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Absorption with instantaneous reaction in a droplet with sparingly soluble fines
Author(s) -
Scala Fabrizio,
D'Ascenzo Michele
Publication year - 2002
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.690480813
Subject(s) - dissolution , flue gas desulfurization , absorption (acoustics) , chemistry , particle (ecology) , particle size , chemical reaction , thermodynamics , chemical engineering , materials science , organic chemistry , oceanography , physics , engineering , composite material , geology
The problem of gas absorption followed by an instantaneous irreversible chemical reaction in a rigid droplet containing sparingly soluble fine reactant particles is discussed. A model was developed for the general case when the reactant particle dissolution near the gas–liquid interface is nonnegligible. Solids dissolution is treated taking into account the average spacing between the suspended particles. A simple analytical expression for the rate of gas absorption is derived under the assumption of slow particle dissolution, and conditions are given for applicability of the model. A numerical example, relevant for the spray‐dry desulfurization process, for the system SO 2 ‐Ca(OH) 2 in water is discussed.