Journal
12TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-12
Volume 63, Issue -, Pages 773-780Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.egypro.2014.11.086
Keywords
NH3 neutralized amino acids solutions; NH3 vapour loss; KG of CO2; chemical equilibrium model
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Amino acid salts are effective promoters to improve CO2 absorption in NH3-based solutions, but at the expense of an increase in NH3 vapour loss. To address this issue, we proposed the neutralisation of amino acids using NH3 instead of KOH and investigated the effect of neutralisation methods on NH3 vapour loss and mass transfer coefficient of CO2 in amino acids/NH3 mixtures at 15 degrees C. It has been found that NH3 neutralized amino acids solutions can enhance K-G of CO2 in the NH3 solution and suppress NH3 loss at the same time. Among three amino acids investigated, taurine is most suitable for the NH3 neutralisation. We developed the chemical equilibrium model for amino acid-NH3-CO2-H2O and used the model to predict the species profiles in the mixture and explain the experimental results. (C) 2014 The Authors. Published by Elsevier Ltd.
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