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AuthorMahmud N.
AuthorBenamor A.
AuthorNasser M.
AuthorEl-Naas M.H.
AuthorTontiwachwuthikul P.
Available date2020-04-25T01:02:21Z
Publication Date2019
Publication NameProcesses
ResourceScopus
ISSN22279717
URIhttp://dx.doi.org/10.3390/pr7020081
URIhttp://hdl.handle.net/10576/14464
AbstractReduction of carbon dioxide emission from natural and industrial flue gases is paramount to help mitigate its effect on global warming. Efforts are continuously deployed worldwide to develop efficient technologies for CO 2 capture. The use of environment friendly amino acids as rate promoters in the present amine systems has attracted the attention of many researchers recently. In this work, the reaction kinetics of carbon dioxide with blends of N-methyldiethanolamine and L-Arginine was investigated using stopped flow technique. The experiments were performed over a temperature range of 293 to 313 K and solution concentration up to one molar of different amino acid/amine ratios. The overall reaction rate constant (k ov ) was found to increase with increasing temperature and amine concentration as well as with increased proportion of L-Arginine concentration in the mixture. The experimental data were fitted to the zwitterion and termolecular mechanisms using a nonlinear regression technique with an average absolute deviation (AAD) of 7.6% and 8.0%, respectively. A comparative study of the promoting effect of L-Arginine with that of the effect of Glycine and DEA in MDEA blends showed that MDEA-Arginine blend exhibits faster reaction rate with CO 2 with respect to MDEA-DEA blend, while the case was converse when compared to the MDEA-Glycine blend.
SponsorThe authors thank Ahmed Soliman and Dan Jerry Cortes for providing laboratory support This paper was made possible by an NPRP Grant # 7-1154-2-433 from the Qatar National Research Fund (a member of Qatar Foundation).
Languageen
PublisherMDPI AG
SubjectCarbon dioxide
Kinetics
L-Arginine
N-methyldiethanolamine
Reaction
Stopped flow technique
TitleReaction kinetics of carbon dioxide in aqueous blends of N-methyldiethanolamine and L-arginine using the stopped-flow technique
TypeArticle
Issue Number2
Volume Number7
dc.accessType Open Access


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