Prediction of dry mass glass transition temperature and the spray drying behaviour of a concentrate using a desorption method

P. Zhu S. Mejean E. Blanchard Romain Jeantet 1 P. Schuck
1 STLO - Science et Technologie du Lait et de l'Oeuf
Abstract : A predictive tool (SD(2)P (R)) based on a drying by desorption method was recently developed in order to determine the key process parameters values prior to spray drying. However, the SD(2)P (R) software cannot currently take into account the risk of stickiness during the process. In the study reported here, new standardized desorption method was tested and with this new method an equation was proposed to evaluate the dry glass transition temperature (T(g)) of a concentrate according to its total solid content, its viscosity and its average evaporation rate. The concentrate's behaviour during spray drying could then be predicted on the basis of the Tg. Four validation experiments were performed using different infant formula samples
Keywords : Desorption Water transfer Glass transition Viscosity Spray drying Infant formula differential scanning calorimetry skim milk powder dairy powders water activity carbohydrate solutions phase-transitions rubber transition thermal-behavior moisture tool
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Journal articles
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Submitted on : Friday, September 7, 2012 - 3:31:15 PM
Last modification on : Wednesday, March 21, 2018 - 4:08:07 PM

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AGROCAMPUS-OUEST | UNAM | INRA | AGROCAMPUS-OUEST-UMR-STLO

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P. Zhu, S. Mejean, E. Blanchard, Romain Jeantet, P. Schuck. Prediction of dry mass glass transition temperature and the spray drying behaviour of a concentrate using a desorption method. Journal of Food Engineering, Elsevier, 2011, 105 (3), pp.460-467. ⟨10.1016/j.jfoodeng.2011.03.003⟩. ⟨hal-00729296⟩

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