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Activation energy calculation from a linearly‐increasing‐temperature experiment
Author(s) -
Ingraham T. R.,
Marier P.
Publication year - 1964
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450420406
Subject(s) - absolute zero , activation energy , kinetic energy , logarithm , decomposition , thermodynamics , linear relationship , thermal decomposition , chemistry , analytical chemistry (journal) , kinetics , calorie , materials science , mathematics , chromatography , statistics , physics , organic chemistry , mathematical analysis , quantum mechanics
A simplified method has been developed for the determination of the activation energy of a heterogeneous reaction having linear kinetics. The thermal decomposition of calcium carbonate has been used as an example and it has been shown that when the logarithm of the weight loss per unit area of powder compacts is plotted against the reciprocal of absolute temperature, for a run done with a linear heating rate, a linear relationship is obtained. When the logarithms of the heating rate and the absolute temperature are included, results for a variety of heating rates can be completely correlated. Heating rates of less than 5 degrees per minute are recommended. An activation energy of 48.4 ± 2 kilocalories per mole has been estimated for the decomposition reaction and 7 ± 3 kilocalories per mole for the formation reaction.