Present and future alkylation processes in refineries / Albright, Lyle F. in Industrial & engineering chemistry research, Vol. 48 N°3 (Février 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1409–1413 Titre : Present and future alkylation processes in refineries Type de document : texte imprimé Auteurs : Albright, Lyle F., Auteur Année de publication : 2009 Article en page(s) : p. 1409–1413 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Gasolines Refineries -- alkylation Résumé : Isobutane has been alkylated with light (C3−C5) olefins for many years to produce high-quality, clean-burning gasolines. Processes that will significantly reduce operating costs and also produce higher-quality gasolines are proposed. These recommendations are based on recent improved understanding of process fundamentals, including the complicated chemical steps and the physical steps between and near the two or more phases in the reactor. Processes using sulfuric acid can be modified to reduce acid consumption significantly. Several solid catalysts have recently been proposed. All exhibit rapid catalyst deactivation for reasons explained in this article. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801495p [article] Present and future alkylation processes in refineries [texte imprimé] / Albright, Lyle F., Auteur . - 2009 . - p. 1409–1413. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1409–1413 Mots-clés : Gasolines Refineries -- alkylation Résumé : Isobutane has been alkylated with light (C3−C5) olefins for many years to produce high-quality, clean-burning gasolines. Processes that will significantly reduce operating costs and also produce higher-quality gasolines are proposed. These recommendations are based on recent improved understanding of process fundamentals, including the complicated chemical steps and the physical steps between and near the two or more phases in the reactor. Processes using sulfuric acid can be modified to reduce acid consumption significantly. Several solid catalysts have recently been proposed. All exhibit rapid catalyst deactivation for reasons explained in this article. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801495p

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Pretreatments of coils to minimize Coke formation in ethylene furnaces / Zhang, Zhaobin in Industrial & engineering chemistry research, Vol. 49 N° 4 (Fevrier 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1991–1994 Titre : Pretreatments of coils to minimize Coke formation in ethylene furnaces Type de document : texte imprimé Auteurs : Zhang, Zhaobin, Auteur ; Albright, Lyle F., Auteur Année de publication : 2010 Article en page(s) : pp 1991–1994 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Pretreatments coils Coke Ethylene furnaces. Résumé : Numerous techniques have been considered on how to reduce coke formation and/or coke collection on the inner surfaces of the coils in furnaces producing ethylene, propylene, etc. Such reduction would lead to several beneficial events including much reduced production costs. The techniques tested by Nova Chemical in several of their furnaces have resulted in a major reduction of coke. They have tested several pretreatments of the coils in their furnaces using several oxidizing gases at 800−1200 °C. For example, hydrogen/steam mixtures have been employed. Various pretreatments have been employed in the current study that suggest improved pretreatments are now possible. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900271q [article] Pretreatments of coils to minimize Coke formation in ethylene furnaces [texte imprimé] / Zhang, Zhaobin, Auteur ; Albright, Lyle F., Auteur . - 2010 . - pp 1991–1994. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 4 (Fevrier 2010) . - pp 1991–1994 Mots-clés : Pretreatments coils Coke Ethylene furnaces. Résumé : Numerous techniques have been considered on how to reduce coke formation and/or coke collection on the inner surfaces of the coils in furnaces producing ethylene, propylene, etc. Such reduction would lead to several beneficial events including much reduced production costs. The techniques tested by Nova Chemical in several of their furnaces have resulted in a major reduction of coke. They have tested several pretreatments of the coils in their furnaces using several oxidizing gases at 800−1200 °C. For example, hydrogen/steam mixtures have been employed. Various pretreatments have been employed in the current study that suggest improved pretreatments are now possible. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900271q

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