'VAPOR-LIQUID' EQUILIBRIUM AND PARTITION COEFFICIENTS OF N-PROPYLMERCAPTAN, N-BUTYLMERCAPTAN AND DI- METHYLSUIFIDE IN MDEA / DEA AQUEOUS SOLUTIONS

摘要

The most commonly used solvent systems for acid gases treatment from a variety of gas streams are MDEA/ DEA and mixture of MDEA-DEA aqueous solutions due to their capability of dissolving the acid gases through non reactive and reactive interactions. Aqueous amines in particular can also react with organic sulfur species through acid base neutralization reaction while forming thermally regenerable salts. This investigation was carried out to provide "vapor-liquid" equilibrium data and Partition coefficients of n-Propylmercaptan, n-Butylmercaptan and Dimethylsulfide in n-Methyldiethanolamine (MDEA) and Diethanolamine (DEA) aqueous solutions. Measurements were made in the presence/absence of acid gases, H_2S and/or CO_2. The total pressure is around 7 MPa and the temperature range from 365.15 to 333.15 K.