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A single, particle‐size model for sulfur retention in fluidized bed coal combustors
Author(s) -
Lee D. C.,
Georgakis Christos
Publication year - 1981
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690270317
Subject(s) - sulfur , chemistry , coal , fluidization , residence time (fluid dynamics) , sorbent , dimensionless quantity , fluidized bed , particle size , particle (ecology) , thermodynamics , analytical chemistry (journal) , chromatography , adsorption , organic chemistry , physics , geotechnical engineering , engineering , oceanography , geology
A reactor model is presented to calculate the sulfur retention and SO 2 emission of a fluidized‐bed coal combustor with absorption of SO 2 by limestone or dolomite. It is based on the two‐phase theory of fluidization and a two parameter simplified rate expression for the sulfation reaction. Both parameters can be determined by experimental reaction rate measurements. In the overall reactor model, an average size is assumed for all the stone particles in the bed. Sulfur retention is found to be dependent on only three dimensionless parameters. Comparisons with experimental measurements indicated that the model predicts satisfactorily the dependence of sulfur retention on the Ca/S ratio, sulfur content of the coal, excess air, gas residence time, and sorbent type.