In situ controllable assembly of layered-double-hydroxide-based nickel nanocatalysts for carbon dioxide reforming of methane

Xu, Zhenxin; Wang, Ning; Chu, Wei; Deng, Jie; Luo, Shi-Zhong

doi:10.1039/c4cy01302f

Cited by 61 publications

(34 citation statements)

References 48 publications

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“…Structural properties of the catalysts were obtained by N 2 adsorption‐desorption analysis . The BET surface area, pore volume, and average pore diameter of as prepared catalysts are shown in Table .…”

Section: Resultsmentioning

confidence: 99%

“…In sharp contrast to SiC supported catalysts, the diffraction peaks of nickel are weak, which may be resulted from the lower reduction degree. The diffraction peaks at 35.5°, 41.3°, 59.9°, 65.5°, and 71.7° are assigned to distinct peaks of face‐centered cubic 3C‐SiC (β‐SiC), and the peaks at 44.5° 51.8° and 76.4° are indexed to the face‐centered cubic nickel, which are related to the (111), (200) and (220) planes of nickel, respectively . The mean sizes of the nickel crystallites are shown in Table , as estimated from Ni(111) planes reflection using the Scherrer equation.…”

Section: Resultsmentioning

confidence: 99%

“…However, although the process of impregnation is a simple method that is commonly used, the subsequent chemical properties and catalytic performances might be diverse depending on every single step during the synthesis. As reported in previous studies, the nature of nickel precursors used in the catalyst preparation process is a crucial parameter affecting catalytic performance . It has been found that the type of nickel species led to distinctive interactions with carriers and thus different reduction behaviors .…”

Section: Introductionmentioning

confidence: 90%

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Impacts of SiC Carrier and Nickel Precursor of NiLa/support Catalysts for CO₂ Selective Hydrogenation to Synthetic Natural Gas (SNG)

Zheng

Liu

et al. 2017

ChemistrySelect

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The porous silicon carbide (β‐SiC) carrier supported nickel‐lanthanum based catalysts (NiLa/SiC) were synthesized via incipient‐wetness impregnation by using two types of nickel salts as the precursor, for the selective hydrogenation of carbon dioxide (CO2+4H2→CH4+2H2O). The alumina supported catalysts were also prepared and tested for comparison. The samples were characterized using TEM, TPR, XRD, SEM, TG‐DTG techniques. Compared to the Al2O3 supported catalysts, the SiC supported catalysts were more resistant to sintering and carbon deposition due to the high thermal conductivity of SiC support. The relative weak metal‐support interaction on Ni nanoparticles supported on SiC carrier resulted in the easy reduction of active species during the activation process. Meanwhile, the performances of the catalysts prepared from nickel acetate were better than those of using nickel nitrate, while enhanced nickel dispersion and better reducibility of the catalyst from nickel acetate werr evidenced by TEM, TPR and XRD results. Catalytic performances exhibited that Ni−Ac‐La/SiC catalyst possessed the higher activity with 89.4 % conversion of CO2 and almost 100 % selectivity to methane with slight deactivation after 3000 min test under reaction conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 90%

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Impacts of SiC Carrier and Nickel Precursor of NiLa/support Catalysts for CO₂ Selective Hydrogenation to Synthetic Natural Gas (SNG)

Zheng

Liu

et al. 2017

ChemistrySelect

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“…The desorption peaks for the moderate and weak are allied to the adsorption of CO 2 by Lewis acid‐base pairings and surface hydroxide radical respectively. Decomposition of unidentate carbonates gives the high temperature peak . The introduction of promoters affected the type of basic sites and the peak intensities.…”

Section: Resultsmentioning

confidence: 99%

Influence of promoted 5%Ni/MCM-41 catalysts on hydrogen yield in CO₂reforming of CH₄

et al. 2018

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Summary The modern world needs to find an alternative fuel that can replace the nonrenewable fossil fuels. Being versatile, sustainable, efficient, and clean energy carrier, hydrogen has the potential to play that role. Contrasted to conventional hydrocarbon fuels, hydrogen has high energy yield per unit mass. CO2 reforming of CH4 is a progressing technology for hydrogen production. Ni promoted with Ga, Gd, Sc, Ce, or Cs supported on mesoporous silica MCM‐41 catalysts were synthesized via an impregnation technique. To the best of our knowledge, the use of such promoters with Ni supported on MCMC‐41 has not been yet explored in the literature. H2‐TPR, XRD, TGA, and TEM were used to characterize and explain the catalytic performance of 5%Ni + 1%x/MCM‐41 (x = Ga, Gd, Sc, Ce, or Cs) catalysts for the production of synthesis gas. The prepared catalysts preserved the ordered mesoporous structures of MCM‐41. Promoters increased the metal‐support interactions; moreover, Gd, Sc, Cs, or Ce‐promoted catalysts yielded the lowest amounts of carbon deposition. Promoting with 1% of Ga, Gd, or Ce improved CH4 and CO2 conversions by 38%. On the other hand, 1% Sc or Cs reduced CH4 conversion by 18% and 93% respectively, and CO2 conversions by 16% and 92% respectively. The results showed that the maximum H2 yield followed the order 1% Ga (90%) > 1% Ce (84%) > 1% Gd (74%).

