Effect of precipitation conditions on the morphology of strontium molybdate agglomerates

Ana Cameirão (1, 2, 3) , René David (4) , Fabienne Espitalier (4) , Frédéric Gruy (1, 2, 3)

1 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
2 LPMG-EMSE - Laboratoire des Procédés en Milieux Granulaires
3 GENERIC-ENSMSE - Département Géochimie, environnement, écoulement, réacteurs industriels et cristallisation
4 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement

Preliminary experimental results about precipitation of strontium molybdate particles show that they have morphology as hierarchical agglomerates [A. Cameirao, R. David, F. Espitalier, F. Gruy, Multiple agglomeration in strontium molybdate precipitation, 16th ISIC, 2005, pp. 355-360]. The precipitation of strontium molybdate was studied and monitored in a batch reactor. The precipitation parameters, i.e. initial concentration of strontium molybdate. temperature and stirring rate, have an effect on the particles and agglomerates morphology. The shapes of the crystals were observed by SEM, and the PSD was measured at the end of precipitation by laser diffraction. The powders were also analysed by XRD, surface area (BET) and porosity measurements. Finally, a model of agglomeration was designed in order to predict the morphology of the observed agglomerates.

Keywords: oxides; growth from solutions; roughening; supersaturated solutions; industrial crystallization; crystal morphology

Domains: Chemical and Process Engineering

Ana Cameirão, René David, Fabienne Espitalier, Frédéric Gruy. Effect of precipitation conditions on the morphology of strontium molybdate agglomerates. Journal of Crystal Growth, 2008, 310 (18), pp.4152-4162. ⟨10.1016/j.jcrysgro.2008.06.024⟩. ⟨emse-00500589⟩