Effect of pore structure on Ni catalyst for CO2 reforming of CH4

Sun, Nannan; Wen, Xin; Wang, Feng; Wei, Wei; Sun, Yuhan

doi:10.1039/b925503f

Cited by 118 publications

(87 citation statements)

References 20 publications

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“…[17][18][19][20] Wet impregnation is the most commonly used method for introduction of metal components. However, the metal-support interaction resulted from impregnation is generally too weak to resist sintering in high temperature applications.…”

mentioning

confidence: 99%

Phyllosilicate evolved hierarchical Ni- and Cu–Ni/SiO2 nanocomposites for methane dry reforming catalysis

Zhang

Cai

et al. 2015

Applied Catalysis A: General

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mentioning

confidence: 99%

Phyllosilicate evolved hierarchical Ni- and Cu–Ni/SiO2 nanocomposites for methane dry reforming catalysis

Zhang

Cai

et al. 2015

Applied Catalysis A: General

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“…MgO was used because NiO and MgO can form theoretically ideal solid solution in any molar ratio and the strong interaction between them is helpful for preventing Ni particle sintering and the coke deposition [14,15]. Mesoporous MgO instead of commercial MgO was used because the higher specific surface area induced by mesopores favored the dispersion of Ni metal particles and the "confinement effect" of mesopores limited the growth of Ni particles during catalyst preparation and subsequent reaction [16,17]. In addition, mesopores improved the mass transfer of the reactants and products.…”

Section: Introductionmentioning

confidence: 99%

Significantly Improved Catalytic Performance of Ni-Based MgO Catalyst in Steam Reforming of Phenol by Inducing Mesostructure

Yang

Wang

2015

Catalysts

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Abstract:A Ni/meso-MgO catalyst with high surface area and small Ni nanoparticles was synthesized and investigated for hydrogen production by steam reforming of phenol for the first time. Compared to conventional Ni/MgO, the Ni/meso-MgO catalyst showed higher catalytic activity and stability. X-ray Diffraction, N2 adsorption, hydrogen temperature programmed reduction, transmission electron microscopy and thermal gravimetry results indicated that the Ni/meso-MgO catalyst had higher surface area than Ni/MgO and Ni particles of Ni/meso-MgO were narrowly distributed in the range of 5~6 nm with an average size of 5.3 nm, while Ni particles of Ni/MgO were in the range of 6~10 nm with an average size of 7.92 nm. The small and uniform Ni nanoparticles in Ni/meso-MgO were attributed to the high surface area and the confinement effect of the mesoporous structure of meso-MgO, which could effectively limit the growth of the active metal and stabilize Ni particles during the procedure of NiO reduction. The mesoporous structure of Ni/meso-MgO also played an important role in suppressing Ni nanoparticle sintering and carbon deposition during the steam reforming of phenol reaction.

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“…[8b, 9] However, maintaining a high dispersion of metallic particles over the support is a challenging task because Ni particles agglomerate easily under severe conditions of the reforming reaction. [10] Because the ordered mesoporous silica material was synthesized by applying the nanostructure self-assembly technique by Mobil scientists in 1992, [11] a great attention has been drawn to this research field owing to the potential application of these mesoporous materials in catalysis, adsorption, and drug delivery. [4a, 12] The ordered mesoporous materials have high specific surface areas, tunable pore sizes, and narrow pore size distribution.…”

Section: Introductionmentioning

confidence: 99%

One‐pot Synthesis of Ordered Mesoporous NiCeAl Oxide Catalysts and a Study of Their Performance in Methane Dry Reforming

Wang

Deng

et al. 2014

ChemCatChem

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Ordered mesoporous NiAl and NiCeAl catalysts with different Ce/Al molar ratios were facilely synthesized by using the improved evaporation‐induced self‐assembly method. The characterization results confirmed that the ordered mesoporous structure was well sustained in the Ce‐incorporated NiAl materials (Ce/Al molar ratio<4 %). Compared with NiAl mesoporous materials, Ce‐incorporated mesoporous materials demonstrated higher specific surface areas, larger pore volumes, and more uniform pore sizes. The catalytic test conducted by using methane dry reforming revealed that compared with NiAl catalysts, all the Ce‐promoted catalysts demonstrated improved initial catalytic activity, which was due to the high dispersion and the high reduction degree of active Ni species in NiCeAl catalysts. The stable alumina framework, confinement effect of ordered mesopores, and high oxygen mobility contributed to the improved catalytic stability of NiCeAl catalysts. For comparison, the mesoporous NiCeAl catalyst (denoted as NiCeAl‐IMP) was also prepared by using the conventional impregnation method. The agglomeration of Ni particles was observed during the stability test for the Ni‐impregnated catalyst, which accelerated the rate of carbon deposition. The NiCeAl catalyst (Ce/Al molar ratio=1 %) demonstrated excellent resistance to the formation of graphitic carbon species owing to the redox property, while a large amount of graphitic carbon species was deposited over the NiAl sample, which was responsible for deactivation.

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Effect of pore structure on Ni catalyst for CO2 reforming of CH4

Cited by 118 publications

References 20 publications

Phyllosilicate evolved hierarchical Ni- and Cu–Ni/SiO2 nanocomposites for methane dry reforming catalysis

Phyllosilicate evolved hierarchical Ni- and Cu–Ni/SiO2 nanocomposites for methane dry reforming catalysis

Significantly Improved Catalytic Performance of Ni-Based MgO Catalyst in Steam Reforming of Phenol by Inducing Mesostructure

One‐pot Synthesis of Ordered Mesoporous NiCeAl Oxide Catalysts and a Study of Their Performance in Methane Dry Reforming

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