Potassium alum thermal decomposition study under non-reductive and reductive conditions

Sustainable magnesium phosphate micromortars formulated with PAVAL® alumina by-product as micro-aggregate

“…PV (Fig. 2b) presented a total weight loss of 18.52 wt.% assigned to NaAl(SO 4 ) 2 •6H 2 O water loss resulting in NaAl(SO 4 ) 2 and H 2 O (from 30 to 80 • C) [65], Al(OH) 3 dehydroxylation transforming into Al 2 O 3 and H 2 O (from 80 to 655 • C) [66], NaAl(SO 4 ) 2 desulphuration producing Na 2 O, Al 2 O 3 , and SO 3 (from 655 to 1090 • C) [67,68], and the decomposition of various mix of carbonates and sulphates found in XRD analysis (from 1090 to 1200 • C) with a broad DTG weight loss band.…”

Eldfellite-structured NaCr(SO4)2: a potential anode for rechargeable Na-ion and Li-ion batteries

“…A second weight loss corresponding to 24.9% (equivalent to a loss of 12H 2 O from the crystal) in the temperature range of 174.56 °C to 275.34 °C was observed, resulting from the loss of chemically bonded crystallized water, as represented by the sharp weight loss in the TGA plot. 24 A third weight loss of about 9.53% above 600 °C to 732 °C was observed, corresponding to a weight loss simultaneous release of SO 2 due to the thermal decomposition of the material. That is why we did the calcination at around 400 °C to obtain the eldfellite phase of NaCr(SO 4 ) 2 .…”

“…A second weight loss corresponding to 24.9% (equivalent to a loss of 12H 2 O from the crystal) in the temperature range of 174.56 °C to 275.34 °C was observed, resulting from the loss of chemically bonded crystallized water, as represented by the sharp weight loss in the TGA plot. 24 A third weight loss of about 9.53% above 600 °C to 732 °C was Fig. 4 TGA-DTA curve for a synthesized precursor of NaCr(SO 4 ) 2 .…”

Effect of an Alumina Supported Palladium Catalyst on the Magnesium Sulfate Decomposition Kinetics

“…Therefore, an intensifying effort to lower the processes operational temperatures as well as the wasted energy recovering in some unitary operations has been observed 21 . The most relevant alternatives are associated with the development of a reductive atmosphere 22 as well as the use of catalysts 15 to enhance the thermal decomposition mechanism towards sulfur oxide formation. For the latter, the contribution to lowering the decomposition temperature in water-splitting cycles could provide an energetic advantage in solar-based operations.…”