Issue 32, 2006
From the journal:

Journal of Materials Chemistry

Formation of calcium carbonate particles by direct contact of Ca(OH)2 powders with supercritical CO2

Wei Gu,a   Douglas W. Bousfieldb  and  Carl P. Tripp*a  

* Corresponding authors

a Laboratory for Surface Science and Technology (LASST) and Department of Chemistry, University of Maine, Orono, Maine, USA
E-mail: ctripp@maine.edu
Fax: +1 (207) 581-2255
Tel: +1 (207) 581-2235

b Department of Chemical and Biological Engineering, University of Maine, Orono, Maine, USA
E-mail: bousfld@maine.edu
Fax: +1 (207) 581-2323
Tel: +1 (207) 581-2300

Abstract

A novel method to obtain a high conversion of Ca(OH)2 powder to CaCO3 is reported. The method uses supercritical CO2 containing water that is passed over the dry Ca(OH)2 powder. Conversions greater than 98% are obtained. The dominant crystal structure is calcite. The process has the advantages of the conventional solution based process in terms of high conversion and the advantages of a gas–solid based process in that dry, non-agglomerated particles are obtained by simple venting of the solvent.

Graphical abstract: Formation of calcium carbonate particles by direct contact of Ca(OH)2 powders with supercritical CO2

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Article information

DOI
https://doi.org/10.1039/B607184H
Article type
Paper
Submitted
22 May 2006
Accepted
23 Jun 2006
First published
07 Jul 2006

J. Mater. Chem., 2006,16, 3312-3317

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Formation of calcium carbonate particles by direct contact of Ca(OH)2 powders with supercritical CO2

W. Gu, D. W. Bousfield and C. P. Tripp, J. Mater. Chem., 2006, 16, 3312 DOI: 10.1039/B607184H

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