FBC desulfurization process using coal with low sulfur content, high oxidizing conditions and metamorphic limestones

A metamorphic limestone and a dolomite were employed as SO2 sorbents in the desulfurization of gas from coal combustion. The tests were performed in a fluidized bed reactor on a bench and pilot scale. Several parameters such as bed temperature, sorbent type, and sorbent particle size at different Ca...

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Bibliographic Details
Published inBrazilian journal of chemical engineering Vol. 26; no. 2; pp. 375 - 383
Main Authors Bragança, S. R., Castellan, J. L.
Format Journal Article
LanguageEnglish
Published Brazilian Society of Chemical Engineering 01.06.2009
Subjects
ENGINEERING, CHEMICAL
Fluidized bed combustor
Desulfurization
Low SO2 concentration
Metamorphic limestone
Coal
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Summary:A metamorphic limestone and a dolomite were employed as SO2 sorbents in the desulfurization of gas from coal combustion. The tests were performed in a fluidized bed reactor on a bench and pilot scale. Several parameters such as bed temperature, sorbent type, and sorbent particle size at different Ca/S molar ratios were analyzed. These parameters were evaluated for the combustion of coal with low-sulfur/high-ash content, experimental conditions of high air excess and high O2 level in fluidization air. Under these conditions, typical of furnaces, few published data can be found. In this work, a medium level of desulfurization efficiency (~60%) for Ca/S = 2 was obtained.
ISSN:0104-6632
1678-4383
0104-6632
DOI:10.1590/S0104-66322009000200015