Solubility of carbon dioxide in aqueous mixtures of alkanolamines

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Journal of Chemical and Engineering Data; (United States)

DOI:https://doi.org/10.1021/je00015a034· OSTI ID:7145983

Dawodu, O F; Meisen, A ^[1]

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1. Univ. of British Columbia, Vancouver, British Columbia (Canada). Dept. of Chemical Engineering

The solubility of CO[sub 2] in water + N-methyldiethanolamine + monoethanolamine (MDEA + MEA) and water + N-methyldiethanolamine + diethanolamine (MDEA + DEA) are reported at two compositions of 3.4 M MDEA + 0.8 M MEA or DEA and 2.1 M MDEA + 2.1 M MEA or DEA at temperatures from 70 to 180 C and CO[sub 2] partial pressures from 100 to 3,850 kPa. The solubility of CO[sub 2] in the blends decreased with an increase in temperature but increased with an increase in CO[sub 2] partial pressure. At low partial pressures of CO[sub 2] and the same total amine concentration, the equilibrium CO[sub 2] loadings were in the order MDEA + MEA > MDEA + DEA > MDEA. However, at high CO[sub 2] partial pressures, the equilibrium CO[sub 2] loadings in the MDEA solutions were higher than those of the MDEA + MEA and MDEA + DEA blends of equal molar strengths due to the stoichiometric loading limitations of MEA and DEA. The nonadditivity of the equilibrium loadings for single amine systems highlights the need for independent measurements on amine blends.

• OSTI ID: 7145983
• Journal Information: Journal of Chemical and Engineering Data; (United States), Vol. 39:3; ISSN 0021-9568
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
02 PETROLEUM
AMINES
SOLVENT PROPERTIES
CARBON DIOXIDE
SOLUBILITY
CARBON OXYSULFIDE
CARBON SULFIDES
CLEANING
EXPERIMENTAL DATA
HYDROGEN SULFIDES
NATURAL GAS
PRESSURE DEPENDENCE
REFINERY GASES
SYNTHESIS GAS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
DATA
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROGEN COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
SULFIDES
SULFUR COMPOUNDS
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