Documents disponibles écrits par cet auteur

Dynamic liquid saturation in a trickle bed reactor involving Newtonian/non-Newtonian liquid phase / Ajay Bansal in Industrial & engineering chemistry research, Vol. 48 N° 7 (Avril 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3341–3350 Titre : Dynamic liquid saturation in a trickle bed reactor involving Newtonian/non-Newtonian liquid phase Type de document : texte imprimé Auteurs : Ajay Bansal, Auteur ; S. K. Sharma, Auteur Année de publication : 2009 Article en page(s) : pp. 3341–3350 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Dynamic  liquid  saturation  Trickle  bed  reactor  Newtonian  liquid  phase  Liquid  flow  rates  Non-Newtonian  viscoelastic  fluids Résumé : Dynamic liquid saturation is an important hydrodynamic parameter that affects the performance of a trickle bed reactor. The parameters that affect the dynamic liquid saturation, by using Newtonian liquid phase, include gas and liquid flow rates, surface tension and viscosity of the liquid phase, and bed configurations. Additional rheological parameters affecting dynamic liquid saturation, in case of non-Newtonian viscoinelastic liquids, are observed to be flow consistency index K and flow behavior index n. The effect of viscoelasticity, in case of non-Newtonian viscoelastic fluids, was investigated in terms of Weissenberg number. A set of 20 correlations were selected from the literature to see the applicability of these correlations under varied conditions of bed configurations and liquid-phase properties as studied in the present investigation. It was observed that the correlations are valid only for a restricted range of parameters and none of the correlations seem to be applicable over the entire range of parameters as investigated in the present study. On the basis of the experimental data obtained, correlations are first developed for Newtonian liquids. These correlations could reproduce the literature data satisfactorily to ±20%. Further, the correlations developed are extended to predict dynamic liquid saturation for viscoinelastic and viscoelastic liquid phases. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801399u [article] Dynamic liquid saturation in a trickle bed reactor involving Newtonian/non-Newtonian liquid phase [texte imprimé] / Ajay Bansal, Auteur ; S. K. Sharma, Auteur . - 2009 . - pp. 3341–3350. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3341–3350 Mots-clés : Dynamic  liquid  saturation  Trickle  bed  reactor  Newtonian  liquid  phase  Liquid  flow  rates  Non-Newtonian  viscoelastic  fluids Résumé : Dynamic liquid saturation is an important hydrodynamic parameter that affects the performance of a trickle bed reactor. The parameters that affect the dynamic liquid saturation, by using Newtonian liquid phase, include gas and liquid flow rates, surface tension and viscosity of the liquid phase, and bed configurations. Additional rheological parameters affecting dynamic liquid saturation, in case of non-Newtonian viscoinelastic liquids, are observed to be flow consistency index K and flow behavior index n. The effect of viscoelasticity, in case of non-Newtonian viscoelastic fluids, was investigated in terms of Weissenberg number. A set of 20 correlations were selected from the literature to see the applicability of these correlations under varied conditions of bed configurations and liquid-phase properties as studied in the present investigation. It was observed that the correlations are valid only for a restricted range of parameters and none of the correlations seem to be applicable over the entire range of parameters as investigated in the present study. On the basis of the experimental data obtained, correlations are first developed for Newtonian liquids. These correlations could reproduce the literature data satisfactorily to ±20%. Further, the correlations developed are extended to predict dynamic liquid saturation for viscoinelastic and viscoelastic liquid phases. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801399u

Effect of bed configuration on dispersion in a packed - bed reactor / Renu Gupta 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. 9525–9528 Titre : Effect of bed configuration on dispersion in a packed - bed reactor Type de document : texte imprimé Auteurs : Renu Gupta, Auteur ; Ajay Bansal, Auteur Année de publication : 2010 Article en page(s) : pp. 9525–9528 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Dispersion  Reactor Résumé : The axial dispersion coefficient is one of the important parameters in the design of the reactors. It has a strong influence on the conversion and selectivity. The present study has been conducted on a packed-bed reactor that had a diameter of 10 cm with particles of various configurations, using the pulse tracer technique. The dynamic response was well-explained by a single-parameter dispersion model. Dispersion, in terms of the Peclet number (Pe) and the Bodenstein number (Bo) has been observed for different bed configurations. Pe increased as the liquid flow rates increased. For spherical particles, Pe was determined to increase as the particle size increased. However, the Pe value for nonspherical particles was greater than that for spherical particles. Based on the experimental results, a correlation has been developed to estimate the dispersion in terms of Bo for packed beds involving different bed configurations. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901376s [article] Effect of bed configuration on dispersion in a packed - bed reactor [texte imprimé] / Renu Gupta, Auteur ; Ajay Bansal, Auteur . - 2010 . - pp. 9525–9528. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9525–9528 Mots-clés : Dispersion  Reactor Résumé : The axial dispersion coefficient is one of the important parameters in the design of the reactors. It has a strong influence on the conversion and selectivity. The present study has been conducted on a packed-bed reactor that had a diameter of 10 cm with particles of various configurations, using the pulse tracer technique. The dynamic response was well-explained by a single-parameter dispersion model. Dispersion, in terms of the Peclet number (Pe) and the Bodenstein number (Bo) has been observed for different bed configurations. Pe increased as the liquid flow rates increased. For spherical particles, Pe was determined to increase as the particle size increased. However, the Pe value for nonspherical particles was greater than that for spherical particles. Based on the experimental results, a correlation has been developed to estimate the dispersion in terms of Bo for packed beds involving different bed configurations. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901376s