Archives in Chemical Research Open Access

The TG/DSC coupling at the MS to determination and characterizations of RE3+ luminophors

EuroSciCon Conference on Biochemical, Chemical Engineering & Mass Spectrometry

November 19-20, 2018 Prague, Czech Republic

Rodrigo V Rodrigues, Lukasz Marciniak, Alex S Borges, Emanuel J B Muri, Latif U Khan, Antonio A L Marins and Wieslaw Strek

Institute of Chemistry-S�£o Paulo University, Brazil Institute of Low Temperature Structure and Research-Polish Academy of Science, Poland Federal Institute of Esp�­rito Santo (UFES), Brazil

Posters & Accepted Abstracts: Arch Chem

Abstract:

Thermal analytical techniques were used to analyse gaseous products evolved during the co-firing of coal with refuse derived fuels. The combined thermogravimetric (TG/DSC) coupling with mass spectrometry (MS) techniques were employed to study and characterize the behaviour pathways for the formation of gaseous products during combustion, such as Cl, HCl, CO, CO2, H2O, NO2, SO2 and others organic compounds. The discovery of molecular CO2, H2O, NO2 and SO2 led us to look for the possible formation of oxysulfate luminophors compounds (RE2O2SO4) in the combustion process. NO2, SO2 species are released in the different temperatures and changed according to RE3+ ratio range and in higher concentrations during fast heating rates compared to relatively slow ones. These results confirm the optimal temperature of RE2O2SO4 stabilization and formation of this compound; in particular at the Tb3+ (green emission colour) ion due to the probability of oxidation to Tb4+.

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