Thermal Analysis of Conversion Products Derived from Phosphogypsum and Natural Gypsum
Kholmurodov Jamshidbek Erkinovich *
Doctor of Philosophy in Technical Sciences, Senior Researcher, Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan and Doctoral Student, Namangan State Technical University, 160115, Namangan, Uzbekistan.
Namazov Shafaat Sattarovich
Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan.
Seytnazarov Atanazar Reypnazarovich
Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, Tashkent, Uzbekistan.
Nomozov Shuxratjon Yuldashali-ugli
Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan; Uzbekistan.
Qosimov Dilshodjon Mamurjon ugli
Institute of General and Inorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, Dilshodbek, Uzbekistan.
*Author to whom correspondence should be addressed.
Abstract
This study investigates the scientific foundations for the environmentally and economically viable processing of phosphogypsum (PG), the primary waste from phosphoric acid manufacturing. Its main objective is a comparative analysis of converting natural gypsum (NG) and phosphogypsum using ammonium carbonate ((NH4)2CO3) to produce valuable calcium carbonate (CaCO3) and ammonium sulfate, alongside characterizing the thermal properties of the raw materials and products.
The conversion process was evaluated using thermal analysis, a critical method for assessing reaction efficiency, product stability, and material characteristics. This approach provides essential data on the thermal behavior and decomposition profiles of the substances involved.
Keywords: Ammonium carbonate, calcium carbonate, decarbonation, differential thermal analysis (DTA), phosphogypsum, thermogravimetry (TG)