1991
DOI: 10.1016/0040-6031(91)80100-w
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Thermal studies on chromium(II) salts

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Cited by 4 publications
(2 citation statements)
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“…The onset of decomposition of iron, chromium and aluminium sulphates occurs at temperatures ranging between 500-600 °C (Bayer et al, 1982;Krouse et al, 1991;Tagawa, 1984), while that of magnesium sulphate is from 850 °C (Tagawa, 1984). MT tct formed at 550 °C contained very little, if any, NH 3 , as confirmed by the absence of mass loss (TGA) and by endothermic peaks (DTA) between 350 °C -400 °C.…”
Section: Preliminary Thermochemical Treatment (Static Furnace)mentioning
confidence: 87%
“…The onset of decomposition of iron, chromium and aluminium sulphates occurs at temperatures ranging between 500-600 °C (Bayer et al, 1982;Krouse et al, 1991;Tagawa, 1984), while that of magnesium sulphate is from 850 °C (Tagawa, 1984). MT tct formed at 550 °C contained very little, if any, NH 3 , as confirmed by the absence of mass loss (TGA) and by endothermic peaks (DTA) between 350 °C -400 °C.…”
Section: Preliminary Thermochemical Treatment (Static Furnace)mentioning
confidence: 87%
“…Dissociation of ammonium metal sulphate phases into their respective metal sulphate phases is known to occur between 450 -550 °C [36], and this phenomenon was observed in MTtct formed using (NH4)2SO4 at ≤ 500°C and NH4HSO4 at ≤ 450°C. The onset of decomposition of Fe, Cr and Al sulphates (FeSO4/Fe2(SO4)3, Cr2(SO4)3.xH2O, Al2(SO4)3) occurs at temperatures ranging between 500-600 °C [36][37][38], while that of Mg sulphate (MgSO4) takes place from 850 °C [39]. Although the TG curves of MTtct obtained from the sulphate salts exhibited similarities, a smaller mass loss was observed for MTtct using NH4HSO4 compared to (NH4)2SO4, regardless of the reaction temperature.…”
Section: Treatment Experimentsmentioning
confidence: 99%