Chemical Modeling of Nesquehonite Solubility in Li+Na+K+NH<sub>4</sub>+Mg+Cl+H<sub>2</sub>O System with a Speciation-based Approach

王道广; 李志宝

doi:10.1016/S1004-9541(12)60388-7

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Chemical Modeling of Nesquehonite Solubility in Li+Na+K+NH₄+Mg+Cl+H₂O System with a Speciation-based Approach

CHEMICAL ENGINEERING THERMODYNAMICS | Updated：2026-01-06

- Chemical Modeling of Nesquehonite Solubility in Li+Na+K+NH₄+Mg+Cl+H₂O System with a Speciation-based Approach
- Chinese Journal of Chemical Engineering Vol. 20, Issue 2, Pages: 267-276(2012)
- Affiliations：
  
  Key Laboratory of Green Process and Engineering, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(12)60388-7
  CLC：
- Published：2012
- Accepted：
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+Mg+Cl+H
DOI：

+Mg+Cl+H DOI： 10.1016/S1004-9541(12)60388-7.

摘要

Abstract

A chemical model

based on Pitzer activity coefficient model

is developed with a speciation approach to describe the solubility and chemistry of nesquehonite in concentrated chloride solutions.The chemical equilibrium constants for nesquehonite and aqueous species

i.e.

MgCO

MgHCO

and MgOH

are precisely calculated as a function of temperature according to the Van’t Hoff equation by use of standard Gibbs free energy

standard formation enthalpy and heat capacity.The most recent solubility data are regressed to obtain new Pitzer parameters with good agreement.The predictive ability of the new model is improved significantly in comparison with previous models.The behavior of speciation chemistry for nesquehonite in various chloride media is explained through this modeling work on the basis of the Mg/CO

bearing species distribution

activity coefficient and pH changes.

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Chemical Modeling of Nesquehonite Solubility in Li+Na+K+NH4+Mg+Cl+H2O System with a Speciation-based Approach

DOI：10.1016/S1004-9541(12)60388-7

摘要

Abstract

关键词

Keywords

references

Chemical Modeling of Nesquehonite Solubility in Li+Na+K+NH₄+Mg+Cl+H₂O System with a Speciation-based Approach