Non-isothermal kinetic characterisation of a gas-solid reaction by TG analysis | Zendy

Željko Čupić | Zendy; Dušan Jovanović | Zendy; Jugoslav Krstić | Zendy; N. Vukelić | Zendy; Zoran Nedić | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Non-isothermal kinetic characterisation of a gas-solid reaction by TG analysis

Author(s) -

Željko Čupić,

Dušan Jovanović,

Jugoslav Krstić,

N. Vukelić,

Zoran Nedić

Publication year - 2005

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc0511301c

Subject(s) - thermogravimetry , kinetics , isothermal process , order of reaction , activation energy , catalysis , hydrogen , chemical kinetics , chemistry , kinetic energy , reaction mechanism , thermal analysis , thermodynamics , materials science , analytical chemistry (journal) , thermal , inorganic chemistry , reaction rate constant , chromatography , organic chemistry , physics , quantum mechanics

A series of silica-supported Ni-catalyst precursors was synthesized, with different SiO2/Ni mole ratios between 0.2 and 1.15. The reduction of all the prepared samples was studied by thermogravimetry (TG) in a hydrogen flow. The results of the TG analysis were analyzed by the multi-thermal history model-fitting method, with non-linear regression. The activation energies for the reduction of each sample were determined. The statistical F-test was performed to discriminate between vari- ous models. It was found that increasing the SiO2/Ni mole ratio leads to a change in the reaction mechanism of the nickel reduction, resulting finally in a change from second order reaction kinetics to three halves order reaction kinetics.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research