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- W4242884172 abstract "We report a kinetic and mechanistic study of the isothermal decomposition of ferric oxalate hydrate [Fe2(C2O4)3·4.6H2O]. The principal products of reaction between 410 and 450 K are carbon dioxide and ferrous oxalate which retains a small proportion (approx. 10%) of the ferric salt. From microscopic studies, it was concluded that reaction was not accompanied by melting. Yield-time curves were sigmoid shaped providing evidence that this is a nucleation and growth process occurring in the solid state. Data did not fit a single-rate equation but was satisfactorily expressed in two stages: the acceleratory first half fitted the Avrami-Erofe'ev equation (n = 2) and the second half fitted the contracting cube equation. The activation energies were relatively low for this type of reaction, 107 ± 8 and 120 ± 10 kJ mol−1 respectively. The reaction mechanism is discussed and it is concluded that the rate is controlled either by electron transfer or rupture of the C-C bond in the anion. The participation of water retained in the solid through intermediate formation of oxalic acid is discussed." @default.
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- W4242884172 date "1993-01-01" @default.
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- W4242884172 title "A kinetic and mechanistic study of the isothermal decomposition of ferric oxalate hydrate" @default.
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- W4242884172 doi "https://doi.org/10.1016/0040-6031(93)80022-3" @default.
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