Journal
JOURNAL OF CHEMICAL AND ENGINEERING DATA
Volume 59, Issue 11, Pages 3805-3813Publisher
AMER CHEMICAL SOC
DOI: 10.1021/je500680q
Keywords
-
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Natural Resources Canada (NRCan)
- Canadian Foundation for Innovation (CFI)
- Petroleum Technology Research Centre (PTRC)
- International Test Center for Carbon Dioxide Capture (ITC, University of Regina)
Ask authors/readers for more resources
The dissociation constants of the conjugate acids of 14 amines (diethylethanolamine, monoethanolamine, n-butyldiethanolamine, t-butyldiethanolamine, n,n-dimethylpropanolamine, methyl-diethanolamine, ethyldiethanolamine, monoethylethanolamine, n,n-dimethylisopropanolamine, triethanolamine, 4-methylpiperazine-1-amine, 3-morpholino propylamine, 4,2-hydroxylethylmorpholine, and triethylamine) were measured over a temperature range between 293.15 and 333.15 K using the potentiometric titration method. The change in standard state thermodynamic properties was derived from the vant Hoff equation. The influence of the steric hindrance, number of -OH groups, and length of alkyl chain on the dissociation constants was identified. Of the studied amines, few sterically hindered derivatives of piperazine, a secondary amine monoethylethanolamine, and a tertiary amine n,n-dimethylpropanolamine have high pK(a) values but lower standard enthalpy than those of the benchmark amine, monoethanolamine (MEA), and thus were deemed promising for CO2 capture technology. Monoethylethanolamine (MEEA) was found to have the highest basicity (pK(a)) with the lowest standard state enthalpy (Delta H degrees/kJ.mol(-1)).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available