Oxidative steam reforming of ethanol on mesoporous silica supported PtNi/CeO2 catalysts |
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| Affiliation: | 1. Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy;1. Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II 132, 83040 Fisciano, SA, Italy;2. Fraunhofer-Institut für Keramische Technologien und Systeme, IKTS, Winterbergstrasse 28, 01277 Dresden, Germany;1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing, 100085, China;2. Institute of Rare Earth Metallurgical Materials, General Research Institute for Non-Ferrous Metals, Beijing, 100088, China;3. School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China;4. Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China;5. University of Chinese Academy of Sciences, Beijing, 100049, China;1. Department of Applied Chemistry, National Chiao Tung University, 1001 University Rd., Hsinchu 30010, Taiwan;2. Graduate Degree Program of Science and Technology of Accelerator Light Source, National Chiao-Tung University, Hsinchu 30010, Taiwan;1. Instituto de Desarrollo Tecnológico para la Industria Química, UNL-CONICET, 3000, Santa Fe, Argentina;2. Facultad de Ingeniería y Ciencias Hídricas, Universidad Nacional del Litoral, Ciudad Universitaria, Ruta Nacional N° 168 - Km 472,4, 3000, Santa Fe, Argentina;3. Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Universidad de Cádiz, Campus Universitario de Puerto Real, 11510, Puerto Real, Cádiz, Spain;4. Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santiago del Estero 2829, 3000, Santa Fe, Argentina |
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| Abstract: | In order to assure good catalyst stability and low carbon deposition rate, in the present work three catalysts having different CeO2 loadings (CeO2/SiO2 ratio ranging between 25 and 40%) were prepared by depositing Pt and Ni over a CeO2/SiO2 mixed support and tested for oxidative steam reforming of ethanol. All the catalysts exhibited total ethanol conversion between 350 and 600 °C; however, the CeO2/SiO2 ratio strongly affected catalyst stability at 500 °C: despite the similar hydrogen yields (almost 40%), the best sample, which displayed the lowest carbon formation rate (1.2 × 10?6 gcoke/(gcat*gcarbon,fed*h)) and stable behaviour for 135 h, was the 3wt%Pt-10wt%Ni/30CeO2/SiO2. The lower dimension for Ni crystallites was measured over the latter exhausts catalyst and the dependence of carbon formation rate form such parameter was identified. Anyway, the carbon selectivities measured over all the investigated samples were significantly lower than the values reported in the recent literature. |
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| Keywords: | Hydrogen Ethanol reforming Ceria Carbon deposition |
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