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Measuring the amount of crystallinity in solutions using DSC
Author(s) -
Coutinho João A. P.,
Calange Sandra,
RuffierMeray Veronique
Publication year - 1997
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450750610
Subject(s) - differential scanning calorimetry , crystallinity , enthalpy , thermodynamics , measure (data warehouse) , crystallization , materials science , fraction (chemistry) , simple (philosophy) , calorimetry , melting point , biological system , analytical chemistry (journal) , chemistry , computer science , data mining , chromatography , physics , composite material , philosophy , epistemology , biology
The amount of solid that forms in a solution at temperatures below the cloud point, is an important quantity in the design of crystallisation processes. A new method using differential scanning calorimetry (DSC) to measure the fraction of crystallised solution, α solution S' is proposed. A very good agreement is obtained between the data measured by the new calorimetric method and using alternative techniques. A simple graphic version of the calculation procedure is also presented. It is shown to produce quick and fair estimates for the solid fraction by a simple analysis of a plot of enthalpy variation with temperature.