Thermodynamic Properties of Aqueous Magnesium Chloride Solutions from 250 to 600 K and to 100 Mpa

By Wang, Peiming

Book Id: WPLBN0000655829
Format Type: PDF eBook:
File Size: 2.04 MB
Reproduction Date: 2005

Title:	Thermodynamic Properties of Aqueous Magnesium Chloride Solutions from 250 to 600 K and to 100 Mpa
Author:	Wang, Peiming
Volume:
Language:	English
Subject:	Technology., Reference materials, Technology and literature
Collections:	Techonology eBook Collection
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Citation APA MLA Chicago Wang, B. P. (n.d.). Thermodynamic Properties of Aqueous Magnesium Chloride Solutions from 250 to 600 K and to 100 Mpa. Retrieved from http://gutenberg.cc/

Description
Technical Reference Publication

Excerpt
Introduction: A knowledge of thermodynamic properties of aqueous solutions of magnesium chloride is of great interest from both theoretical and practical standpoints. MgC12 is a typical example of the 2-1 charge-type electrolytes and is an important component in many natural and industrial waters. Pressurized high-temperature waters containing dissolved magnesium chloride are encountered in the deep earth and ocean as well as in electric power plants where water of various degrees of purity is the heat transfer fluid. Understanding various geochemical processes and industrial problems requires a thorough knowledge of thermodynamic properties of aqueous electrolyte solutions including those of of thermodynamic properties of aqueous solutions of MgC12 and other alkaline-earth metal chlorides has been made by Holmes et al. 1-3 from 255 to 523 K and to pressures of 100 MPa and molalities of 6.17 mol K-I. The model gives an excellent representation of thermodynamic properties for these electrolyte solutions.

Table of Contents
Contents List of Tables 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 972 Literature sources for properties 2. Thermodynamic Properties of MgC12(aq). . . . . . . . 973 of aqueous MgC12 solutions.. . . . . . . . . . . . . . . . . . 2.1. Description of Equations. . . . . . . . . . . . . . . . . 973 2. Parameters for Eqs. (28)-(35). . . . . . . . . . . . . . . . . 2.2. Literature Sources for Thermodynamic 3. Summary of data regression for experimental results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Properties.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 974 4. Calculated osmotic coefficients of MgC12(aq) at 2.3. Temperature and Pressure Dependencies of saturation pressures using Eq. (6) and parameters the Ion-Interaction Parameters. . . . . . . . . . . . . 974 in Table 2.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3. Results of Data Analysis. . . . . . . . . . . . . . . . . . . . . 976 5. Calculated In y, of MgCl,(aq) at saturation 3.1. The Overall Fit. . . . . . . . . . . . . . . . . . . . . . . . . 976 pressures using Eq. (1 1) and parameters in 3.2. Volumetric Results. . . . . . . . . . . . . . . . . . . . . . 976 Table2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3. Osmotic Coefficient Results. . . . . . . . . . . . . . . 978 6. Calculated Lg of MgC12(aq) at various 3.4. Enthalpy of Dilution Results.. . . . . . . . . . . . . 982 temperatures and pressures using Eq. (16) and 3.5. Heat Capacity Results.. . . . . . . . . . . . . . . . . . . 983 parameters in Table 2. . . . . . . . . . . . . . . . . . . . . . . . 3.6. Comparison with Holmes et al. Model. . . . . . 983 7. 'p.4, of MgC12(aq) at 4. Discussion.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 988 temperatures and pressures using Eq. (17) and 4.1. Uncertainties in Ion Association and parameters in Table 2.. . . . . . . . . . . . . . . . . . . . . . . 8. Calculated V4 of MgC12(aq) at various Hydrolysis Constants. . . . . . . . . . . . . . . . . . . . 988 temperatures and pressures using Eq. (18) and 4.2. Relationship to Solid Properties.. . . . . . . . . . . 990 parameters in Table 2.. . . . . . . . . . . . . . . . . . . . . . . 5. Acknowledgments.. . . . . . . . . . . . . . . . . . . . . . . . . 990 6. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 991