Capture of SO2 by limestone in a 71 MWe pressurized fluidized bed boiler

Abstract

A 71 MWe pressurized fluidized bed coal combustor was operated. A wide variety of coals were burnt under fly ash recycle conditions. Limestone was fed to the combustor as bed material as well as sorbent. The emission of SO^ and limestone attrition rate were measured. A simple mathematical model of SO? capture by limestone with intermittent solid attrition was applied to the analysis of the present experimental results. Except for high sulfur fuel, the results of the present model agreed with the experimental results.

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

“…Limestones of different ages may show different behavior, and also those that suffer high attrition rate, exposing new unreacted surface, as cited before (Anthony et al, 2001, Shimizu et al, 2003, Chen et al, 2008Scala et al, 2008). Fig.…”

First-principles study of calcium-based sulfur fixers and their products

“…The investment and operating costs of this method are both low, and it has been widely used. However, the limestone furnace decomposition and sulfur fixation technology have their own shortcomings [5][6][7][8][9][10]: (1) The decomposition time of limestone in the furnace is longer, and the organic sulfur volatilized in the coal is shorter, resulting in the decomposition of calcium oxide and the decomposed sulfur. Oxides cannot match the reaction well, which affect the efficiency of sulfur fixation in the furnace, resulting in a large concentration of sulfur oxides in the flue gas.…”