INTRINSIC KINETICS OF THE THERMAL-DECOMPOSITION OF SODIUM-BICARBONATE

被引：20
|
作者：
WU, YL [1 ]
SHIH, SM [1 ]
机构：
[1] NATL TAIWAN UNIV,DEPT CHEM ENGN,TAIPEI,TAIWAN
来源：
THERMOCHIMICA ACTA | 1993年 / 223卷
关键词：
D O I：
10.1016/0040-6031(93)80132-T
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The intrinsic kinetics of the thermal decomposition of NaHCO3 to Na2CO3 has been studied by non-isothermal thermogravimetric analysis. NaHCO3 powder of 47 mum mean particle size was heated to decomposition at three constant heating rates (1.25, 2.5, and 5-degrees-C min-1) in flowing nitrogen. The range in which the decomposition occurred was about 360-450 K. A graphical method and Friedman's method were both used to analyze the experimental data: close agreement was obtained. The reaction rate showed a first-order dependence on the amount of unreacted NaHCO3 and the values for the activation energy and pre-exponential factor were 25.3 kcal mol-1 (105.8 kJ mol-1) and 6.7 X 10(12) min-1, respectively.
引用
收藏
页码：177 / 186
页数：10
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