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Precursor influence and catalytic behaviour of Ni/CeO2 and Ni/SiC catalysts for the tri-reforming process

Paper ID Volume ID Publish Year Pages File Format Full-Text
40791 45866 2012 8 PDF Available
Title
Precursor influence and catalytic behaviour of Ni/CeO2 and Ni/SiC catalysts for the tri-reforming process
Abstract

The aim of the work described here is to evaluate the catalytic performance in the tri-reforming process of Ni/CeO2 and Ni/β-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 β-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 H2/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 H2/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/β-SiC catalysts. The results showed that these latter catalysts can be considered as promising ones for the tri-reforming process.

Graphical abstract.Figure optionsDownload full-size imageDownload high-quality image (243 K)Download as PowerPoint slideHighlights► Silicon carbide as a new support for the tri-reforming process. ► Nickel nitrate, nickel acetate, nickel chloride and nickel citrate as precursors. ► Nickel chloride produces larger particles with a lower interaction with the support. ► Basicity is affected by precursor and support ► H2/CO ratio is also affected by the support and by the particle size.

Keywords
Methane; Tri-reforming; TPR; TPD; Nickel; Water–gas shift
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Precursor influence and catalytic behaviour of Ni/CeO2 and Ni/SiC catalysts for the tri-reforming process
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 431–432, 26 July 2012, Pages 49–56
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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