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7424430 
Journal Article 
Carbamate stability measurements in amine/CO2/water systems with Nuclear Magnetic Resonance (NMR) spectroscopy 
Ciftja, AF; Hartono, A; Svendsen, HF 
2014 
Yes 
Energy Procedia
ISSN: 1876-6102 
Elsevier Ltd 
Energy Procedia 
63 
633-639 
English 
WOS:000361211500065 
NMR experiments were carried out for 30 mass % aqueous solutions of monoethanolmine (MEA), ethylenediamine (EDA) and piperazine (PZ) at 25 °C. To distinguish between the amine/protonated amine and bicarbonate/carbonate pairs, an earlier method developed for primary amine (2-amino-2-methyl-1-propanol) was implemented. The amine protonation constant, the dissociation constant of carbonic acid from literature, and pH measurements for different ionic strengths, were all employed and the data were correlated with ionic strength. © 2014 The Authors. Published by Elsevier Ltd. 
diamine; NMR; carbamate; CO2 capture 
Herzog H. 
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