NMR studies of mixed amines

被引：28

作者：

Ballard, Mat ^{[1
]}

Bown, Mark ^{[1
]}

James, Susan ^{[1
]}

Yang, Qi ^{[1
]}

机构：

[1] CSIRO Mat Sci & Engn, Energy Transformed Flagship, Clayton, Vic 3168, Australia

来源：

10TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES | 2011年 / 4卷

关键词：

carbon dioxide; amine; absorption; NMR; C-13; kinetics; competition; CARBON-DIOXIDE ABSORPTION; ACTIVATED METHYLDIETHANOLAMINE; MASS-TRANSFER; KINETICS; CO2; BLENDS;

D O I：

10.1016/j.egypro.2011.01.054

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

H-1 and quantitative C-13 NMR spectroscopy was used to study the reaction of CO2 with mixed aqueous amines. This technique permits the measurement of carbamates of each amine and bicarbonate concentrations as a function of time (and loading). The ratio of the amount of each carbamate formed (for primary and secondary amines) is shown to be thermodynamically rather than kinetically controlled, due a rapid exchange reaction between amine and carbamate. This exchange reaction is the likely basis of the "shuttle" mechanism of rate enhancement in mixed amines. (C) 2010 Published by Elsevier Ltd.

引用

页码：291 / 298

页数：8

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