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Composition limits in granulation with active component in the binder
Author(s) -
Smrčka David,
Schöngut Marek,
Štěpánek František,
Gregor Tomáš
Publication year - 2015
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.14667
Subject(s) - granulation , wetting , dispersity , chemical engineering , granule (geology) , pulmonary surfactant , viscosity , particle size , materials science , penetration (warfare) , particle (ecology) , specific surface area , chemistry , composite material , polymer chemistry , organic chemistry , oceanography , operations research , engineering , geology , catalysis
The process of reactive granulation is considered. Sodium carbonate primary particles react with dodecyl‐benzenesulfonic acid droplets to form granules where the active component is an anionic surfactant formed by the reaction. The effect of primary particle size on the maximum binder/solids ratio was systematically investigated and found to be directly proportional to the specific surface area of the primary particles regardless of how this surface area was achieved—whether by monodisperse powders or bimodal powder mixtures. The effect of binder viscosity on the maximum binder capacity has shown a nontrivial behavior: while the maximum binder content increased with increasing binder viscosity for fine primary particles, the opposite trend was observed in the case of coarse primary particles. This behavior was explained by detailed studies of primary particle wetting and binder penetration into particle beds, as well as by microtomography analysis of the internal granule structure. © 2014 American Institute of Chemical Engineers AIChE J , 61: 395–406, 2015