Heat of Absorption of CO2 in Aqueous Solutions of DEEA, MAPA and their Mixture

Publication: Research - peer-reviewConference article – Annual report year: 2013

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A reaction calorimeter was used to measure the differential heat of absorption of CO2 in phase change solvents as a function of temperature, CO2 loading and solvent composition. The measurements were taken for aqueous solutions of 2-(diethylamino)ethanol (DEEA), 3-(methylamino)propylamine (MAPA) and their mixture. The tested compositions were 5M DEEA, 2M MAPA and their mixture, 5M DEEA + 2M MAPA which gives two liquid phases on reacting with CO2. Experimental measurements were also carried out for 30% MEA used as a base case. The measurements were taken isothermally at three different temperatures 40, 80 and 120°C at a CO2 feed pressure of 600kPa. In single aqueous amine solutions, heat of absorption increases with increase in temperature and depends on thetype of amine used. DEEA, a tertiary amine, has lower heat of absorption compared to MAPA being a diamine with primary and secondary amine functional groups. For amine mixtures, heat of absorption is a function of CO2 loading and temperature. The heat of absorption against CO2 loading depends on the composition of the amines in the mixture. All the measured data in this work were compared with 30% MEA at absorption (40°C) and desorption (120°C) conditions.
Original languageEnglish
JournalEnergy Procedia
Publication date2013
Volume37
Pages1532-1542
ISSN1876-6102
DOIs
StatePublished

Conference

ConferenceGHGT-11
CountryJapan
CityKyoto
Period18/11/1222/11/12
Internet addresshttp://www.ghgt.info/docs/GHGT-11/GHGT-11%20Programme%20Final%20web.pdf
CitationsWeb of Science® Times Cited: No match on DOI

Keywords

  • Heat of absorption, Calorimeter, Phase change solvents, CO2 capture, DEEA, MAPA
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