Universiti Teknologi Malaysia Institutional Repository

Numerical estimation of moisture content in spray dried juice powder

Aliyu Bello, A. and Ahmad, Arshad and Ripin, Adnan and Oladokun, Olagoke (2016) Numerical estimation of moisture content in spray dried juice powder. Jurnal Teknologi, 78 (8-3). pp. 65-70. ISSN 0127-9696

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Abstract

The moisture contents of powders is an important parameter that affects the quality and commercial value of spray dried products. The utility of predicted moisture content values from two droplet drying models were compared with experimental data for spray dried pineapple juice, using the Ranz-Marshal and its modified variants for the heat and mass transfer correlations. The droplet Diffusion model, using the Zhifu correlation, gave estimates with errors of about 8 at 165 °C, 9 at 171 °C, 26 at 179 °C and 2 at 185 °C. The Ranz-Marshal correlation also gave comparable results with this model while results using the Downing and modified Ranz-Marshall correlations widely diverged. The Energy balance model predicted completely dried juice particles, and short drying times, in contrast to the experimental data. The small error sizes of the Diffusion model improves on the wide error sizes of an earlier process model, making is useful as a first approximation choice, for spray drier design and simulation, especially for juices under comparable operating conditions.

Item Type:Article
Uncontrolled Keywords:Pineapple juice, Spray drying
Subjects:T Technology > TP Chemical technology
Divisions:Chemical Engineering
ID Code:71212
Deposited By: Siti Nor Hashidah Zakaria
Deposited On:15 Nov 2017 04:05
Last Modified:15 Nov 2017 04:05

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