Hydrogen temperature programmed reduction based on water analysis
| Autor: | G. Delahay, D. Ballivet-Tkatchenko |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Reaction mechanism
Hydrogen Nucleation chemistry.chemical_element Thermodynamics 02 engineering and technology 010402 general chemistry Heterogeneous catalysis 01 natural sciences 0104 chemical sciences Volumetric flow rate Reduction (complexity) Reaction rate constant 020401 chemical engineering chemistry Physical chemistry 0204 chemical engineering Temperature-programmed reduction |
| Zdroj: | Journal of Thermal Analysis. 41:1141-1151 |
| ISSN: | 1572-8943 0368-4466 |
| DOI: | 10.1007/bf02547203 |
| Popis: | Profiles of temperature programmed reduction (TPR) of V2O5 under H2 have been studied through water analysis. This new approach enhances the sensitivity of the method. The influence of experimental parameters on the temperature corresponding to the maximum reduction rate,Tm, has been studied. The hydrogen concentration and heating rate are the two major factors that influenceTm. In our method, the amount of solid and the flow rate are also important factors in monitoring of profile distortions attributed to water condensation at the outlet of the reactor. An approach of the mechanism of reduction of V2O5 has been carried out. The best kinetic model which describes the reduction rocess is the Avrami-Erofeev tridimensional nucleation model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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