Documents disponibles écrits par cet auteur

Application of principal component analysis for monitoring and disturbance detection of a hydrotreating process / Stella Bezergianni in Industrial & engineering chemistry research, Vol. 47 N°18 (Septembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 6972–6982 Titre : Application of principal component analysis for monitoring and disturbance detection of a hydrotreating process Type de document : texte imprimé Auteurs : Stella Bezergianni, Auteur ; Aggeliki Kalogianni, Auteur Année de publication : 2008 Article en page(s) : p. 6972–6982 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Principal  component  analysis  Multivariate  process Résumé : Principal component analysis (PCA) is a well-established technique for monitoring and disturbance detection of multivariate process, as it enables variability assessment through dimensionality reduction. PCA was applied to a hydroprocessing pilot plant to monitor the overall process variability. Contribution plots around points of increased variability were used to analyze process variability and its association with process variables. The methodology monitored successfully the set of 38 variables and diagnosed significant disturbances and their causes. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0714605 [article] Application of principal component analysis for monitoring and disturbance detection of a hydrotreating process [texte imprimé] / Stella Bezergianni, Auteur ; Aggeliki Kalogianni, Auteur . - 2008 . - p. 6972–6982. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 6972–6982 Mots-clés : Principal  component  analysis  Multivariate  process Résumé : Principal component analysis (PCA) is a well-established technique for monitoring and disturbance detection of multivariate process, as it enables variability assessment through dimensionality reduction. PCA was applied to a hydroprocessing pilot plant to monitor the overall process variability. Contribution plots around points of increased variability were used to analyze process variability and its association with process variables. The methodology monitored successfully the set of 38 variables and diagnosed significant disturbances and their causes. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie0714605

Catalytic hydrocracking of fresh and used cooking oil / Stella Bezergianni in Industrial & engineering chemistry research, Vol. 48 N° 18 (Septembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8402–8406 Titre : Catalytic hydrocracking of fresh and used cooking oil Type de document : texte imprimé Auteurs : Stella Bezergianni, Auteur ; Spyros Voutetakis, Auteur ; Aggeliki Kalogianni, Auteur Année de publication : 2010 Article en page(s) : pp. 8402–8406 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Vegetable  oils  Hydrocracking  Cracking  Heteroatom  removal  and  saturation  reaction  mechanisms Résumé : Hydrocracking of vegetable oils is a prominent technology for the production of biofuels. This work compares the product yields and quality of hydrocracking fresh and used cooking oil under nominal operating conditions. Cracking, heteroatom removal and saturation reaction mechanisms are evaluated for both feedstock types and for three typical hydrocracking temperatures. The assessment of both feedstocks indicates that they are both suitable for high diesel yields with smaller kerosene/jet and gasoline/naphtha yields. As temperature increases, diesel selectivity increases for both feedstock types. However, the used oil feedstock exhibits higher kerosene/jet and naphtha selectivity at low temperatures (350 °C) and lower at the highest hydrocracking temperature (390 °C). En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900445m [article] Catalytic hydrocracking of fresh and used cooking oil [texte imprimé] / Stella Bezergianni, Auteur ; Spyros Voutetakis, Auteur ; Aggeliki Kalogianni, Auteur . - 2010 . - pp. 8402–8406. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8402–8406 Mots-clés : Vegetable  oils  Hydrocracking  Cracking  Heteroatom  removal  and  saturation  reaction  mechanisms Résumé : Hydrocracking of vegetable oils is a prominent technology for the production of biofuels. This work compares the product yields and quality of hydrocracking fresh and used cooking oil under nominal operating conditions. Cracking, heteroatom removal and saturation reaction mechanisms are evaluated for both feedstock types and for three typical hydrocracking temperatures. The assessment of both feedstocks indicates that they are both suitable for high diesel yields with smaller kerosene/jet and gasoline/naphtha yields. As temperature increases, diesel selectivity increases for both feedstock types. However, the used oil feedstock exhibits higher kerosene/jet and naphtha selectivity at low temperatures (350 °C) and lower at the highest hydrocracking temperature (390 °C). En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900445m

Toward hydrotreating of waste cooking oil for biodiesel production. effect of pressure, H2/Oil ratio, and Liquid hourly space velocity / Stella Bezergianni in Industrial & engineering chemistry research, Vol. 50 N° 7 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 7 (Avril 2011) . - pp. 3874-3879 Titre : Toward hydrotreating of waste cooking oil for biodiesel production. effect of pressure, H2/Oil ratio, and Liquid hourly space velocity Type de document : texte imprimé Auteurs : Stella Bezergianni, Auteur ; Athanasios Dimitriadis, Auteur ; Aggeliki Kalogianni, Auteur Année de publication : 2011 Article en page(s) : pp. 3874-3879 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Production  Hydrotreating Résumé : This work focuses on the use of waste cooking oil (WCO) as the main feedstock for hydrotreatment to produce biodiesel. In this study three parameters are considered for evaluating the effectiveness of this technology, pressure, hydrogen-to-oil (H2/oil) ratio and liquid hourly space velocity (LHSV). For all experiments the same commercial hydrotreating catalyst was utilized. Hydrotreatment pressure, as a key parameter of hydrotreatment reactions, was initially studied via three experiments covering a range between 8.27 and 9.65 MPa. The H2/oil ratio was examined via three experiments between 543 and 890 N m3/m3 in order to evaluate its effect on biodiesel yield. Finally three different LHSVs (0.5, 1.0, and 1.5 h―1) were explored in order to study both hydrotreating catalyst effectiveness and catalyst life expectancy. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24027631 [article] Toward hydrotreating of waste cooking oil for biodiesel production. effect of pressure, H2/Oil ratio, and Liquid hourly space velocity [texte imprimé] / Stella Bezergianni, Auteur ; Athanasios Dimitriadis, Auteur ; Aggeliki Kalogianni, Auteur . - 2011 . - pp. 3874-3879. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 7 (Avril 2011) . - pp. 3874-3879 Mots-clés : Production  Hydrotreating Résumé : This work focuses on the use of waste cooking oil (WCO) as the main feedstock for hydrotreatment to produce biodiesel. In this study three parameters are considered for evaluating the effectiveness of this technology, pressure, hydrogen-to-oil (H2/oil) ratio and liquid hourly space velocity (LHSV). For all experiments the same commercial hydrotreating catalyst was utilized. Hydrotreatment pressure, as a key parameter of hydrotreatment reactions, was initially studied via three experiments covering a range between 8.27 and 9.65 MPa. The H2/oil ratio was examined via three experiments between 543 and 890 N m3/m3 in order to evaluate its effect on biodiesel yield. Finally three different LHSVs (0.5, 1.0, and 1.5 h―1) were explored in order to study both hydrotreating catalyst effectiveness and catalyst life expectancy. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24027631