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Transferred arc production of fumed silica / Ramona Pristavita in Industrial & engineering chemistry research, Vol. 47 N°17 (Septembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°17 (Septembre 2008) . - p. 6790–6795 Titre : Transferred arc production of fumed silica : rheological properties Type de document : texte imprimé Auteurs : Ramona Pristavita, Auteur ; Richard J. Munz, Auteur ; Tony Addona, Auteur Année de publication : 2008 Article en page(s) : p. 6790–6795 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Fumed  silica  Rheological  properties Résumé : Different grades of fumed silica can be obtained using an environmentally friendly thermal plasma process. In the present work, we studied the changes in the powder quality by varying the quench conditions used for the production of the powder and by agglomerating the product. Tests done before and after the agglomeration experiments showed that the agglomeration had no effect on the powder’s rheological or other properties. We concluded that the inferior rheological properties of the plasma produced fumed silica were due to the lack of the free hydroxyl groups on the surface of the particles. Posttreatment of plasma produced powder showed that the surface chemistry was modified and the free hydroxyl groups were introduced on the surface of the particles. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701724s [article] Transferred arc production of fumed silica : rheological properties [texte imprimé] / Ramona Pristavita, Auteur ; Richard J. Munz, Auteur ; Tony Addona, Auteur . - 2008 . - p. 6790–6795. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°17 (Septembre 2008) . - p. 6790–6795 Mots-clés : Fumed  silica  Rheological  properties Résumé : Different grades of fumed silica can be obtained using an environmentally friendly thermal plasma process. In the present work, we studied the changes in the powder quality by varying the quench conditions used for the production of the powder and by agglomerating the product. Tests done before and after the agglomeration experiments showed that the agglomeration had no effect on the powder’s rheological or other properties. We concluded that the inferior rheological properties of the plasma produced fumed silica were due to the lack of the free hydroxyl groups on the surface of the particles. Posttreatment of plasma produced powder showed that the surface chemistry was modified and the free hydroxyl groups were introduced on the surface of the particles. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701724s