Portal de Periódicos da CAPES

Artigo Acesso aberto Produção Nacional Revisado por pares

BIBTEX RIS

Determinação dos parâmetros de arrhenius da reação de sorção do dióxido de enxofre por calcário

2007; Brazilian Chemical Society; Volume: 30; Issue: 5 Linguagem: Inglês

10.1590/s0100-40422007000500041

1678-7064

Ivonete Ávila, Paula Manoel Crnkovic, Fernando Eduardo Milioli,

Chemical Analysis and Environmental Impact

THE SULFUR DIOXIDE SORPTION REACTION BY LIMESTONE.Sulfur emission in coal power generation is a matter of great environmental concern and limestone sorbents are widely used for reducing such emissions.Thermogravimetry was applied to determine the effects of the type of limestone (calcite and dolomite), particle size (530 and 650 µm) and atmosphere (air and nitrogen) on the kinetics of SO 2 sorption by limestone.Isothermal experiments were performed for different temperatures (650 to 950 o C), at local atmospheric pressure.The apparent activation energies, as indicated by the slope of the Arrhenius plot, resulted between 3.03 and 4.45 kJ mol -1 for the calcite, and 11.24 kJ mol -1 for the dolomite.