Novel supports for nickel-based catalysts for the partial oxidation of methane |
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| Authors: | Guillermo Paternina Berrocal Andre L. M. Da Silva José M. Assaf Alberto Albornoz Maria do Carmo Rangel |
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| Affiliation: | 1. GECCAT, Instituto de Química, Universidade Federal da Bahia. Rua Barão de Geremoabo, s/n, Campus Universitário de Ondina, Federação, 40170-290, Salvador, Bahia, Brazil;2. Laboratório de Catalise, Departamento de Engenharia Química, Universidade Federal de São Carlos, São Paulo, Brazil;3. Centro de Química, Instituto Venezolano de Investigaciones Cientificas – IVIC, 21827, Caracas, Venezuela;1. Boreskov Institute of Catalysis SB RAS, pr. Akademika Lavrentieva 5, 630090 Novosibirsk, Russia;2. Instituto de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, 28049 Madrid, Spain;3. Institute of Coal Chemistry and Material Science SB RAS, pr. Sovetskiy 18, 650000 Kemerovo, Russia;1. KTH – Royal Institute of Technology, School of Chemical Science and Engineering, Chemical Technology, Teknikringen 42, SE-100 44 Stockholm, Sweden;2. UMSA – Universidad Mayor de San Andrés, Instituto del Gas Natural, Campus Universitario, Cota-Cota, Calle No. 27, La Paz, Bolivia;1. Department of Chemical Engineering, Aristotle University of Thessaloniki, University Campus, GR-54124 Thessaloniki, Greece;2. ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Technical Unit for Renewable Energy Sources (UTRINN), via Anguillarese 301, 00123 Rome, Italy;1. Catalyst and Advanced Materials Research Laboratory, Chemical Engineering Department, Faculty of Engineering, University of Kashan, Kashan, Iran;2. Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, Iran;1. Fuels and Energy Technology Institute, Curtin University, Perth, WA, 6845, Australia;2. John de Laeter Centre, Curtin University, Perth, WA, 6102, Australia;3. School of Material Science and Engineering, University of Jinan, Jinan, 250022, China;4. Key Lab of Design & Assembly of Functional Nanostructure, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road, Fuzhou, 350002, China;5. Department of Physics and Astronomy, Curtin University, Perth, WA, 6102, Australia |
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| Abstract: | Zirconia-supported nickel catalysts with different amounts of aluminum (Al/Zr = 0.2, 1 and 2) were studied in this work in order to find alternative supports for nickel-based catalysts for the partial oxidation of methane. This reaction is a promising route for producing hydrogen and syngas for different applications. Samples were prepared by precipitation and impregnation techniques, characterized by several techniques and evaluated in the partial oxidation of methane in the range of 450–750 °C and 1 atm. It was found that aluminum affects the textural and catalytic properties of zirconia-supported nickel catalysts. The tetragonal phase of zirconia was stabilized by aluminum and gamma-alumina was also found in the aluminum-richest samples. Aluminum increased the porosity and the specific surface area of the solids. The catalytic activity also increased with the amount of aluminum in solids probably due to the stronger interaction of nickel with the support, which slowly generates active sites during the reduction step. The methane conversion and hydrogen selectivity increased with temperature, indicating no deactivation. The hydrogen to carbon monoxide molar ratio decreased due to aluminum but was not significantly affected by temperature. The coke produced was not harmful to the catalysts and aluminum affected its amount, although no simple relationship was found between these parameters. The most promising catalyst was the sample with aluminum to zirconium molar ratio of 2, which showed high activity and hydrogen selectivity and was stable under the reaction condition. |
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