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Chemical Modeling of Nesquehonite Solubility in Li plus Na + K + NH4 + Mg + Cl + H2O System with a Speciation-based Approach
Alternative TitleChin. J. Chem. Eng.
Wang Daoguang; Li Zhibao
2012-04-01
Source PublicationCHINESE JOURNAL OF CHEMICAL ENGINEERING
ISSN1004-9541
Volume20Issue:2Pages:267-276
AbstractA 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. MgCO30, MgHCO3+, 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/CO32- bearing species distribution, activity coefficient and pH changes.; 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. MgCO30, MgHCO3+, 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/CO32- bearing species distribution, activity coefficient and pH changes.
KeywordChemical Modeling Speciation Equilibrium Nesquehonite Solubility
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
URL查看原文
Indexed BySCI
Language英语
WOS KeywordMOLAL THERMODYNAMIC PROPERTIES ; MINERAL SOLUBILITIES ; NA-K-MG-CA-H-CL-SO4-OH-HCO3-CO3-CO2-H2O SYSTEM ; LOW-TEMPERATURES ; NATURAL-WATERS ; CARBONIC-ACID ; DOUBLE SALTS ; STABILITY ; 25-DEGREES-C ; PREDICTION
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000304292000009
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6278
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wang Daoguang,Li Zhibao. Chemical Modeling of Nesquehonite Solubility in Li plus Na + K + NH4 + Mg + Cl + H2O System with a Speciation-based Approach[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2012,20(2):267-276.
APA Wang Daoguang,&Li Zhibao.(2012).Chemical Modeling of Nesquehonite Solubility in Li plus Na + K + NH4 + Mg + Cl + H2O System with a Speciation-based Approach.CHINESE JOURNAL OF CHEMICAL ENGINEERING,20(2),267-276.
MLA Wang Daoguang,et al."Chemical Modeling of Nesquehonite Solubility in Li plus Na + K + NH4 + Mg + Cl + H2O System with a Speciation-based Approach".CHINESE JOURNAL OF CHEMICAL ENGINEERING 20.2(2012):267-276.
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