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Abstract
The thermal behaviour of kaolinites intercalated with formamide, dimethyl sulphoxide and hydrazine has been studied by simultaneous TG-DTG-DTA-EGA and TG-MS techniques. The complexes can be decomposed completely without dehydroxylating the mineral. It was found that the amount of intercalated guest molecules per inner surface OH-group is close to unity for the formamide and dimethyl sulphoxide intercalates. For the intercalation of hydrazine it was found that hydrazine is locked in the expanded mineral as hydrazine hydrate and its amount is somewhat higher than that obtained for the other two reagents. The thermal evolution patterns of the guest molecules revealed that all the three reagents are bonded at least in two different ways in the interlayer space.
Thermal analysis of some fly ashes
I. Gastitrimetric determination of carbon and sulfur contents of fly ashes
Abstract
The thermal behavior of different fly ashes from the electrical precipitators of various pulverized carbon fuel-fired boilers was investigated by means of simultaneous TG, DTG, DTA and EGA analysis. The carbon and sulfur contents of the samples were determined by gastitrimetry. The compositions of the samples were examined by X-ray diffraction. The quantitative oxide analysis of the ashes was carried out by means of a classical method.
