Documents disponibles écrits par cet auteur

Modeling and simulation of stirred dead end ultrafiltration process using the aspen engineering suite / Sabuj Das in Industrial & engineering chemistry research, Vol. 48 N° 9 (Mai 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 9 (Mai 2009) . - pp. 4428–4439 Titre : Modeling and simulation of stirred dead end ultrafiltration process using the aspen engineering suite Type de document : texte imprimé Auteurs : Sabuj Das, Auteur ; Prabirkumar Saha, Auteur ; G. Pugazhenthi, Auteur Année de publication : 2009 Article en page(s) : pp. 4428–4439 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Pressure-driven  membrane  process  Stirred  cell  Aspen  engineering  suite Résumé : Simulation of pressure-driven membrane process has been carried out considering two different types of solute (silica and dextran) and membrane (partially permeable and totally retentive) in a stirred cell using the Aspen Engineering Suite. One solute, silica, exerts negligible osmotic pressure but the other, dextran, offers adequate osmotic pressure. Silica is very susceptible to form a gel layer while dextran has no such tendency. Two types of membrane are considered for this work. One membrane completely separates solute from the solvent (totally retentive membrane) and the other does it partially (partially permeable membrane). The second type of membrane is regarded as highly compact granulated particle layer which has a different range of porosity. So the diffusivity within the membrane layer is referred to as hindered back diffusion. Osmotic pressure model and gel polarization model have been considered for batch and continuous mode operation. Silica suspension has been simulated with totally retentive membrane and dextran solution is simulated with partially retentive membrane in batch and continuous mode, respectively. The effect of applied pressure, stirring speed, and initial feed concentration on permeate flux, membrane surface concentration, permeate concentration, and true and observed rejection have been studied. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801293d [article] Modeling and simulation of stirred dead end ultrafiltration process using the aspen engineering suite [texte imprimé] / Sabuj Das, Auteur ; Prabirkumar Saha, Auteur ; G. Pugazhenthi, Auteur . - 2009 . - pp. 4428–4439. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 9 (Mai 2009) . - pp. 4428–4439 Mots-clés : Pressure-driven  membrane  process  Stirred  cell  Aspen  engineering  suite Résumé : Simulation of pressure-driven membrane process has been carried out considering two different types of solute (silica and dextran) and membrane (partially permeable and totally retentive) in a stirred cell using the Aspen Engineering Suite. One solute, silica, exerts negligible osmotic pressure but the other, dextran, offers adequate osmotic pressure. Silica is very susceptible to form a gel layer while dextran has no such tendency. Two types of membrane are considered for this work. One membrane completely separates solute from the solvent (totally retentive membrane) and the other does it partially (partially permeable membrane). The second type of membrane is regarded as highly compact granulated particle layer which has a different range of porosity. So the diffusivity within the membrane layer is referred to as hindered back diffusion. Osmotic pressure model and gel polarization model have been considered for batch and continuous mode operation. Silica suspension has been simulated with totally retentive membrane and dextran solution is simulated with partially retentive membrane in batch and continuous mode, respectively. The effect of applied pressure, stirring speed, and initial feed concentration on permeate flux, membrane surface concentration, permeate concentration, and true and observed rejection have been studied. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801293d

Separation of hg(II) from Its aqueous solution using bulk liquid membrane / Ameer Basha Shaik in Industrial & engineering chemistry research, Vol. 49 N° 6 (Mars 2010)

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 2889–2894 Titre : Separation of hg(II) from Its aqueous solution using bulk liquid membrane Type de document : texte imprimé Auteurs : Ameer Basha Shaik, Auteur ; Kabita Chakrabarty, Auteur ; Prabirkumar Saha, Auteur Année de publication : 2010 Article en page(s) : pp. 2889–2894 Note générale : Industrial Chemistry Langues : Anglais (eng) Résumé : The focus of this paper is the separation of Hg(II) ions in anionic form from its aqueous solution through bulk liquid membrane (BLM). The efficiency of transport and extraction of Hg (II) through BLM was probed under various experimental criteria such as choice of solvent, operating conditions, and configuration of the system that would render optimal functioning of the BLM. The solvent−carrier combination, dichloroethane−trioctylamine (TOA), shows promising result in the extraction of Hg(II). Investigation was carried out at various process conditions, such as different combinations of pH, initial feed and strip phase concentrations and carrier concentration, and their effects on the equilibrium distribution as well as on the transport of Hg(II) were studied. It was observed that mercury transport phenomenon highly dependent on feed phase pH. Increase of carrier concentration and strip phase concentration increases the transport of mercury up to a certain limit. Initial feed concentration has no significant effect on the extraction of mercury up to 1 mg L−1. Note de contenu : Biboigr. ISSN : 0888-5885 [article] Separation of hg(II) from Its aqueous solution using bulk liquid membrane [texte imprimé] / Ameer Basha Shaik, Auteur ; Kabita Chakrabarty, Auteur ; Prabirkumar Saha, Auteur . - 2010 . - pp. 2889–2894. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 6 (Mars 2010) . - pp. 2889–2894 Résumé : The focus of this paper is the separation of Hg(II) ions in anionic form from its aqueous solution through bulk liquid membrane (BLM). The efficiency of transport and extraction of Hg (II) through BLM was probed under various experimental criteria such as choice of solvent, operating conditions, and configuration of the system that would render optimal functioning of the BLM. The solvent−carrier combination, dichloroethane−trioctylamine (TOA), shows promising result in the extraction of Hg(II). Investigation was carried out at various process conditions, such as different combinations of pH, initial feed and strip phase concentrations and carrier concentration, and their effects on the equilibrium distribution as well as on the transport of Hg(II) were studied. It was observed that mercury transport phenomenon highly dependent on feed phase pH. Increase of carrier concentration and strip phase concentration increases the transport of mercury up to a certain limit. Initial feed concentration has no significant effect on the extraction of mercury up to 1 mg L−1. Note de contenu : Biboigr. ISSN : 0888-5885

