CO/sub 2/ absorption into aqueous MDEA and MDEA/MEA solutions
The rate of absorption of CO/sub 2/ into 2 molal MDEA was measured by following solution composition in a stirred-cell batch reactor. The conditions investigated were 9.5 - 62/sup 0/C at a nominal CO/sub 2/ pressure of 1 atm. The data were modelled with a combined mass transfer and equilibrium model which treated the reaction of CO/sub 2/ with MDEA as second order and reversible, rather than pseudo-first order. The resulting activation energy was 13.7 kcal/gmol, and the rate constant at 30.5/sup 0/C was 4.0 (Ms)/sup -1/. The assumption of pseudo-first order conditions was found to reduce the apparent activation energy to approximately 9 kcal/gmol. CO/sub 2/ absorption into 1.36 molal MDEA/0.61 molal MEA was studied at 31/sup 0/C. The experimental data were predicted better by a mass transfer model based on a shuttle mechanism than by one with two parallel reactions.
- OSTI ID:
- 6250830
- Report Number(s):
- CONF-870323-
- Resource Relation:
- Conference: American Institute of Chemical Engineers spring national meeting, Houston, TX, USA, 29 Mar 1987; Other Information: Technical Paper 43E
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBON DIOXIDE
ABSORPTION
ETHANOL
ADSORPTION
METHYLAMINE
AQUEOUS SOLUTIONS
CHEMICAL REACTION KINETICS
EQUILIBRIUM
MASS TRANSFER
MATHEMATICAL MODELS
MEDIUM PRESSURE
MEDIUM TEMPERATURE
ALCOHOLS
AMINES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
DISPERSIONS
HYDROXY COMPOUNDS
KINETICS
MIXTURES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SOLUTIONS
SORPTION
400201* - Chemical & Physicochemical Properties