The absorption of CO2 by amine-potash solutions |
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| Authors: | SS Laddha PV Dancwerts |
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| Affiliation: | Department of Chemical Engineering, Pembroke St., Cambridge CB2 3RA, England |
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| Abstract: | CO2 has been absorbed in a stirred vessel into aqueous solutions of MEA and DEA containing K2CO3, K2SO4 and Na2SO4 at 25° and 11°C. While electrolytes in general appear to increase the rate of reaction between CO2 and both MEA and DEA, K2CO3 increases the rate of reaction of DEA much more than that of MEA. The addition of K2CO3 to solutions of DEA increases the absorption rate, in spite of the decrease in the solubility and diffusivity of CO2. 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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| Keywords: | Author to whom correspondence should be addressed |
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