A two-parameter Margules method for modelling the thermodynamic mixing properties of albite-water melts

1992 ◽  
Vol 83 (1-2) ◽  
pp. 423-428 ◽  
Author(s):  
James G. Blencoe
Keyword(s):  
Phase Equilibrium ◽  
Phase Relations ◽  
Phase Equilibrium Data ◽  
Excess Enthalpies ◽  
Calorimetric Data ◽  
Mixing Properties ◽  
Modelling Method ◽  
Equilibrium Data ◽  
Two Parameter ◽  
Good Agreement

ABSTRACTA two-parameter Margules method has been developed for modelling the thermodynamic mixing properties and hypersolidus phase relations of albite-water (ab-w) melts. The method is based largely on phase-equilibrium and calorimetric data that are either currently available or readily obtainable; P-V-T data are not required.The new modelling method has been applied to calculate: (1) thermodynamic mixing properties for ab-w melts at 2-5 kbar, 815°C; and (2) hypersolidus phase relations for the ab-w system at 2·5 kbar. Results are uniformly positive—activity-composition relations are similar to those predicted by equations based on P-V-T data, excess enthalpies are in good agreement with data obtained from calorimetry, and calculated phase relations are fully compatible with phase-equilibrium data for ab-w melts acquired at 2·5 kbar.It is concluded that the Margules method for thermodynamic modelling of ab-w melts is a practical alternative to the P-V-T modelling method.

Thermodynamic investigation of hydrate-based CO2 capture from simulated flue gas with new mixed promoters

2021 ◽  
Vol 19 (1) ◽  
pp. 75-85
Author(s):  
Jing Bai ◽  
Canwei Cheng ◽  
Yuanxia Wei ◽  
Kele Yan ◽  
Pan Li ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Phase Equilibrium ◽  
Flue Gas ◽  
Experimental Results ◽  
Ammonium Bromide ◽  
Phase Equilibrium Data ◽  
Absolute Deviation ◽  
Equilibrium Data ◽  
Robinson Equation ◽  
Good Agreement

Abstract CO2 hydrate-based desalination (CHBD) has been developing for decades to meet the global demands of decreasing carbon dioxide (CO2) emissions. In this work, the CO2 was captured from the simulated flue gas which consists of 18.30 mol% carbon dioxide and 81.70 mol% nitrogen in the presence of tetra-n-butyl ammonium bromide (TBAB) + cyclopentane (CP) + glucoamylase. Then the phase equilibrium data of CO2 hydrate were measured by the method of isochoric pressure-search. Among the seven cases with same concentration of TBAB (0.29 mol%) and CP (5.00 vol%) and different glucoamylase proportions (ranging from 0.00 to 20.00 wt%), the optimum concentration of glucoamylase in the mixed promoters was 3.00 wt%. The phase equilibrium data was calculated by the modified van der Waals–Platteeuw (vdW–P) model with a modification of vapor pressure of water in the empty hydrate lattice. The Peng–Robinson equation of state was used to calculate the fugacity of gas. The maximum average absolute deviation was 4.09% between the calculated results and the experimental results. It revealed that the calculated results were in good agreement with the experimental results.

Phase equilibrium data and thermodynamic modeling of the system propane+NMP+methanol at high pressures

2010 ◽  
Vol 55 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Rafael M. Charin ◽  
Marcos L. Corazza ◽  
Papa M. Ndiaye ◽  
Marcio A. Mazutti ◽  
J. Vladimir Oliveira
Keyword(s):  
Phase Equilibrium ◽  
Thermodynamic Modeling ◽  
High Pressures ◽  
Phase Equilibrium Data ◽  
Equilibrium Data

An assessment test for phase equilibrium data of water soluble and insoluble clathrate hydrate formers

2013 ◽  
Vol 360 ◽  
pp. 68-76 ◽  
Author(s):  
Poorandokht Ilani-Kashkouli ◽  
Saeedeh Babaee ◽  
Farhad Gharagheizi ◽  
Hamed Hashemi ◽  
Amir H. Mohammadi ◽  
...  
Keyword(s):  
Phase Equilibrium ◽  
Clathrate Hydrate ◽  
Water Soluble ◽  
Phase Equilibrium Data ◽  
Equilibrium Data

High-pressure phase equilibrium data for carbon dioxide + dichloromethane + acetone and carbon dioxide + dichloromethane + acetone + N-acetylcysteine (NAC)

2018 ◽  
Vol 473 ◽  
pp. 132-137 ◽  
Author(s):  
Evertan A. Rebelatto ◽  
Gean Pablo S. Aguiar ◽  
Angelo L. Piato ◽  
João P. Bender ◽  
Marcelo Lanza ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Phase Equilibrium ◽  
High Pressure Phase ◽  
Phase Equilibrium Data ◽  
Equilibrium Data ◽  
Pressure Phase
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