Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Thermogravimetric study of the effect of temperature and atmosphere on sulfur dioxide absorption by limestone

Full text
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. 29, n. 6, p. 1244-1249, 2006-12-00.
Field of knowledge: Engineering - Chemical Engineering
Abstract

Thermogravimetry was applied to investigate the effects of temperature and atmosphere on conversion of sulfur dioxide (SO2) absorbed by limestone. Ranges of temperature and particle size were studied, typical of fluidized-bed coal combustion. Isothermal experiments were performed at different temperatures (between 750 and 950 ºC) under local atmospheric pressure (~ 697 mmHg) in dynamic atmospheres of air and nitrogen. The maximum conversion was 29% higher in nitrogen atmosphere than in air atmosphere. The optimum conversion temperature was found at 831 ºC in air atmosphere and at 894 ºC in nitrogen atmosphere. (AU)