Dynamical model of brushite precipitation

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Cristina Oliveira (Author) Other; Petia Georgieva (Author) Other; Fernando Rocha (Author) FEUP; Antonio Ferreira (Author) FEUP; Sebastiao Feyo de Azevedo (Author) FEUP

Journal

Title: Journal of Crystal Growth

Vol. 305 No. 1

Pages: 201-210

ISSN: 0022-0248

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 14 Citations

ISI Web of Science

Scopus - 18 Citations

Scientific classification

CORDIS: Technological sciences > Engineering > Chemical engineering

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-004-94D

DOI: 10.1016/j.jcrysgro.2007.04.016

Abstract (EN): The objectives of this work are twofold. From academic point of view the aim is to build a dynamical macro model to fit the material balance and explain the main kinetic mechanisms that govern the transformation of the hydroxyapatite (HAP) into brushite and the growth of brushite, based on laboratory experiments and collected database. From practical point of view, the aim is to design a reliable process simulator that can be easily imbedded in industrial software for model driven monitoring, optimization and control purposes. Based upon a databank of laboratory measurements of the calcium concentration in solution (on-line) and the particle size distribution (off-line) a reliable dynamical model of the dual nature of brushite particle formation for a range of initial concentrations of the reagents was derived as a system of ordinary differential equations of time. The performance of the model is tested with respect to the predicted evolution of mass of calcium in solution and the average (in mass) particle size along time. Results obtained demonstrate a good agreement between the model time trajectories and the available experimental data for a number of different initial concentrations of reagents.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10