Complete oxidation of benzene with cobalt oxide and ceria using the mesoporous support SBA-16

• Published in: Applied catalysis. A, General Vol. 467; pp. 1 - 6
• Main Authors: Zuo, Shufeng, Liu, Fujian, Tong, Jing, Qi, Chenze
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 02-10-2013; Elsevier
• Subjects: Benzene; Catalysis; Catalysts; Catalytic activity; Catalytic oxidation; Cerium oxide; Chemistry; Co/Ce catalysts; Cobalt oxides; Colloidal state and disperse state; Dispersions; Exact sciences and technology; General and physical chemistry; Mesoporous materials; Oxidation; Porous materials; SBA-16; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; SBA-16; Catalytic oxidation; Mesoporous materials; Benzene; Co/Ce catalysts; Cobalt oxide; Binary compound; Catalytic reaction; Support; Cerium oxide; Porous material; Mesoporosity; Lanthanide compound; Heterogeneous catalysis; Oxidation; Catalyst
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/j.apcata.2013.06.056

•SBA-16 and CoCe/SBA-16 structures are characteristic of a cubic Im3m symmetry.•A highly regular mesoporous structure, high SBET and Dv exist in the catalysts.•Addition of ceria can greatly improve the oxidation properties compared to Co/SBA-16.•CoCe(18:1)/SBA-16 exhibits the highest catalytic activity for benzene oxidation at 265°C.
In this investigation, SBA-16 was used to support metal (M=Cr, Mn, Fe, Co, Ni, Cu) oxides and ceria catalysts for the complete oxidation of benzene. The influence of a ceria promoter on the structure of SBA-16 and the catalytic performance of Co/SBA-16 were investigated. Mesoporous SBA-16 was found to have high surface area (472.1m2/g) and large pore volume (0.69cm3/g). The mesoporous, cage-like structure of SBA-16 was maintained throughout the preparation of CoCe supported catalysts. The addition of ceria promoted the reduction of cobalt oxide at a lower temperature and greatly affected its catalytic activity. These effects could be attributed to the good dispersion of Co3O4 on SBA-16 and the strong interaction between Co3O4 and CeO2. Catalysts with appropriate Ce greatly enhanced the activity of Co/SBA-16 for complete benzene oxidation; the catalyst CoCe(18:1)/SBA-16 exhibited the highest activity at 265°C. The high catalytic activity can likely be attributed to the high dispersion of Co3O4 on SBA-16, the high SBET, and the strong interaction between Co3O4 and CeO2.