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

Química Nova

Ivonete Ávila¹  Paula M. Crnkovic¹  Fernando E. Milioli¹ 

[1] ,Universidade de São Paulo Escola de Engenharia de São Carlos Departamento de Engenharia MecânicaSão Carlos SP ,Brasil

关键词: sulfur dioxide;    limestone;    kinetics;   

DOI  :  10.1590/S0100-40422007000500041

来源: SciELO

【 摘 要 】

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 SO2 sorption by limestone. Isothermal experiments were performed for different temperatures (650 to 950 ºC), 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.

【 授权许可】

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