Exothermic reactivities of skim and whole milk powders as measured using a novel procedure

被引:19
作者
Chong, LV [1 ]
Shaw, IR [1 ]
Chen, XD [1 ]
机构
[1] UNIV AUCKLAND, DEPT CHEM & MAT ENGN, FOOD SCI & PROCESS ENGN GRP, AUCKLAND, NEW ZEALAND
关键词
D O I
10.1016/S0260-8774(96)00043-X
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The activation energies of a whole and a skim milk powder were determined using an experimental technique devised from the transient model of self-heating proposed in a recent paper. Two activation energies were found for the whole milk powder which suggested that different reaction mechanisms took place at different temperature ranges. The first mechanism in the 130-145 degrees C temperature range had an activation energy of 203.2 kJ/mol. The second mechanism in the temperature range of 145-165 degrees C had an activation energy of 74.7 kJ/mol which was within the literature values for oxidation. The activation energy of skim milk powder was found to be 97.1 kJ/mol. Comparison of results from the current study was made with literature. The advantages of the new experimental method were discussed. Copyright (C) 1996 Elsevier Science Limited
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页码:185 / 196
页数:12
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