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Differential thermal analysis for estimation of the thermal stability of NPK fertilizers

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Abstract

The thermal decomposition of NPK fertilizers was studied by thermal analysis under dynamic and quasi-isothermal-quasi-isobaric conditions in open and labyrinth crucibles.

It was found that under quasi-equilibrium conditions, the thermal analysis reveals mainly decomposition processes. The thermal stability of NPK fertilizers is characterized by the temperature of beginning of the spontaneous exothermic decomposition, at 180–190‡.

Zusammenfassung

Mittels Thermoanalyse unter dynamischen und quasi-isothermen-quasi-isobaren Bedingungen in offenen und Labyrinthtiegeln wurde die thermische Zersetzung von NPK-Düngern untersucht.

Man fand, da\ die wichtigsten Zersetzungsprozesse durch die Thermoanalyse unter quasi-Gleichgewichtsbedingungen charakterisiert werden. Die thermische StabilitÄt von NPK-Düngern wird durch die Temperatur gekennzeichnet, bei der eine spontane exotherme Zersetzung einsetzt (180–190‡C).

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Tynsuaadu, K., Viisimaa, L. Differential thermal analysis for estimation of the thermal stability of NPK fertilizers. Journal of Thermal Analysis 37, 927–934 (1991). https://doi.org/10.1007/BF01932790

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  • DOI: https://doi.org/10.1007/BF01932790

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