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Absorption of carbon dioxide in ethylenediamine solutions ii. pilot plant study of absorption and regeneration
Author(s) -
Trass Olev,
Weiland R. H.
Publication year - 1971
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450490611
Subject(s) - stripping (fiber) , reboiler , absorption (acoustics) , carbon dioxide , chemistry , ethylenediamine , mass transfer , decomposition , analytical chemistry (journal) , inorganic chemistry , materials science , chromatography , organic chemistry , composite material , distillation
Abstract Carbon dioxide removal by aqueous ethylenediamine has been studied in 4‐inch diameter absorption and stripping columns packed with 1/2‐inch Intalox saddles Mass transfer coefficients for absorption were appreciably gas phase controlled and three to four times greater than those for caustic soda. Film theory predictions reproduced the absorption data to within 20% or better Equilibrium data were obtained by using the stripping column reboiler as an equilibrium stage. The enthalpy and rate of carbamate decomposition were inferred from these results, and transfer unit heights were determined for stripping The economics of this process are unfavourable because of the high steam demand and suggest that regeneration equilibria alone can be used for the rough evaluation of new chemical absorbents