ZIB

Treffer pro Seite

Treffer 1 - 2 | 2 Treffer

Sortierung

Digitale Medien

Determination of the Kinetic Parameters of Chemical Reactions on the Basis of Non-Isothermal Measurements A critical review (1998)

Małecki, A. ; Prochowska-Klisch, B. ; Wojciechowski, K. T.

Springer

Journal of thermal analysis and calorimetry 54 (1998), S. 399-406

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1572-8943

Schlagwort(e): activation energy ; kinetics ; non-isothermal measurements

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Abstract A detailed analysis is presented of the applicability of several dependences commonly used for the determination of activation energies from non-isothermal measurements. Reactions proceeding according to different kinetic equations are simulated and the validity of the activation energy values obtained is discussed. The general conclusion is drawn that none of the examined dependences should be used to determine the activation energy. For a rough estimation of activation energy, the Kissinger equation can be applied according to Ockham's razor.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1010143019676

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

Another Approach to the Modified Zhuravlev Equation on the Basis of the Oxidation of V2O4 and V6O13 (1998)

Małecki, A. ; Prochowska-Klisch, B. ; Gajerski, R.

Springer

Journal of thermal analysis and calorimetry 54 (1998), S. 25-34

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1572-8943

Schlagwort(e): activation energy ; kinetic equation ; oxidation ; vanadium oxides ; Zhuravlev equation

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Abstract It has been found that the modified Zhuravlev equation, [(1−α)−1/3−1]2=ktn, which describes the kinetics of oxidation of V2O4 and V6O13 in the temperature range 820–900 K and in the oxygen pressure range 1.0–20 kPa, can be derived via the assumption that the changes in the observed activation energy result from the changing contributions of the two diffusion processes controlling the reaction rate. The values of the observed activation energy are in the range 160–175 kJ mol−1 for V2O4 and 188–201 kJ mol−1 for V6O13 in the scope of the experimental oxygen pressures and temperatures and conversion degrees of 0.1–0.9.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1010144213799

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Treffer 1 - 2 | 2 Treffer