Carbon dioxide absorption into promoted carbonate solutions | Zendy

Tseng P. C. | Zendy; Ho W. S. | Zendy; Savage D. W. | Zendy

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Carbon dioxide absorption into promoted carbonate solutions

Author(s) -

Tseng P. C.,

Ho W. S.,

Savage D. W.

Publication year - 1988

Publication title -

aiche journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.958

H-Index - 167

eISSN - 1547-5905

pISSN - 0001-1541

DOI - 10.1002/aic.690340604

Subject(s) - zwitterion , carbonate , chemistry , diethanolamine , carbon dioxide , absorption (acoustics) , amine gas treating , carbonate ion , inorganic chemistry , organic chemistry , materials science , molecule , composite material

CO 2 absorption rates into diethanolamine (DEA)‐promoted carbonate solutions were measured over a wide range of carbonate conversions and temperatures. Analysis of the data showed that the CO 2 ‐DEA reaction rate was controlled by the rate of formation of zwitterion intermediate for carbonate conversions below 30%, and was controlled by the rate of abstraction of proton from the zwitterion intermediate for carbonate conversions greater than 30%. Hydroxyl ion, free amine, and carbonate ion were identified to act as bases to abstract the proton from the zwitterion. The modeling of the CO 2 absorption rates and the effects of carbonate conversion and amine concentration on the CO 2 ‐DEA reaction kinetics were investigated.

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