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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Determination of the arrhenius parameters in the sulfur dioxide sorption reaction by limestone

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Author(s):
Ivonete Ávila [1] ; Paula M. Crnkovic [2] ; Fernando E. Milioli [3]
Total Authors: 3
Affiliation:
[1] Universidade de São Paulo. Escola de Engenharia de São Carlos. Departamento de Engenharia Mecânica - Brasil
[2] Universidade de São Paulo. Escola de Engenharia de São Carlos. Departamento de Engenharia Mecânica - Brasil
[3] Universidade de São Paulo. Escola de Engenharia de São Carlos. Departamento de Engenharia Mecânica - Brasil
Total Affiliations: 3
Document type: Journal article
Source: Química Nova; v. 30, n. 5, p. 1275-1281, 2007-10-00.
Abstract

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. (AU)