NDLI: Ni and/or Ni–Cu alloys supported over SiO<sub>2</sub> catalysts synthesized <i>via</i> phyllosilicate structures for steam reforming of biomass tar reaction

Content Provider	Royal Society of Chemistry (RSC)
Author	Ang, M. L. Kawi, S. Kathiraser, Y. Ashok, J.
Copyright Year	2015
Abstract	In this paper, we describe the synthesis of Ni/SiO2 and Ni–Cu/SiO2 catalysts derived from phyllosilicate structures (Ni/SiO2P and Ni–Cu/SiO2P, respectively) for steam reforming of biomass tar reaction. The steam reforming of biomass tar reaction was investigated with cellulose as a biomass model compound. The influence of steam-to-carbon ratio and reaction temperatures was also explored. Overall, the catalysts synthesized via phyllosilicate structures gave better catalytic performance than the catalysts prepared by the impregnation method. An optimum catalyst composition of 30Ni–5Cu/SiO2P gave superior catalytic performance in terms of stability and activity compared to all other catalysts. At 600 °C, about 78% of biomass was converted to gaseous products over 30Ni–5Cu/SiO2P, which is the highest among all the catalysts tested. Temperature-programmed reduction results indicate that the metal–support interaction of Ni/SiO2P catalyst prepared via phyllosilicate structures is stronger due to the unique layered structure compared to that prepared by conventional impregnation (10Ni/SiO2). The formation of a unique layered structure in Ni/SiO2P and Ni–Cu/SiO2P was also confirmed through TEM analysis. The surface elemental composition results obtained from XPS analysis show that the Cu/Ni surface molar ratio for Ni–Cu/SiO2P catalysts is consistent with the actual molar ratio values obtained from SEM-EDX analysis. This result suggests that the bimetallic catalysts synthesized via the phyllosilicate structure route can yield uniformly distributed alloy species.
Starting Page	4398
Ending Page	4409
Page Count	12
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	5
Issue Number	9
Journal	Catalysis Science & Technology
DOI	10.1039/c5cy00650c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Temperature-programmed reduction Transmission electron microscopy Cellulose Steam reforming Biomass Concentration Silicate minerals
Content Type	Text
Resource Type	Article
Subject	Catalysis

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