Prediction of the Flash Point of Binary and Ternary Liquid Mixtures Using Liaw Method and Different Activity Coefficient Models

Document Type : Research Paper

Authors

1 Department of Chemical Engineering, Mazandaran university of science and technology, Behshahr, Iran

2 Department of Chemical Engineering, KwaZulu-Natal University, Durban, South Africa

Abstract

Flash point is measured experimentally for a pure liquid, but this temperature is measured for multi-component mixtures in specific concentrations. Therefore, a model should be presented to estimate the aforementioned temperature for liquid mixtures over wide ranges of concentrations. In this communication, closed cup flash points of binary mixtures (Water+ Methanol, Water+ Ethanol, Octane+ Heptane, Octane+ Dodecane, Nonane+ Decane, nonane+ dodecane+ acetic acid+ pentan-1-ol, acetic acid+ n-hexanol, , pentan-1-ol+ cyclohexanon, acetic acid+ Cyclohexanon, n-Hexanol+ Cyclohexanon) and ternary mixtures (Octane+ Decane+ Dodecane, Nonane+ Decane+ Dodecane, Acetic acid+ n-Hexanol+ Cyclohexanon ) have been calculated using Liaw method for different state of  ideal and non-ideal solutions. For non-ideal solutions, different activity coefficient models (NRTL, Wilson, Margules) have been used. Finally, results of the present models for both binary and ternary systems are compared with experimental data. Except Octane + Heptane binary mixture with Wilson activity coefficient model, other binary and ternary systems have been indicated good result prediction, and NRTL model with 2.64 AAD% had the better results. Due to the observed results, two mixtures Water+ Methanol and Water+ Ethanol are non-ideal intensively.
 

Keywords

References

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Journal of Petroleum Research
Volume 29, Issue 109 - Serial Number 109
March and April 2020
Pages 132-143

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