Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 2665 - 2672 (1986)
Update date:2022-08-10
Topics:
Balasubramanian, Krithivasa
Krishnasamy, Vengaimuthu
The decomposition of isopropanol over nickel, manganese and magnesium chromite spinel catalysts has been investigated in the vapour phase in an integral reactor.Its decomposition follows first-order kinetics.Kinetic and thermodynamic parameters have been calculated using the Arrhenius and Eyring equations.The activity pattern is found to be NiCr2O4>MnCr2O4>MgCr2O4.The chromite spinels have been characterised by X-ray studies, i.r. spectral analysis, conductivity and thermoelectric potential measurements.All three chromites were found to be p-type semiconductors in the temperature range 150-400 deg C.Exclusive dehydrogenetion is shown by NiCr2O4 and MnCr2O4, whereas MgCr2O4 functions as a dehydrogenation and dehydration catalyst.A linear correlation exists between the entropy of activation and the activation energy for electrical conduction for the chromite spinels studied.
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