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“…By this in-situ co-precipitation method, highly homogeneous dispersed and small particles of the active component and of large specific surface area provided by γ-Al 2 O 3 were achieved for these Ni/Co catalysts. Xu et al [25] reported an in situ controllable assembly procedure of Ni-based nanocatalysts derived from HTLcs. In this procedure, the mesoporous γ-Al 2 O 3 was activated in a solution of metal nitrates by urea hydrolysis under hydrothermal conditions.…”

Section: Co-precipitationmentioning

confidence: 99%

Development of Ni-Based Catalysts Derived from Hydrotalcite-Like Compounds Precursors for Synthesis Gas Production via Methane or Ethanol Reforming

Cheng

et al. 2017

Catalysts

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As a favorably clean fuel, syngas (synthesis gas) production has been the focus of concern in past decades. Substantial literatures reported the syngas production by various catalytic reforming reactions particularly in methane or ethanol reforming. Among the developed catalysts in these reforming processes, Ni-based catalysts from hydrotalcite-like compounds (HTLcs) precursors have drawn considerable attention for their preferable structural traits. This review covers the recent literature reporting syngas production with Ni-based catalysts from HTLc precursors via methane or ethanol reforming. The discussion was initiated with catalyst preparation (including conventional and novel means), followed by subsequent thermal treatment processes, then composition design and the addition of promoters in these catalysts. As Ni-based catalysts have thermodynamic potential to deactivate because of carbon deposition or metal sintering, measures for dealing with these problems were finally summarized. To obtain optimal catalytic performances and resultantly better syngas production, based on analyzing the achievements of the references, some perspectives were finally proposed.

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In situ controllable assembly of layered-double-hydroxide-based nickel nanocatalysts for carbon dioxide reforming of methane

Abstract: The dual confinement effects from alumina and LDH precursors produced a new nanoplates-on-pore structure with a uniform distribution and smaller size of Ni nanoparticles (NPs) for the LDOs/γ-Al2O3, while enhanced catalytic performance and better resistance to sintering and coking.

Cited by 61 publications

References 48 publications

Impacts of SiC Carrier and Nickel Precursor of NiLa/support Catalysts for CO₂ Selective Hydrogenation to Synthetic Natural Gas (SNG)

Impacts of SiC Carrier and Nickel Precursor of NiLa/support Catalysts for CO₂ Selective Hydrogenation to Synthetic Natural Gas (SNG)

Influence of promoted 5%Ni/MCM-41 catalysts on hydrogen yield in CO₂reforming of CH₄

Development of Ni-Based Catalysts Derived from Hydrotalcite-Like Compounds Precursors for Synthesis Gas Production via Methane or Ethanol Reforming

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In situ controllable assembly of layered-double-hydroxide-based nickel nanocatalysts for carbon dioxide reforming of methane

Abstract: The dual confinement effects from alumina and LDH precursors produced a new nanoplates-on-pore structure with a uniform distribution and smaller size of Ni nanoparticles (NPs) for the LDOs/γ-Al2O3, while enhanced catalytic performance and better resistance to sintering and coking.

Cited by 61 publications

References 48 publications

Impacts of SiC Carrier and Nickel Precursor of NiLa/support Catalysts for CO2 Selective Hydrogenation to Synthetic Natural Gas (SNG)

Impacts of SiC Carrier and Nickel Precursor of NiLa/support Catalysts for CO2 Selective Hydrogenation to Synthetic Natural Gas (SNG)

Influence of promoted 5%Ni/MCM-41 catalysts on hydrogen yield in CO2reforming of CH4

Development of Ni-Based Catalysts Derived from Hydrotalcite-Like Compounds Precursors for Synthesis Gas Production via Methane or Ethanol Reforming

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Product

Resources

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Impacts of SiC Carrier and Nickel Precursor of NiLa/support Catalysts for CO₂ Selective Hydrogenation to Synthetic Natural Gas (SNG)

Impacts of SiC Carrier and Nickel Precursor of NiLa/support Catalysts for CO₂ Selective Hydrogenation to Synthetic Natural Gas (SNG)

Influence of promoted 5%Ni/MCM-41 catalysts on hydrogen yield in CO₂reforming of CH₄