Journal
APPLIED CATALYSIS A-GENERAL
Volume 431, Issue -, Pages 49-56Publisher
ELSEVIER
DOI: 10.1016/j.apcata.2012.04.016
Keywords
Methane; Tri-reforming; TPR; TPD; Nickel; Water-gas shift
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Funding
- Consejeria de Ciencia y Tecnologia de la Junta de Comunidades de Castilla-La Mancha [PPII10-0045-5875]
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The aim of the work described here is to evaluate the catalytic performance in the tri-reforming process of Ni/CeO2 and Ni/beta-SiC catalysts prepared by using four different nickel salts (nitrate, acetate, chloride and citrate). Metal particles supported over ceria had bigger particle sizes (leading to lower metal-support interactions) than those supported on beta-SiC. It was also demonstrated that the metal salt used in the preparation of Ni-based catalysts had a marked influence on the size of the nickel particles. Larger particles with a worse catalytic behaviour were obtained when nickel chloride and nickel citrate were used as the precursors of Ni supported species. Methane consumption rate and H-2/CO ratio in the effluents were influenced by the type of support and salt precursor used in the preparation of the catalysts. CO2-TPD proved that catalysts based on ceria as the support presented more basic sites, which was related to a decrease of the H-2/CO molar ratio in the effluents coming from the reactor. High methane consumption rate and good catalytic stability were obtained when nickel nitrate and nickel acetate were used to prepare Ni/beta-SiC catalysts. The results showed that these latter catalysts can be considered as promising ones for the tri-reforming process. (c) 2012 Elsevier B.V. All rights reserved.
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