Effect of Citric Acid Addition on Co−Mo/B2O3/Al2O3 Catalysts Prepared by a Post-Treatment Method / Nino Rinaldi in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10414–10424 Titre : Effect of Citric Acid Addition on Co−Mo/B2O3/Al2O3 Catalysts Prepared by a Post-Treatment Method Type de document : texte imprimé Auteurs : Nino Rinaldi, Auteur ; Tekeshi Kubota, Auteur ; Yasuaki Okamoto, Auteur Année de publication : 2010 Article en page(s) : pp. 10414–10424 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Effect--Citric--Acid Addition--Co−  Mo/B2O3/Al2O3--Catalysts--Prepared--Post-Treatment--Method Résumé : Co−Mo/B2O3/Al2O3 catalysts were prepared by a post-treatment of the calcined states with citric acid (CA) and were tested for the hydrodesulfurization (HDS) reaction of thiophene. The catalysts were characterized by LRS, UV−visible spectroscopy, Mo K-edge EXAFS, TEM, NO adsorption capacity, and surface area measurements. Catalysts obtained by simultaneous impregnation with citric acid were also prepared for comparison. Sulfided catalysts were characterized by a chemical vapor deposition (CVD) technique using Co(CO)3NO. The addition of citric acid in a post-treatment more effectively increased the catalytic activity and NO adsorption capacity than did addition by a simultaneous-impregnation method. Co-CA and Mo-CA surface complexes formed at the expense of CoMoO4 and polymolybdates. The maximum potential activity of Co−Mo/B2O3/Al2O3 was obtained by a simple post-treatment of the calcined catalyst with citric acid. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9008343 [article] Effect of Citric Acid Addition on Co−Mo/B2O3/Al2O3 Catalysts Prepared by a Post-Treatment Method [texte imprimé] / Nino Rinaldi, Auteur ; Tekeshi Kubota, Auteur ; Yasuaki Okamoto, Auteur . - 2010 . - pp. 10414–10424. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10414–10424 Mots-clés : Effect--Citric--Acid Addition--Co−  Mo/B2O3/Al2O3--Catalysts--Prepared--Post-Treatment--Method Résumé : Co−Mo/B2O3/Al2O3 catalysts were prepared by a post-treatment of the calcined states with citric acid (CA) and were tested for the hydrodesulfurization (HDS) reaction of thiophene. The catalysts were characterized by LRS, UV−visible spectroscopy, Mo K-edge EXAFS, TEM, NO adsorption capacity, and surface area measurements. Catalysts obtained by simultaneous impregnation with citric acid were also prepared for comparison. Sulfided catalysts were characterized by a chemical vapor deposition (CVD) technique using Co(CO)3NO. The addition of citric acid in a post-treatment more effectively increased the catalytic activity and NO adsorption capacity than did addition by a simultaneous-impregnation method. Co-CA and Mo-CA surface complexes formed at the expense of CoMoO4 and polymolybdates. The maximum potential activity of Co−Mo/B2O3/Al2O3 was obtained by a simple post-treatment of the calcined catalyst with citric acid. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9008343

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