The effects of sample size and heating rate on the kinetics of the thermal decomposition of CaCO3
1973; Elsevier BV; Volume: 6; Issue: 1 Linguagem: Inglês
10.1016/0040-6031(73)80007-3
ISSN1872-762X
AutoresP.K. Gallagher, David W. Johnson,
Tópico(s)Energetic Materials and Combustion
ResumoIsothermal and dynamic methods were used to study the rate of weight loss of CaCO3. Sample sizes were controlled in the range of 1–32 mg. The contracting area rate law proved universally applicable. A pronounced dependence of the activation enthalpy, pre-exponential term, and rate constant upon sample weight and heating rate was observed. This dependence is discussed primarily in terms of the effects of self-cooling and sample geometry. The concept of a unique activation energy is questioned.
Referência(s)