Kinetics of solid state thermal decomposition reactions

1989 ◽  
Vol 35 (4) ◽  
pp. 1267-1278 ◽  
Author(s):  
K. N. Ninan
Keyword(s):  
Thermal Decomposition ◽  
Solid State ◽  
Decomposition Reactions ◽  
Kinetics Of

scholarly journals The Thermal Decomposition Reactions of Bivalent Metal Succinates in the Solid State

1975 ◽  
Vol 48 (10) ◽  
pp. 2789-2792 ◽  
Author(s):  
Hiroko Yokobayashi ◽  
Kenzo Nagase ◽  
Kazuo Muraishi
Keyword(s):  
Thermal Decomposition ◽  
Solid State ◽  
Bivalent Metal ◽  
Decomposition Reactions

Study of NH4EuF4 in solid state reaction Eu2O3–NH4F. Thermal analyses, calorimetry, and decomposition kinetics

1977 ◽  
Vol 55 (14) ◽  
pp. 2628-2630 ◽  
Author(s):  
Krishnan Rajeshwar ◽  
Etalo A. Secco
Keyword(s):  
Thermal Decomposition ◽  
Solid State ◽  
Solid State Reaction ◽  
Thermal Analyses ◽  
Decomposition Kinetics ◽  
X Ray ◽  
Kinetics Of Thermal Decomposition ◽  
Heat Of Decomposition ◽  
Kinetics Of

The solid state reaction Eu2O3–NH4F leading to the formation of NH4EuF4 was studied by thermal analyses and X-ray diffraction.The heat of decomposition of NH4EuF4 and the kinetics of thermal decomposition of NH4EuF4 are reported.

scholarly journals Kinetics of the Thermal Decomposition of Rhodochrosite

Minerals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 34
Author(s):  
Iván A. Reyes ◽  
Mizraim Flores ◽  
Elia G. Palacios ◽  
Hernán Islas ◽  
Julio C. Juárez ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Mass Loss ◽  
Manganese Oxides ◽  
Absorption Spectrometry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Decomposition Reactions ◽  
Mass Losses ◽  
Rate Controlled ◽  
Kinetics Of

Manganese is a widely used element in the steel industry; its main source is a mineral named rhodochrosite (MnCO3). For industrial usage, rhodochrosite is reduced to different manganese oxides by means of nodulation furnaces. In this study, rhodochrosite was thermally analyzed at temperatures ranging from 100 °C to 1200 °C. XRD (Powder X-ray diffraction), XRF (X-ray fluorescence), AAS (Atomic Absorption Spectrometry), and FESEM-EDX (Field Emission Scanning Electron Microscopy-Energy Dispersive X-Ray Spectrometry) were used to characterize the mineral and the residues were analyzed by XRD and FTIR (Fourier-transform infrared spectroscopy) to determine the stoichiometry of the thermal decomposition reactions. Three mass losses were observed, the first attributed to the transformation from carbonate to manganese (III) oxide, the second to the reduction to manganese tetroxide, and the third to the decomposition of calcium carbonate (CaCO3) present as a contaminant in the studied mineral. Thermal decomposition kinetics shows that the first mass loss required 17.91 kJ mol−1, indicating a control by mass transport-controlled process. For the second and third mass loss, the apparent activation energy of 112.41 kJ mol−1 and 64.69 kJ mol−1 was obtained respectively, indicating that both mass loss events were rate-controlled.

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