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Role of support in hydrotreatment of jatropha oil over sulfided NiMo catalysts / Shaofeng Gong in Industrial & engineering chemistry research, Vol. 51 N° 43 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 43 (Octobre 2012) . - pp. 13953–13960 Titre : Role of support in hydrotreatment of jatropha oil over sulfided NiMo catalysts Type de document : texte imprimé Auteurs : Shaofeng Gong, Auteur ; Akira Shinozaki, Auteur ; Eika W. Qian, Auteur Année de publication : 2013 Article en page(s) : pp. 13953–13960 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hydrotreatment  Catalysts Résumé : Hydrotreatment of jatropha oil over a series of sulfided NiMo/SiO2–Al2O3 and NiMo/ZSM-5–Al2O3 catalysts in a fixed-bed reactor was carried out. Effect of support on various reactions occurring in hydrotreatment was investigated. For NiMo/SiO2–Al2O3 series catalysts, the rates of decarboxylation and/or decarbonylation increased with increasing Si/(Si+Al) ratio, while the ratio of hydrodeoxygenation decreased with increasing Si/(Si+Al) ratio. For NiMo/ZSM-5–Al2O3 series catalysts, with increasing amounts of ZSM-5, the rate of decarboxylation and/or decarbonylation versus hydrodeoxygenation did not change. These results could be attributed to the total acidic sites of catalyst having a positive effect on the decarboxylation and/or decarbonylation pathways. NiMo/SiO2–Al2O3 catalysts showed a much higher isomerization/cracking ratio than NiMo/ZSM-5–Al2O3 catalysts. It was suggested that isomerization reaction was favorable for weak and middle acidic sites but cracking reaction was favorable for strong acidic sites. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301204u [article] Role of support in hydrotreatment of jatropha oil over sulfided NiMo catalysts [texte imprimé] / Shaofeng Gong, Auteur ; Akira Shinozaki, Auteur ; Eika W. Qian, Auteur . - 2013 . - pp. 13953–13960. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 43 (Octobre 2012) . - pp. 13953–13960 Mots-clés : Hydrotreatment  Catalysts Résumé : Hydrotreatment of jatropha oil over a series of sulfided NiMo/SiO2–Al2O3 and NiMo/ZSM-5–Al2O3 catalysts in a fixed-bed reactor was carried out. Effect of support on various reactions occurring in hydrotreatment was investigated. For NiMo/SiO2–Al2O3 series catalysts, the rates of decarboxylation and/or decarbonylation increased with increasing Si/(Si+Al) ratio, while the ratio of hydrodeoxygenation decreased with increasing Si/(Si+Al) ratio. For NiMo/ZSM-5–Al2O3 series catalysts, with increasing amounts of ZSM-5, the rate of decarboxylation and/or decarbonylation versus hydrodeoxygenation did not change. These results could be attributed to the total acidic sites of catalyst having a positive effect on the decarboxylation and/or decarbonylation pathways. NiMo/SiO2–Al2O3 catalysts showed a much higher isomerization/cracking ratio than NiMo/ZSM-5–Al2O3 catalysts. It was suggested that isomerization reaction was favorable for weak and middle acidic sites but cracking reaction was favorable for strong acidic sites. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301204u