Mutual solubility of binary mixtures of octadecane with diethanolamine and bis-hydroxyethyl piperazine

1996 ◽  
Vol 123 (1-2) ◽  
pp. 259-270 ◽  
Author(s):  
M. Abedinzadegan ◽  
A. Meisen
Keyword(s):  
Binary Mixtures ◽  
Mutual Solubility ◽  
Hydroxyethyl Piperazine

Phase Densities of Molten Binary Mixtures of Alkali Halogenides with Limited Mutual Solubility

2007 ◽  
Vol 62 (5-6) ◽  
pp. 303-308 ◽  
Author(s):  
Vera N. Lockett ◽  
Irina V. Rukavishnikova ◽  
Viktor P. Stepanov
Keyword(s):  
Critical Exponent ◽  
Critical Point ◽  
Binary Mixtures ◽  
Order Parameter ◽  
Mutual Solubility ◽  
Critical Behaviour ◽  
Density Measurements

The densities of binary mixtures of LiF with CsCl, KBr, RbBr, CsBr, KI, RbI and CsI have been investigated at 1093 - 1253 K. For the system LiF with KBr the dependence of the density on the temperature was measured up to the critical point, where the system became single-phased, and the critical behaviour was evaluated. The critical exponent of the order parameter, which was found from the density measurements, is close to 0.5.

scholarly journals Measurement and Thermodynamic Modeling for CO2 Solubility in the N-(2-Hydroxyethyl) Piperazine + Water System

2021 ◽  
Vol 9 ◽  
Author(s):  
Simeng Li ◽  
Gern Woo Kang ◽  
Jian Chen
Keyword(s):  
Thermodynamic Model ◽  
Water System ◽  
Mutual Solubility ◽  
Physical Parameters ◽  
Heat Of Reaction ◽  
Co2 Solubility ◽  
High Boiling Point ◽  
Amine System ◽  
Reaction Constants ◽  
Hydroxyethyl Piperazine

Amine scrubbing is the most important technique for capturing CO2. The cyclic diamine N-(2-Hydroxyethyl)-piperazine (HEPZ), a derivative of piperazine, with good mutual solubility in aqueous solution, a low melting point, and a high boiling point, has the potential to replace PZ as an activator added in the mixed amine system to capture CO2. In this study, the solubility of CO2 in aqueous HEPZ solutions was determined for three HEPZ concentrations and four temperatures. The VLE data for HEPZ-H2O were obtained using a gas–liquid double circulation kettle at pressure 30–100 kPa, and the thermodynamic model for the HEPZ-H2O-CO2 system was built in Aspen Plus based on the electrolytic non-random two-liquid (ENRTL) activity model. The physical parameters for HEPZ and the interaction parameters for ENRTL, along with reaction constants of carbamate reactions, were regressed. Using the thermodynamic model, the CO2 cyclic capacity, speciation with loading, and heat of reaction for the CO2 capture system by the aqueous HEPZ solution are predicted and analyzed.

Thermodynamic properties of binary mixtures containing thiaalkanes

1980 ◽  
Vol 77 ◽  
pp. 445-449 ◽  
Author(s):  
Zohra Ferhat-Hamida ◽  
Robert Philippe ◽  
Jean-Claude Merlin ◽  
V. Kehiaian
Keyword(s):  
Thermodynamic Properties ◽  
Binary Mixtures
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