Intrinsic kinetics of the thermal decomposition of sodium bicarbonate

Yee Lin Wu; Shin Min Shih

doi:10.1016/0040-6031(93)80132-T

Intrinsic kinetics of the thermal decomposition of sodium bicarbonate

Yee Lin Wu, Shin Min Shih

Department of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

The intrinsic kinetics of the thermal decomposition of NaHCO₃ to Na₂CO₃ has been studied by non-isothermal thermogravimetric analysis. NaHCO₃ powder of 47 μm mean particle size was heated to decomposition at three constant heating rates (1.25, 2.5, and 5° 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 kJmol^-1) and 6.7 × 10¹² min^-1, re- spectively.

Original language	English
Pages (from-to)	177-186
Number of pages	10
Journal	Thermochimica Acta
Volume	223
Issue number	C
DOIs	https://doi.org/10.1016/0040-6031(93)80132-T
Publication status	Published - 1993 Aug 28

All Science Journal Classification (ASJC) codes

Instrumentation
Condensed Matter Physics
Physical and Theoretical Chemistry

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title = "Intrinsic kinetics of the thermal decomposition of sodium bicarbonate",

abstract = "The intrinsic kinetics of the thermal decomposition of NaHCO3 to Na2CO3 has been studied by non-isothermal thermogravimetric analysis. NaHCO3 powder of 47 μm mean particle size was heated to decomposition at three constant heating rates (1.25, 2.5, and 5° 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 kJmol-1) and 6.7 × 1012 min-1, re- spectively.",

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doi = "10.1016/0040-6031(93)80132-T",

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AU - Wu, Yee Lin

AU - Shih, Shin Min

PY - 1993/8/28

Y1 - 1993/8/28

N2 - The intrinsic kinetics of the thermal decomposition of NaHCO3 to Na2CO3 has been studied by non-isothermal thermogravimetric analysis. NaHCO3 powder of 47 μm mean particle size was heated to decomposition at three constant heating rates (1.25, 2.5, and 5° 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 kJmol-1) and 6.7 × 1012 min-1, re- spectively.

AB - The intrinsic kinetics of the thermal decomposition of NaHCO3 to Na2CO3 has been studied by non-isothermal thermogravimetric analysis. NaHCO3 powder of 47 μm mean particle size was heated to decomposition at three constant heating rates (1.25, 2.5, and 5° 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 kJmol-1) and 6.7 × 1012 min-1, re- spectively.

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Intrinsic kinetics of the thermal decomposition of sodium bicarbonate

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