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Characterization of the reactivity of limestones with SO 2 in a fluidized bed reactor
Author(s) -
GarciáLabiano F.,
Adánez J.,
Rubiera F.,
Fuertes A. B.,
Pis J. J.
Publication year - 1992
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450700417
Subject(s) - sorbent , bituminous coal , fluidized bed , reactivity (psychology) , fluidized bed combustion , combustion , chemistry , combustor , porosity , calcination , coal , mass transfer , fluidization , particle size , reaction rate , flue gas desulfurization , chemical engineering , mineralogy , adsorption , chromatography , organic chemistry , medicine , alternative medicine , pathology , engineering , catalysis
The reaction between SO 2 and calcined limestone particles has been studied in a fluidized bed combustor. Measurements of sorbent reactivity with SO 2 were made for small batches of limestone injected into the combustor. Simultaneous continuous combustion of bituminous coal provided conditions like those of a boiler for study of the sulphation reaction. A semi‐empirical rate model of the CaO‐SO 2 reaction has been developed. External mass transfer of SO 2 , diffusion within the particles and chemical reaction are taken into account. The limestone reactivity with SO 2 is characterized by two parameters which are dependent on the temperature and sorbent particle size. A model for predicting the limestone requirements in a fluidized bed boiler has been developed. Parameters from the batch experiments are included. The predictions for sulfur retention agree with the experimental results. In addition, effects of operating conditions (gas velocity, recycle, limestone particle size) on the retention of SO 2 were simulated using the model.