Documents disponibles écrits par cet auteur

Catalytic degradation of high-density polyethylene in a reactive extruder / Michael D. Wallis in Industrial & engineering chemistry research, Vol. 47 n°15 (Août 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°15 (Août 2008) . - p. 5175–5181 Titre : Catalytic degradation of high-density polyethylene in a reactive extruder Type de document : texte imprimé Auteurs : Michael D. Wallis, Auteur ; Sandeep Sarathy, Auteur ; Suresh K. Bhatia, Auteur ; P. Massarotto, Auteur Année de publication : 2008 Article en page(s) : p. 5175–5181 Note générale : Bibliogr. p. 5181 Langues : Anglais (eng) Mots-clés : High-density  polyethylene  --  degradation;  Reactive  extruder;  Silica−alumina Résumé : The catalytic degradation of high-density polyethylene was conducted in a reactive extruder at reaction temperatures of 425, 450, and 475 °C using silica−alumina as the cracking catalyst. A continuous kinetic model was proposed and compared to the carbon number distribution of the reaction products. The model prediction of the product selectivity described the experimental data well for a reaction temperature of 425 °C; however, it was too simplistic to predict the decrease in C4 and increase in C3 occurring at higher reaction temperatures. The liquid product obtained from the reactive extruder was comparable to gasoline; however, it did show a significantly higher C5 fraction. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0714450 [article] Catalytic degradation of high-density polyethylene in a reactive extruder [texte imprimé] / Michael D. Wallis, Auteur ; Sandeep Sarathy, Auteur ; Suresh K. Bhatia, Auteur ; P. Massarotto, Auteur . - 2008 . - p. 5175–5181. Bibliogr. p. 5181 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°15 (Août 2008) . - p. 5175–5181 Mots-clés : High-density  polyethylene  --  degradation;  Reactive  extruder;  Silica−alumina Résumé : The catalytic degradation of high-density polyethylene was conducted in a reactive extruder at reaction temperatures of 425, 450, and 475 °C using silica−alumina as the cracking catalyst. A continuous kinetic model was proposed and compared to the carbon number distribution of the reaction products. The model prediction of the product selectivity described the experimental data well for a reaction temperature of 425 °C; however, it was too simplistic to predict the decrease in C4 and increase in C3 occurring at higher reaction temperatures. The liquid product obtained from the reactive extruder was comparable to gasoline; however, it did show a significantly higher C5 fraction. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0714450

Improvement of para-xylene SMB process performance on an industrial scale / Young-Il Lim in Industrial & engineering chemistry research, Vol. 49 N° 7 (Avril 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3316–3327 Titre : Improvement of para-xylene SMB process performance on an industrial scale Type de document : texte imprimé Auteurs : Young-Il Lim, Auteur ; Jinsuk Lee, Auteur ; Suresh K. Bhatia, Auteur Année de publication : 2010 Article en page(s) : pp. 3316–3327 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : para-Xylene  SMB  Industrial Résumé : Dead volume classified as bed head, bed tail, and bed line affects the purity and recovery in industrial-scale simulated-moving-bed (SMB) processes. Considering the three types of dead volume, the operation strategies for four, seven, and eight zones are presented for an industrial-scale para-xylene (PX) SMB process, and their performances are compared in terms of purity, recovery, and dilution. The dead volume is treated by a Courant−Friedrichs−Lewy- (CFL-) number-insensitive method of characteristics (MOC). An extended node model integrating the dead volumes has been developed and solved by using the MOC. Seven-zone operation including line and secondary flushes enhances the purity, while keeping almost the same recovery as achieved with four-zone operation. The secondary flush introducing pure PX reduces the dilution of the extract. Eight-zone operation with both a secondary flush introducing pure PX and a tertiary flush-out shows high productivity with low dilution and over 99.7% purity. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901097z [article] Improvement of para-xylene SMB process performance on an industrial scale [texte imprimé] / Young-Il Lim, Auteur ; Jinsuk Lee, Auteur ; Suresh K. Bhatia, Auteur . - 2010 . - pp. 3316–3327. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 7 (Avril 2010) . - pp. 3316–3327 Mots-clés : para-Xylene  SMB  Industrial Résumé : Dead volume classified as bed head, bed tail, and bed line affects the purity and recovery in industrial-scale simulated-moving-bed (SMB) processes. Considering the three types of dead volume, the operation strategies for four, seven, and eight zones are presented for an industrial-scale para-xylene (PX) SMB process, and their performances are compared in terms of purity, recovery, and dilution. The dead volume is treated by a Courant−Friedrichs−Lewy- (CFL-) number-insensitive method of characteristics (MOC). An extended node model integrating the dead volumes has been developed and solved by using the MOC. Seven-zone operation including line and secondary flushes enhances the purity, while keeping almost the same recovery as achieved with four-zone operation. The secondary flush introducing pure PX reduces the dilution of the extract. Eight-zone operation with both a secondary flush introducing pure PX and a tertiary flush-out shows high productivity with low dilution and over 99.7% purity. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901097z