Transportation of catechin (±C) using physiologically benign vegetable oil as liquid membrane / Mriganka Sekhar Manna in Industrial & engineering chemistry research, Vol. 51 N° 46 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 15207–15216 Titre : Transportation of catechin (±C) using physiologically benign vegetable oil as liquid membrane Type de document : texte imprimé Auteurs : Mriganka Sekhar Manna, Auteur ; Kamal Kumar Bhatluri, Auteur ; Prabirkumar Saha, Auteur Année de publication : 2013 Article en page(s) : pp. 15207–15216 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Vegetable  oil  Liquid  membrane Résumé : This paper presents an experimental study on the simultaneous extraction and recovery of catechin through bulk liquid membrane (BLM). Various environmentally benign solvents, namely vegetable oils, have been used as liquid membrane along with various transport-enhancing carrier agents to identify the best solute–carrier combination that would yield optimum performance of the BLM. Tributyl phosphate (TBP) (carrier) in sunflower oil (SFO) (solvent) is found to be the best among the tested combinations. Initially two-phase (feed–membrane) equilibrium studies have been carried out in order to study the effects of operating conditions, namely pH, temperature, initial feed concentration, and carrier concentration, on the equilibrium distribution. Based on these results, simultaneous extraction and recovery of the catechin have been carried out in a BLM type liquid membrane configuration using ethanol as the stripping agent and the optimum operating conditions are redefined accordingly. Seventy percent extraction and 44% recovery of the catechin have been achieved respectively at the optimum conditions of the parameters namely 0.36 M TBP in the membrane phase, 0.2 M ethanol as stripping agent, 400 rpm stirring speed, and 25 °C temperature from an initial aqueous feed of 4.0 pH and 100 mg L–1 concentration. Maximum fluxes of the extraction and recovery were found as 5.7 × 10–9 g cm–2 s–1 and 4.9× 10–9 g cm–2 s–1, respectively. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3017863 [article] Transportation of catechin (±C) using physiologically benign vegetable oil as liquid membrane [texte imprimé] / Mriganka Sekhar Manna, Auteur ; Kamal Kumar Bhatluri, Auteur ; Prabirkumar Saha, Auteur . - 2013 . - pp. 15207–15216. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 15207–15216 Mots-clés : Vegetable  oil  Liquid  membrane Résumé : This paper presents an experimental study on the simultaneous extraction and recovery of catechin through bulk liquid membrane (BLM). Various environmentally benign solvents, namely vegetable oils, have been used as liquid membrane along with various transport-enhancing carrier agents to identify the best solute–carrier combination that would yield optimum performance of the BLM. Tributyl phosphate (TBP) (carrier) in sunflower oil (SFO) (solvent) is found to be the best among the tested combinations. Initially two-phase (feed–membrane) equilibrium studies have been carried out in order to study the effects of operating conditions, namely pH, temperature, initial feed concentration, and carrier concentration, on the equilibrium distribution. Based on these results, simultaneous extraction and recovery of the catechin have been carried out in a BLM type liquid membrane configuration using ethanol as the stripping agent and the optimum operating conditions are redefined accordingly. Seventy percent extraction and 44% recovery of the catechin have been achieved respectively at the optimum conditions of the parameters namely 0.36 M TBP in the membrane phase, 0.2 M ethanol as stripping agent, 400 rpm stirring speed, and 25 °C temperature from an initial aqueous feed of 4.0 pH and 100 mg L–1 concentration. Maximum fluxes of the extraction and recovery were found as 5.7 × 10–9 g cm–2 s–1 and 4.9× 10–9 g cm–2 s–1, respectively. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3017863