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Flash Point Measurements and Modeling for Ternary Partially Miscible Aqueous­Organic Mixtures

Liaw, Horng-Jang and Gerbaud, Vincent and Wu, Hsuan-Ta Flash Point Measurements and Modeling for Ternary Partially Miscible Aqueous­Organic Mixtures. (2010) Journal of Chemical & Engineering Data, vol. 55 (n° 9). pp. 3451-3461. ISSN 0021-9568

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Official URL: http://dx.doi.org/10.1021/je100163q

Abstract

Flash point is the most important variable used to characterize the fire and explosion hazard of liquids. This paper presents the first partially miscible aqueousorganic mixtures flash point measurements and modeling for the ternary type-I mixtures, water + ethanol + 1-butanol, water + ethanol + 2-butanol, and the type-II mixture, water + 1-butanol + 2-butanol. Results reveal that the flash points are constant in each tie line. Handling the non-ideality of the liquid phase through the use of activity coefficient models, the general flash-point model of Liaw et al. extended to partially miscible mixtures predicts the experimental data well when using literature LLE and the VLE activity coefficient model binary parameters to estimate sequentially the span and flash point in each tie line and the flash point in the mutual solubility region, respectively. The constant flash-point behavior in a tie line is also observed and predicted, in agreement with the VLLE tie line property that a single vapor is in equilibrium with all liquid composition on a tie line. For the aqueousorganic mixtures here studied, a deviation between prediction and measurements is observed, arising from the failure of the constant lower flammable limit assumption in the mutual solubility inert-rich region. Potential application for the model concerns the assessment of fire and explosion hazards and the development of inherently safer designs for chemical processes containing partially miscible aqueousorganic mixtures.

Item Type:Article
Additional Information:Thanks to American Chemical Society editor. The definitive version is available at http://portal.acs.org/portal/acs/corg/content The original PDF of the article can be found at Journal of Chemical & Engineering Data website : http://pubs.acs.org/journal/jceaax
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > China Medical University (TAIWAN)
Laboratory name:
Department of occupational safety and health (Taichung,Taiwan)
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Procédés Systèmes Industriels (PSI) - Analyse fonctionnelle des Procédés
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Deposited By: Vincent GERBAUD

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