Documents disponibles écrits par cet auteur

Enhancement of the flotation deinking selectivity by natural polymeric dispersants / Elisa Zeno in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9322-9329 Titre : Enhancement of the flotation deinking selectivity by natural polymeric dispersants Type de document : texte imprimé Auteurs : Elisa Zeno, Auteur ; Patrick Huber, Auteur ; Xavier Rousset, Auteur Année de publication : 2010 Article en page(s) : pp. 9322-9329 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Dispersant  Deinking  Flotation Résumé : The impact of natural polymeric dispersants, that is, carboxymethyl cellulose and guar gum, on the flotation selectivity was investigated on a flotation deinking pilot plant. Their effect on pulp flocculation, air bubble size, and gas hold-up was determined by implementing a fiber flocculation sensor, an automated bubble measurement device, and a gas hold-up sensor on the pilot cell. Dispersants reduced pulp flocculation and induced an increase in gas hold-up and a slight decrease in the air bubble size. Their addition promoted ink removal and, at the same time, depressed fiber entrainment and mineral fillers flotation, thus increasing exceptionally the flotation selectivity. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23289666 [article] Enhancement of the flotation deinking selectivity by natural polymeric dispersants [texte imprimé] / Elisa Zeno, Auteur ; Patrick Huber, Auteur ; Xavier Rousset, Auteur . - 2010 . - pp. 9322-9329. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9322-9329 Mots-clés : Dispersant  Deinking  Flotation Résumé : The impact of natural polymeric dispersants, that is, carboxymethyl cellulose and guar gum, on the flotation selectivity was investigated on a flotation deinking pilot plant. Their effect on pulp flocculation, air bubble size, and gas hold-up was determined by implementing a fiber flocculation sensor, an automated bubble measurement device, and a gas hold-up sensor on the pilot cell. Dispersants reduced pulp flocculation and induced an increase in gas hold-up and a slight decrease in the air bubble size. Their addition promoted ink removal and, at the same time, depressed fiber entrainment and mineral fillers flotation, thus increasing exceptionally the flotation selectivity. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23289666

Kinetics of CO2 stripping and its effect on the saturation state of CaCO3 upon aeration of a CaCO3 – CO 2 – H2O system / Patrick Huber in Industrial & engineering chemistry research, Vol. 50 N° 24 (Décembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 13655–13661 Titre : Kinetics of CO2 stripping and its effect on the saturation state of CaCO3 upon aeration of a CaCO3 – CO 2 – H2O system : application to scaling in the papermaking process Type de document : texte imprimé Auteurs : Patrick Huber, Auteur Année de publication : 2012 Article en page(s) : pp. 13655–13661 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Kinetics  Papermaking  process Résumé : Calcium carbonate scaling is a critical problem in papermills. It often has been observed that scaling occurs in aerated sections of the process, where CO2 stripping from the solution is responsible for the saturation increase with respect to CaCO3. To better cope with scaling problems, it is important to be able to predict both supersaturation levels after aeration and the rate at which the system becomes supersaturated. In this study, trials are performed on a bubble column. Air is bubbled to strip out the dissolved CO2 from a CaCO3–CO2–H2O system. The saturation kinetics with respect to CaCO3 are followed by recording pH, and analyzed by speciation calculations. Aeration conditions are determined through gas hold-up and bubble size measurements. A general kinetic model is proposed to estimate how fast a solution will become saturated with respect to calcium carbonate during aeration. The model is applied to water quality and aeration conditions typically encountered in some unit operations of the papermaking process. Knowing the rate of change of calcium carbonate saturation will help papermakers to better estimate scaling risk in their process, and will help equipment suppliers to either minimize scaling problems in aerated sections of the process or design aeration units for calcium carbonate removal by controlled precipitation. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200956z [article] Kinetics of CO2 stripping and its effect on the saturation state of CaCO3 upon aeration of a CaCO3 – CO 2 – H2O system : application to scaling in the papermaking process [texte imprimé] / Patrick Huber, Auteur . - 2012 . - pp. 13655–13661. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 13655–13661 Mots-clés : Kinetics  Papermaking  process Résumé : Calcium carbonate scaling is a critical problem in papermills. It often has been observed that scaling occurs in aerated sections of the process, where CO2 stripping from the solution is responsible for the saturation increase with respect to CaCO3. To better cope with scaling problems, it is important to be able to predict both supersaturation levels after aeration and the rate at which the system becomes supersaturated. In this study, trials are performed on a bubble column. Air is bubbled to strip out the dissolved CO2 from a CaCO3–CO2–H2O system. The saturation kinetics with respect to CaCO3 are followed by recording pH, and analyzed by speciation calculations. Aeration conditions are determined through gas hold-up and bubble size measurements. A general kinetic model is proposed to estimate how fast a solution will become saturated with respect to calcium carbonate during aeration. The model is applied to water quality and aeration conditions typically encountered in some unit operations of the papermaking process. Knowing the rate of change of calcium carbonate saturation will help papermakers to better estimate scaling risk in their process, and will help equipment suppliers to either minimize scaling problems in aerated sections of the process or design aeration units for calcium carbonate removal by controlled precipitation. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200956z