Transformation of Solid Potassium Ferrate(VI) (K2FeO4): Mechanism and Kinetic Effect of Air Humidity

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F09%3A00010375" target="_blank" >RIV/61989592:15310/09:00010375 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—

Result language
angličtina
Original language name
Transformation of Solid Potassium Ferrate(VI) (K2FeO4): Mechanism and Kinetic Effect of Air Humidity
Original language description
The kinetics of solid-state transformation (aging) of potassium ferrate(VI) (K2FeO4) under various air-humidity conditions (55-95% relative humidity) at room temperature were studied by in-situ Mossbauer spectroscopy. The kinetic data showed a significant increase in the decomposition rate with increasing air humidity. The decomposition kinetics is very unusual with two almost linear decay steps. The first slow decay was observable at rather lower humidity levels (55-70%) probably due to the formation of the narrow compact layer of nanoparticulate Fe(OH)(3) reaction product. This layer limits the access of both H2O and CO2 participating in the reaction as the gaseous reactants. The second decay with much faster rate showed a nearly positive linear relationship with the humidity. The identification and characterization of the final products of aging were conducted by using X-ray diffraction (XRD), variable-temperature and in-field Mossbauer spectroscopy, magnetic measurements, thermogra
Czech name
—
Czech description
—

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
—

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)