Journal
JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
Volume 60, Issue 8, Pages 925-931Publisher
AIR & WASTE MANAGEMENT ASSOC
DOI: 10.3155/1047-3289.60.8.925
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Funding
- Ministry of Science and Higher Education of Poland [1 T09C 018 30]
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The carbon dioxide (CO(2)) desorption rate from CO(2)-loaded aqueous diethanolamine (DEA) solutions was measured using a stirred cell with a flat gas-liquid interface. The measurements were performed in the temperature range of 293.15-313.15 K and an amine concentration range of 10-20% mass DEA. Measurements were based on a semibatch isothermal absorption of the gas until the equilibrium state was reached, followed by desorption, which was initiated by the pressure release in the system. A simplified mass transfer model based on the film theory coupled with CO(2) mass balance was developed to interpret the experimental data. On the basis of the proposed model, the initial mass transfer rates were calculated from the experimental. results. The calculated initial desorption rates enabled estimation of the enhancement factor for CO(2) mass transfer from aqueous DEA solutions. Analysis of the experimental data showed that desorption took place in the diffusive mass transfer regime.
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