer et al 2005), biphasic solvents (Raynal et al 2011) and ionic liquid-based solvents (Boot-Handford et al 2014;Zacchello et al 2016). The new solvents have shown great potential.…”

Experimental study on phase change solvents in CO2 capture by NMR spectroscopy

“…Thus, for the development of new cost effective CO 2 capture processes, many research groups have focused on the reduction of regeneration energy by suggesting mixture solvent systems such as mixed amine systems (Aronu et al, 2010;Austgen et al, 1991;Barzagli et al, 2011;Bishnoi and Rochelle, 2002b;Bougie and Iliuta, 2010;Brúder et al, 2012;Dubois and Thomas, 2012;Seo and Hong, 1996).…”

Amine Solutions for Biogas Upgrading: Ideal versus Non‐Ideal Absorption Isotherms

“…For tertiary alkanolamines, the mechanism is different, resulting in the formation of a bicarbonate [24]:…”