- Title
- Amino acids/NH₃ mixtures for CO₂ capture: effect of neutralization methods on CO₂ mass transfer and NH₃ vapour loss
- Creator
- Yang, Nan; Yu, Hai; Xu, Dong-yao; Conway, William; Maeder, Marcel; Feron, Paul
- Relation
- 12th International Conference on Greenhouse Gas Control Technologies (GHGT-12). Energy Procedia: Volume 63 (Austin, TX 5-9 October, 2014) p. 773-780
- Publisher Link
- http://dx.doi.org/10.1016/j.egypro.2014.11.086
- Publisher
- Elsevier
- Resource Type
- conference paper
- Date
- 2014
- Description
- 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°C. It has been found that NH₃ neutralized amino acids solutions can enhance KG 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.
- Subject
- NH₃; neutralized amino acids solutions; NH₃ vapour loss; K<sub>G</sub> of CO₂; chemical equilibrium model
- Identifier
- http://hdl.handle.net/1959.13/1293513
- Identifier
- uon:18618
- Identifier
- ISSN:1876-6102
- Language
- eng
- Full Text
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