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Valorization of waste agricultural polyethylene film by sequential pyrolysis and catalytic reforming / Guillermo San Miguel 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. 8697–8703 Titre : Valorization of waste agricultural polyethylene film by sequential pyrolysis and catalytic reforming Type de document : texte imprimé Auteurs : Guillermo San Miguel, Auteur ; David P. Serrano, Auteur ; José Aguado, Auteur Année de publication : 2010 Article en page(s) : pp. 8697–8703 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Agriculture  film  waste  Sequential  pyrolysis  Catalytic  reforming Résumé : This paper deals with the potential of using sequential pyrolysis and catalytic reforming for the conversion of agriculture film waste into useful hydrocarbon products. The experiments were conducted in a two-step reaction system consisting of a pyrolytic batch reactor (450 °C) connected in series to a secondary fixed bed reactor where the organic vapors were reformed at temperatures between 425 and 475 °C. Two conventional zeolites (HZSM-5 and Beta) and a mesostructured aluminosilicate Al-MCM-41 were used as catalysts in the reforming stage. Conversion values were not affected by the temperature in the reforming stage and remained fairly constant in all the experiments (89−92 wt %). In the absence of catalyst, the process generated a high proportion of hydrocarbons in the gasoline (C5−C12) and diesel (>C13) range (between 51 and 56 wt % and between 18 and 19 wt %, respectively) and a consequently lower amount of light hydrocarbon products (between 17 and 23 wt %), all of which consisted essentially of a mixture of n-paraffins and olefins. Catalytic reforming over HZSM-5 favored the formation of light hydrocarbons (up to 53 wt %) consisting primarily of C3 and C4 olefins. Catalytic reforming over HZSM-5 also favored the formation of aromatics (up to 12.7 wt %), iso-parafins (8.9 wt %), and naphthenes (4.0 wt %) in the gasoline (C5−C12) fraction. Owing to their weaker acid properties, zeolite Beta and Al-MCM-41 exhibited inferior reforming activities to zeolite HZSM-5, as evidenced by the lower proportion of light hydrocarbons products and the reduced concentration of nonparaffinic products in the heavier fractions. The influence of reforming temperature on product distribution was not significant in the range 425−475 °C. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900776w [article] Valorization of waste agricultural polyethylene film by sequential pyrolysis and catalytic reforming [texte imprimé] / Guillermo San Miguel, Auteur ; David P. Serrano, Auteur ; José Aguado, Auteur . - 2010 . - pp. 8697–8703. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8697–8703 Mots-clés : Agriculture  film  waste  Sequential  pyrolysis  Catalytic  reforming Résumé : This paper deals with the potential of using sequential pyrolysis and catalytic reforming for the conversion of agriculture film waste into useful hydrocarbon products. The experiments were conducted in a two-step reaction system consisting of a pyrolytic batch reactor (450 °C) connected in series to a secondary fixed bed reactor where the organic vapors were reformed at temperatures between 425 and 475 °C. Two conventional zeolites (HZSM-5 and Beta) and a mesostructured aluminosilicate Al-MCM-41 were used as catalysts in the reforming stage. Conversion values were not affected by the temperature in the reforming stage and remained fairly constant in all the experiments (89−92 wt %). In the absence of catalyst, the process generated a high proportion of hydrocarbons in the gasoline (C5−C12) and diesel (>C13) range (between 51 and 56 wt % and between 18 and 19 wt %, respectively) and a consequently lower amount of light hydrocarbon products (between 17 and 23 wt %), all of which consisted essentially of a mixture of n-paraffins and olefins. Catalytic reforming over HZSM-5 favored the formation of light hydrocarbons (up to 53 wt %) consisting primarily of C3 and C4 olefins. Catalytic reforming over HZSM-5 also favored the formation of aromatics (up to 12.7 wt %), iso-parafins (8.9 wt %), and naphthenes (4.0 wt %) in the gasoline (C5−C12) fraction. Owing to their weaker acid properties, zeolite Beta and Al-MCM-41 exhibited inferior reforming activities to zeolite HZSM-5, as evidenced by the lower proportion of light hydrocarbons products and the reduced concentration of nonparaffinic products in the heavier fractions. The influence of reforming temperature on product distribution was not significant in the range 425−475 °C. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900776w