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The absorption of CO2 by amine-potash solutions

✍ Scribed by S.S. Laddha; P.V. Dancwerts

Publisher: Elsevier Science
Year: 1982
Tongue: English
Weight: 236 KB
Volume: 37
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(82)85024-0

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✦ Synopsis

CO, has been absorbed in a stirred vessel into aqueous solutions of MEA and DEA containing K&O,, KZSOI and Na2S04 at 25" and 11°C. While electrolytes in general appear to increase the rate of reaction between CO2 and both MEA and DEA, K*CO, increases the rate of reaction of DEA much more than that of MEA. The addition of K2C03 to solutions of DEA increases the absorption rate, in spite of the decrease in the solubility and diffusivity of CO,. The observations help to explain why DEA is an effective promoter for the absorption and desorption of CO2 by hot. concentrated potash solutions.

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