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Steam reforming of tar from pyrolysis of biomass over Ni/Mg/Al catalysts prepared from hydrotalcite-like precursors

Paper ID Volume ID Publish Year Pages File Format Full-Text
47119 46459 2011 11 PDF Available
Title
Steam reforming of tar from pyrolysis of biomass over Ni/Mg/Al catalysts prepared from hydrotalcite-like precursors
Abstract

The Ni/Mg/Al catalysts were prepared from the calcination and reduction of hydrotalcite-like compounds containing Ni, Mg and Al, and applied to the steam reforming of tar from pyrolysis of biomass. The dependence of the composition and reduction pretreatment conditions on the catalytic performance was investigated. It is found that the Ni/Mg/Al catalyst with optimized composition of Ni/Mg/Al = 9/66/25 exhibited much higher activity, resistance to coke deposition, and stability than Al2O3- and MgO-supported Ni catalysts. The catalyst characterization using XRD, TPR, N2 and H2 adsorption, and TEM indicates that the Ni/Mg/Al catalyst after the reduction has a nanocomposite structure of Ni metal particles (about 8.5 nm) and Mg(Ni, Al)O particles (about 11.5 nm). Even after the catalytic use, the nanocomposite structure was maintained. High performance of the Ni/Mg/Al catalyst including the suppression of the aggregation of the metal particles can be caused by the nanocomposite structure.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ Calcination–reduction of the hydrotalcite precursors gives Ni/Mg/Al catalysts. ▶ The optimized Ni/Mg/Al showed high activity and stability in tar steam reforming. ▶ The Ni/Mg/Al catalyst has a nanocomposite consisted of Ni particles and Mg(Ni, Al)O. ▶ The aggregation of Ni particles and coke deposition were suppressed on this catalyst.

Keywords
Steam reforming; Tar; Biomass; Synthesis gas; Hydrotalcite
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Steam reforming of tar from pyrolysis of biomass over Ni/Mg/Al catalysts prepared from hydrotalcite-like precursors
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 102, Issues 3–4, 22 February 2011, Pages 528–538
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
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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