| Titre : | Effect of Citric Acid Addition on Co−Mo/B2O3/Al2O3 Catalysts Prepared by a Post-Treatment Method (2010) |
| Auteurs : | Nino Rinaldi, Auteur ; Tekeshi Kubota, Auteur ; Yasuaki Okamoto, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N° 23, Décembre 2009) |
| Article en page(s) : | pp. 10414–10424 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | 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 |
