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Crystallization of Nano‐Calcium Carbonate: The Influence of Process Parameters
Author(s) -
Aldea Steliana,
Snåre Mathias,
Eränen Kari,
Grenman Henrik,
Rautio AnneRiikka,
Kordás Krisztian,
Mikkola JyriPekka,
Salmi Tapio,
Murzin Dmitry Y.
Publication year - 2016
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201600028
Subject(s) - carbonation , calcium carbonate , calcite , calcium hydroxide , crystallization , chemical engineering , particle size , calcium , chemistry , carbonate , mixing (physics) , mineralogy , nano , morphology (biology) , particle (ecology) , hydroxide , inorganic chemistry , organic chemistry , geology , engineering , paleontology , physics , oceanography , quantum mechanics
Precipitated calcium carbonate was synthesized by carbonation of calcium hydroxide in the presence and absence of ultrasound (conventional stirring) at atmospheric as well as at elevated pressures and different initial concentrations of Ca(OH) 2 . Spherical morphology of the formed calcite was favored at high Ca(OH) 2 concentrations and low CO 2 pressures. The presence of ultrasound did not show any influence on the reaction rate in case of efficient mixing. A small increase of the reaction rate was observed at lower CO 2 pressures. Elevated pressures in combination with ultrasound did not lead to notable changes of reaction rate or particle morphology.