A Study on Equilibrium Solubility for Carbon Dioxide in Methyldiethanolamine−Piperazine−Water Solution

Solubilities of CO2 in aqueous mixtures of methyldiethanolamine (MDEA) and piperazine (PZ) have been measured for temperatures and CO2 partial pressures ranging from 30 to 90 °C and 13.16 to 935.3 kPa, respectively. A modified Deshmukh−Mather thermodynamic model is used to correlate the experimental...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 1999-10, Vol.38 (10), p.4032-4036
Main Authors: Liu, Hua-Bing, Zhang, Cheng-Fang, Xu, Guo-Wen
Format: Article
Language:English
Subjects:
03 NATURAL GAS
AMINES
AQUEOUS SOLUTIONS
CARBON DIOXIDE
Chemistry
Exact sciences and technology
General and physical chemistry
MATHEMATICAL MODELS
NATURAL GAS
PIPERAZINES
SCRUBBING
SOLUBILITY
Solutions
SOLVENT PROPERTIES
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Summary:Solubilities of CO2 in aqueous mixtures of methyldiethanolamine (MDEA) and piperazine (PZ) have been measured for temperatures and CO2 partial pressures ranging from 30 to 90 °C and 13.16 to 935.3 kPa, respectively. A modified Deshmukh−Mather thermodynamic model is used to correlate the experimental data with the average deviation of 9.8%, in which the effect of salts on Henry's constant is taken into consideration. The results also indicate that the second-order dissociation reaction for piperazine can be neglected. A simple model is also given with the average deviation of 11.6%.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie990113v