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Screening of Aqueous Amine‐Based Solvents for Postcombustion CO 2 Capture by Chemical Absorption

2012; Wiley; Volume: 35; Issue: 3 Linguagem: Inglês

10.1002/ceat.201100523

1521-4125

Lionel Dubois, Diane Thomas,

Membrane Separation and Gas Transport

Abstract In relation with CO 2 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 CO 2 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.