Effect of boron on the stability of Ni catalysts during steam methane reforming

Xu, Jing; Chen, Luwei; Tan, Kong Fei; Borgna, Armando; Saeys, Mark

doi:10.1016/j.jcat.2008.11.007

Cited by 154 publications

(122 citation statements)

References 24 publications

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“…Figure 8. B 1s XPS spectra for calcined and reduced 15 wt% Ni/γ-Al 2 O 3 catalysts with various B contents [58].…”

Section: Ni Metal Particles Modified With Other Metals (Sn Cu Co Mmentioning

confidence: 99%

“…Based on first principle calculations, Saeys and Borgna [58] proposed that a small amount of boron could possibly enhance the stability of Ni catalysts. Since B and C exhibit similar chemisorptions preferences on Ni catalysts, a small amount of B might selectively block the most stable binding sites.…”

Section: Ni Metal Particles Modified With Other Metals (Sn Cu Co Mmentioning

confidence: 99%

“…Interestingly, Borgna and Saeys [58] found that a small amount of boron could enhance the stability without compromising the catalytic activity. Catalytic tests showed that promotion with 1.0 wt% boron reduced the rate of deactivation by a factor of 3 and increased the initial methane conversion from 56% to 61%.…”

Section: Catalytic Activity Of Ni-au Catalysts and Comparison With Otmentioning

confidence: 99%

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Ni-Based Catalysts for Low Temperature Methane Steam Reforming: Recent Results on Ni-Au and Comparison with Other Bi-Metallic Systems

et al. 2013

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Steam reforming of light hydrocarbons provides a promising method for hydrogen production. Ni-based catalysts are so far the best and the most commonly used catalysts for steam reforming because of their acceptably high activity and significantly lower cost in comparison with alternative precious metal-based catalysts. However, nickel catalysts are susceptible to deactivation from the deposition of carbon, even when operating at steam-to-carbon ratios predicted to be thermodynamically outside of the carbon-forming regime. Reactivity and deactivation by carbon formation can be tuned by modifying Ni surfaces with a second metal, such as Au through alloy formation. In the present review, we summarize the very recent progress in the design, synthesis, and characterization of supported bimetallic Ni-based catalysts for steam reforming. The progress in the modification of Ni with noble metals (such as Au and Ag) is discussed in terms of preparation, characterization and pretreatment methods. Moreover, the comparison with the effects of other metals (such as Sn, Cu, Co, Mo, Fe, Gd and B) is addressed. The differences of catalytic activity, thermal stability and carbon species OPEN ACCESSCatalysts 2013, 3 564 between bimetallic and monometallic Ni-based catalysts are also briefly shown.

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“…Figure 8. B 1s XPS spectra for calcined and reduced 15 wt% Ni/γ-Al 2 O 3 catalysts with various B contents [58].…”

Section: Ni Metal Particles Modified With Other Metals (Sn Cu Co Mmentioning

confidence: 99%

Section: Ni Metal Particles Modified With Other Metals (Sn Cu Co Mmentioning

confidence: 99%

Section: Catalytic Activity Of Ni-au Catalysts and Comparison With Otmentioning

confidence: 99%

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Ni-Based Catalysts for Low Temperature Methane Steam Reforming: Recent Results on Ni-Au and Comparison with Other Bi-Metallic Systems

et al. 2013

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“…Figure 5a did not show any typical Ni 2p peak centered around 853 eV assignable to metallic Ni. However, the samples exhibited two Ni 2p peaks at binding energies of 855.7 and 874.1 eV, corresponding to the spin-orbit Ni 2p 3/2 and Ni 2p 1/2 of NiO [23,24], respectively. In addition, it was found that the Ni 2p 3/2 peak was accompanied with a shake-up satellite at approximately 861.9 eV.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 98%

Preparation of Ce-modified Raney Ni Catalysts and Their Application in Aqueous-Phase Reforming of Cellulose

