|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||PbZn 2020: The 9th International Symposium on Lead and Zinc Processing
||ZnSO4.H2O thermal decomposition in the presence of reducing agent (S2) and catalyst (Pd)
||Rodrigo F.M. Souza, Gabriela Kurban, Nathalli Meorlluw Mello, Rogério Navarro, Eduardo A. Brocchi
|On-Site Speaker (Planned)
||Rodrigo F.M. Souza
ZnSO4 thermal decomposition is a subject of interest in extractive metallurgy, hydrogen production based on thermochemical water cycles and nanoparticles synthesis. The present study deals with the thermal decomposition of a monohydrate zinc sulfate in the presence of a reducing agent (S2) or a catalyst (Pd). The manuscript covers a thermodynamics assessment, TGA/DSC study as well as reaction products materials characterization by means of SEM/EDS, XRD and FTIR. The reaction mechanism suggested by the thermodynamics indicates that sulfur acts in the sulfate decomposition as well as oxide reduction. In both cases, it was observed a modification over the behavior of sulfate thermal decomposition reaction with a clear lowering in its energy activation, since the reactions started in low temperatures. It was possible to obtain metallic Zn though reductive decomposition while ZnO was the single reaction product of the catalytic process.