Metodologia para o estudo da porosidade de dolomita em ensaio de sulfatação interrompida Methodology for the study of the dolomite porosity in essay of interrupted sulfation

• Main Authors: Ivonete Ávila, Paula M. Crnkovic, Fernando E. Milioli
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2010-01-01
• Series: Química Nova
• Subjects: sulfation; limestone; porosimetry
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000800021

<abstract language="eng">The aim of this work is to propose a methodology to evaluate the evolution of the pore blockage of limestone during the sulfation reaction. The experiments were performed for a national limestone (dolomite) with average particle size of 545 &#956;m in interrupted sulfation tests were conducted at seven different times and at three different temperatures of the process. The empirical data were obtained from porosimetry tests to establish BET surface area, volume and average size of pore and distribution of pore sizes of the sulfated samples. Thermogravimetric tests were performed to evaluate the preparation methodology of the samples used in the porosimetry tests.