Wen

Wang

et al. 2011

Catal Lett

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A series of Ce-modified Raney Ni (RNi) catalysts were successfully prepared by a simple wet chemical route and employed in aqueous-phase reforming of cellulose. Remarkable enhancement in hydrogen selectivity and yield after the Ce introduction was observed. At 533 K and autogenous pressure, a highest hydrogen yield of 17.8 mmol/g cellulose , which was comparable with that of 5 wt% Pt/AC, could be obtained over Ce-modified catalyst at a Ce:Ni ratio of 0.054. The catalysts were characterized by N 2 adsorption/desorption, XRD, SEM, XPS and H 2 -TPD. It was found that cerium existed at the surface of the catalyst as Ce(OH) 3 , and more defects were generated during Ce modification. Based on the characterization and catalytic performance, it was suggested that the deposited Ce(OH) 3 may transform into reducible CeO 2 under the reaction conditions, thus promoting the desired water-gas shift reaction, leading to more H 2 . On the other hand, the active sites for undesired methanation reaction may be effectively poisoned by Ce modification, thus leading to less undesired methane.

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“…[1][2][3] The commercial steam-reforming processes have used Ni-based catalysts because of their acceptably high activity and significantly lower cost in comparison to the alternative precious metal-based catalysts. However, these nickel-based catalysts are susceptible to deactivation through the deposition of carbon, [4][5][6] under the steam-reforming conditions, where the metal surfaces are covered with various CHx intermediates. Without a fast steam gasification step to convert these intermediates to CO and H 2 , these adsorbed CHx species that are present on the Ni surface can undergo further dehydrogenation, polymerization, and rearrangement into highly stable carbon species that not only have a low reactivity toward the gasification reaction but can also dissolve into or encapsulate the Ni particles.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Ni/3d Series Transition Metal/γ-Al₂O₃Catalysts and their Hydrogen Production Abilities from Butane Steam Reforming

Lee¹,

Choi²,

Ji³

et al. 2011

Bulletin of the Korean Chemical Society

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The materials composed of the 3d series transition metals are introduced into the hydrocarbon steam-reforming reaction in order to enhance the H 2 production and abruptly depress the catalytic deactivation resulting from the strong sintering between the Ni component and the γ-Al 2 O 3 support. The conventional impregnation method is used to synthesize the Ni/3d series metal/γ-Al 2 O 3 materials through the sequentially loading Ni source and the 3d series metal (Ti, V, Cr, Mn, Fe, Co, Cu, and Zn) sources onto the γ-Al 2 O 3 support. The Mnloaded material exhibits a significantly higher reforming reactivity than the conventional Ni/γ-Al 2 O 3 and the other Ni/3d series metal/γ-Al 2 O 3 materials. Particularly the addition of Mn selectively improves the H 2 product selectivity by eliminating the formation of CH 4 and CO. The H 2 production is maximized at a value of 95% over Ni(0.3)/Mn(0.3)/γ-Al 2 O 4 (1.0) with a butane conversion of 100% above 750 o C for up to 55 h.

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Effect of boron on the stability of Ni catalysts during steam methane reforming

Cited by 154 publications

References 24 publications

Ni-Based Catalysts for Low Temperature Methane Steam Reforming: Recent Results on Ni-Au and Comparison with Other Bi-Metallic Systems

Ni-Based Catalysts for Low Temperature Methane Steam Reforming: Recent Results on Ni-Au and Comparison with Other Bi-Metallic Systems

Preparation of Ce-modified Raney Ni Catalysts and Their Application in Aqueous-Phase Reforming of Cellulose

Characteristics of Ni/3d Series Transition Metal/γ-Al₂O₃Catalysts and their Hydrogen Production Abilities from Butane Steam Reforming

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Effect of boron on the stability of Ni catalysts during steam methane reforming

Cited by 154 publications

References 24 publications

Ni-Based Catalysts for Low Temperature Methane Steam Reforming: Recent Results on Ni-Au and Comparison with Other Bi-Metallic Systems

Ni-Based Catalysts for Low Temperature Methane Steam Reforming: Recent Results on Ni-Au and Comparison with Other Bi-Metallic Systems

Preparation of Ce-modified Raney Ni Catalysts and Their Application in Aqueous-Phase Reforming of Cellulose

Characteristics of Ni/3d Series Transition Metal/γ-Al2O3Catalysts and their Hydrogen Production Abilities from Butane Steam Reforming

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Product

Resources

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Characteristics of Ni/3d Series Transition Metal/γ-Al₂O₃Catalysts and their Hydrogen Production Abilities from Butane Steam Reforming