Liquid–Liquid Equilibrium of Two-Phase Aqueous Systems Composed of PEG 400, Na2SO4, and Water at Different Temperatures and pH Values: Correlation and Thermodynamic Modeling

2018 ◽  
Vol 63 (5) ◽  
pp. 1352-1362 ◽  
Author(s):  
Rui Gomes Nascimento ◽  
Rafael da Costa Ilhéu Fontan ◽  
Renata Cristina Ferreira Bonomo ◽  
Cristiane Martins Veloso ◽  
Sérgio de Sousa Castro ◽  
...  
Keyword(s):  
Thermodynamic Modeling ◽  
Aqueous Systems ◽  
Liquid Equilibrium ◽  
Two Phase ◽  
Ph Values ◽  
Peg 400 ◽  
Different Temperatures

Liquid–Liquid Equilibrium Data and Thermodynamic Modeling for Aqueous Two-Phase System Peg 1500 + Sodium Sulfate + Water at Different Temperatures

2019 ◽  
Vol 64 (2) ◽  
pp. 810-816 ◽  
Author(s):  
Cláudia Lais Rodrigues Barreto ◽  
Sérgio de Sousa Castro ◽  
Evaldo Cardozo de Souza Júnior ◽  
Cristiane Martins Veloso ◽  
Lizzy Ayra Alcântara Veríssimo ◽  
...  
Keyword(s):  
Thermodynamic Modeling ◽  
Sodium Sulfate ◽  
Phase System ◽  
Liquid Equilibrium ◽  
Two Phase ◽  
Aqueous Two Phase System ◽  
Equilibrium Data ◽  
Different Temperatures

Liquid-Liquid Equilibria for Acetone + Several Citrates Aqueous Two-Phase Systems at Different Temperatures

2012 ◽  
Vol 549 ◽  
pp. 30-35
Author(s):  
Shi Ping Hu ◽  
Juan Han ◽  
Yong Sheng Yan ◽  
Yu Tao Hu
Keyword(s):  
Ternary Systems ◽  
Data Fitting ◽  
Potassium Citrate ◽  
Liquid Equilibrium ◽  
Two Phase ◽  
Different Temperatures ◽  
Tie Lines ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Tie Line

Liquid-liquid equilibria for the three kinds of the ternary systems acetone + ammonium, sodium or potassium citrate + water have been determined at T= (273.15, 283.15, and 298.15) K. Binodal curves, tie-lines, and integrated phase diagrams for the ternary systems are given. The data of the experimental bimodal curve are described with a four-parameter equation. The result also shows the temperature has little influence on the liquid-liquid equilibrium within the investigated range. The tie-line data calculated according to the bimodal data fitting equation and the lever arm rule were satisfactorily described by using the Othmer-Tobias and Bancroft equations, and the result conform the reliability of the calculation method and corresponding tie-line data.

scholarly journals Optimization of Gas-Water Absorption Equilibrium of Carbon Dioxide for Algae Liquors: Selection of Alkaline Buffering Chemicals

2016 ◽  
Vol 2016 ◽  
pp. 1-5
Author(s):  
Wen-Hsi Cheng ◽  
Ming-Shean Chou
Keyword(s):  
Carbon Dioxide ◽  
Sodium Carbonate ◽  
Egeria Densa ◽  
Optimal Conditions ◽  
Liquid Equilibrium ◽  
Ph Values ◽  
Carbonate Concentration ◽  
Different Temperatures ◽  
The Mean ◽  
Selection Of

The apparent Henry’s Law constant (H′), which quantifies the concentration partition of a gas-liquid equilibrium of carbon dioxide (CO2), is used to optimize the absorption of carbon dioxide in algae liquors. The values ofH′were examined under various conditions: in water at different temperatures (27 and 37°C), in alkaline buffering chemicals (sodium hydroxide (NaOH) and sodium carbonate (Na2CO3)), and in aquatic algae plants (Egeria densaandAnubias barteri nana). The optimal conditions for CO2absorption can be obtained by controlling the aqueous pH values (around weak alkalinity with pH 9-10) using sodium carbonate as an alkaline buffering chemical at 27°C, yielding exactH′values of around 16.3–21.3 atm/M, which were obtained from the mean gaseous CO2concentration of 803 ppm and the total aqueous carbonate concentration of 4.085 mg/L. The experimental results reveal that an alkaline buffering compound, sodium carbonate, can be added to water to maintain a constant aqueous alkalinity enough for the fixation of carbon dioxide by the photosynthesis of green algae in a photobioreactor.

Evaluation of salting-out effect in the liquid–liquid equilibrium of aqueous two-phase systems composed of 2-propanol and Na2SO4/MgSO4 at different temperatures

2017 ◽  
Vol 450 ◽  
pp. 184-193 ◽  
Author(s):  
Juliana Gomes Pimentel ◽  
Silvana Ferreira Bicalho ◽  
Olga Reinert Ramos Gandolfi ◽  
Lizzy Ayra Alcântara Verissimo ◽  
Sérgio de Sousa Castro ◽  
...  
Keyword(s):  
Liquid Equilibrium ◽  
Two Phase ◽  
Salting Out ◽  
Different Temperatures ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

Liquid–Liquid Equilibrium and Thermodynamic Modeling of Aqueous Two-Phase System Containing Polypropylene Glycol and NaClO4 at T = (288.15 and 298.15) K

2017 ◽  
Vol 47 (1) ◽  
pp. 1-25 ◽  
Author(s):  
Afshin Hamta ◽  
Asma Mohammadi ◽  
Mohammad Reza Dehghani ◽  
Farzaneh Feyzi
Keyword(s):  
Thermodynamic Modeling ◽  
Phase System ◽  
Polypropylene Glycol ◽  
Liquid Equilibrium ◽  
Two Phase ◽  
Aqueous Two Phase System

Correction to “Liquid–Liquid Equilibrium of Primary and Secondary Aqueous Two-Phase Systems Composed of Sucrose + Triton X-114 + Water at Different Temperatures”

2014 ◽  
Vol 59 (12) ◽  
pp. 4231-4231
Author(s):  
Subbarayalu Ramalakshmi ◽  
Ramakrishnan Nagasundara Ramanan ◽  
Arbakariya B. Ariff ◽  
Chien Wei Ooi
Keyword(s):  
Liquid Equilibrium ◽  
Two Phase ◽  
Different Temperatures ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Triton X
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