Biogas reforming for hydrogen production over nickel and cobalt bimetallic catalysts

Xu, Jun; Zhou, Wei; Li, Zhaojing; Wang, Jihui; Ma, Jie

doi:10.1016/j.ijhydene.2009.06.038

Cited by 255 publications

(115 citation statements)

References 36 publications

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“…Most recently, different alternatives for biogas utilisation have been proposed such as biomethane production [2], combustion in a dual fuel diesel engine [3,4] or as feedstock in the dry reforming of CH 4 (DRM) [5,6]. In the latter case, high CO 2 concentration, up to 50%, makes biogas a perfect choice to be used as feedstock, resulting in a suitable syngas that can be used for hydrogen production [7,8], to feed a solid oxide fuel cell [9] or for hydrocarbons synthesis via the Fischer-Tropsch process [10]. Besides this, DRM using biogas can be classified as environmentally friendly due to the renewable character of the feedstock.…”

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confidence: 99%

Effect of the synthesis conditions of Ni/Al2O3 catalysts on the biogas decomposition to produce H2-rich gas and carbon nanofibers

Llobet

Pinilla

Moliner

et al. 2015

Applied Catalysis B: Environmental

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The utilization of biogas as carbon source for the co-production of filamentous-like materials and syngas is proposed. Catalysts with different Ni:Al molar ratios, Al 2 O 3 supports and preparation methods were synthesized. The suitability of the catalysts was analyzed considering activity, stability and carbon yield. Catalysts showed a good performance and similar results according to syngas compositions were obtained.However, some differences related to stability over time and carbon yields were detected. TPR analysis and TEM micrographs of the fresh catalysts revealed the presence of two different Ni particles: large Ni particles with low metal support interaction (MSI) that favoured the formation of encapsulating carbon and small Ni particles inserted in the Al 2 O 3 structure with a greater MSI that lead to NCs formation.Generally both kinds of Ni particles were observed in all catalysts, however their relative abundance was dramatically affected by the Al 2 O 3 employed, the preparation method and the Ni:Al molar ratio.

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mentioning

confidence: 99%

Effect of the synthesis conditions of Ni/Al2O3 catalysts on the biogas decomposition to produce H2-rich gas and carbon nanofibers

Llobet

Pinilla

Moliner

et al. 2015

Applied Catalysis B: Environmental

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“…Unexpectedly, NP-Co showed inert activity, suggesting a possible oxidation of the metal [15] and reduced activity of Co compared to Ni [16]. Interestingly, NP-NiCo showed moderate thermal stability and maintained activity up to 650 °C, whereas NP-Ni was unstable.…”

Section: Resultsmentioning

confidence: 97%

In-Situ TEM Study of a Nanoporous Ni–Co Catalyst Used for the Dry Reforming of Methane

Fujita

Higuchi

Yamamoto

et al. 2017

Metals

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Abstract:We performed in-situ transmission electron microscopy (TEM) on a dealloyed nanoporous NiCo catalyst used for the dry reforming of methane (DRM) to investigate the origin of the catalytic activity and structural durability. The in-situ observations and local chemical analysis indicated that the DRM induced chemical demixing of Ni and Co accompanied by grain refinement, implying possible "synergic effects" in a general bimetallic NiCo catalyst when used for the DRM.

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“…Compared with Ni/SiC, 5Co-Ni/SiC shows a lower reduction temperature at about 328 o C, indicating the addition of Co enhances the reducibility of Ni/SiC catalyst. This may be due to the interaction between Co and Ni species, which decreases the interaction between metal and SiC support [43][44][45]. In addition, a shoulder peak at about 269 o C is detected in the TPR profile of 5Co-Ni/SiC.…”

Section: -23 Xpsmentioning

confidence: 96%

The Influence of a Second Metal on the Ni/SiC Catalyst for the Methanation of Syngas

Song¹,

Yu²,

Wang³

et al. 2014

Korean Chemical Engineering Research

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− The catalytic performance of silicon carbide supported nickel catalysts modified with or without second metal (Co, Cu and Zn) for the methanation of CO has been investigated in a fixed-bed reactor using a feed consisting of 25% CO and 75% H 2 without any diluent gas. It has been found that the introduction of Co species can clearly improve the catalytic activity of Ni/SiC catalyst, whereas the addition of Cu or Zn can result in a significant decrease in the catalytic activity. The characterizations by means of XRD, TEM, XPS, CO-TPD and H 2 -TPR indicate that the addition of Co could decrease the particle size of active metal, increase active sites on the surface of methanation catalyst, improve the chemisorption of CO and enhance the reducibility of methanation catalysts. Additionally, the special interaction between Co species and Ni species is likely favorable for the dissociation of adsorbed CO on the surface of catalyst, and this may also contribute to the high activity of 5Co-Ni/SiC catalyst for CO methanation reaction. For 5Cu-Ni/SiC catalyst and 5Zn-Ni/SiC catalyst, Cu and Zn species could cover partial nickel particles and decrease the chemisorption amount of CO. These could be responsible for the low methanation activity. In addition, a 150h stability test under 2 MPa and 300 o C showed that 5Co-Ni/SiC catalyst was very stable for CO methanation reaction.

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Biogas reforming for hydrogen production over nickel and cobalt bimetallic catalysts

Cited by 255 publications

References 36 publications

Effect of the synthesis conditions of Ni/Al2O3 catalysts on the biogas decomposition to produce H2-rich gas and carbon nanofibers

Effect of the synthesis conditions of Ni/Al2O3 catalysts on the biogas decomposition to produce H2-rich gas and carbon nanofibers

In-Situ TEM Study of a Nanoporous Ni–Co Catalyst Used for the Dry Reforming of Methane

The Influence of a Second Metal on the Ni/SiC Catalyst for the Methanation of Syngas

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