TITLE:
Thermal Characterization and Lifetime Estimation of the Humus Lombricospt
AUTHORS:
Tulio Andres Florez, Gladis Miriam Aparicio
KEYWORDS:
Thermal Analysis; Thermogravimetry (TGA); Differential Scanning Calorimetry (DSC); Mass Spectrometry (MS); Activation Energy; Decomposition Kinetics; Humus
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.5 No.2,
January
17,
2014
ABSTRACT:
Through this study, the humus produced in the breeding place of Universidad Autonoma de Occidente
was thermally characterized. The humus was submitted to a heating program controlled by the Differential
Scanning Calorimetry (DSC) technique to characterize the type of transition,
Thermogravimetry (TGA) to study the equilibrium of phasesand Mass Spectrometry (MS) coupled to
TGA to identify detached elements in a temperature range. The temperature
range used in this study was 30℃ ℃. The energy required
for the water desorption in the humus has been found in this study. The humus
showed a quick desorption between 30℃ ≤ TDesorption ≤ 110℃ at a
heating rate of 10℃/min and presented decomposition around 250℃. Moreover,
the kinetics of the desorption of the humus was studied to obtain the activation
energy three TGA measures for three different heating rates. The average
activation energy was about 26 kJ/Mol. This result was carried out to obtain an
estimation of the desorption time of water in the range from room temperature
to the decomposition temperature around 350℃.