Application of NiO-Al2O3 aerogels to the CO2-reforming of CH4

Osaki, Toshihiko; Tanaka, Toŝhiyuki; Horiuchi, Tatsuro; Sugiyama, Toyohiko; Suzuki, Kenzi; Mori, Toshiaki

doi:10.1002/1099-0739(200012)14:12<789::aid-aoc79>3.0.co;2-s

Cited by 15 publications

(4 citation statements)

References 5 publications

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“…No reduction of separate Ni oxide or Co oxide was observed. This agrees with the XRD result which did not involve Ni and Co oxide phases as well 20.…”

Section: Resultssupporting

confidence: 91%

“…All samples have overlapped peaks consisting of MgO (JCPDS 77‐2179), NiO‐MgO solid solution, and CoO‐MgO solid solution phases 17, 18 at around 2 θ = 37°, 43°, 62.3°, and 78.6°. Notably, specific peaks of Co 3 O 4 were not found in the XRD patterns, indicating that the active metal species were highly dispersed 19, 20. The XRD analysis proved that all catalysts were well‐crystallized 21.…”

Section: Resultsmentioning

confidence: 95%

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Coprecipitated Ni‐Co Bimetallic Nanocatalysts for Methane Dry Reforming

2014

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Methane dry reforming was studied over nanostructure bimetallic Ni‐Co‐MgO catalysts. The catalysts were prepared by coprecipitation with different Ni‐Co contents and characterized by XRD, BET, N2 adsorption/desorption, temperature‐programmed reduction (TPR), SEM, and temperature‐programmed oxidation (TPO) techniques. XRD results let conclude that all samples contained MgO crystallite phases. With a higher Ni content the intensity of the diffraction peaks became stronger, indicating growth of the crystallite size of the prepared solid solutions. BET analysis demonstrated that a higher Ni‐Co content decreased the surface area. The optimal catalyst could be determined which had the highest activity and a good stability in dry reforming reaction.

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“…No reduction of separate Ni oxide or Co oxide was observed. This agrees with the XRD result which did not involve Ni and Co oxide phases as well 20.…”

Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 95%

Coprecipitated Ni‐Co Bimetallic Nanocatalysts for Methane Dry Reforming

2014

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“…The combustionsynthesis has been well explored for preparing Ni-based nanocatalysts, however, the great concerns on safety and environment are raised [10]. Ni-based aerogel catalysts prepared by supercritical drying (SCD) of the catalysts precursor hydrogel represent a simple and cost-effective technique to synthesise the finite Ni-based catalysts with high surface area and excellent performance in dry reforming [11]. However, the aerosol itself could not fully overcome the issue of deactivation due to coking in the fixed bed reformer [12].…”

Section: Introductionmentioning

confidence: 99%

Comparative study of the dry reforming of methane on fluidised aerogel and xerogel Ni/Al2O3 catalysts

2013

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The xerogel and aerogel Ni(20 wt %)/Al 2 O 3 catalysts were prepared through incipient-wetnessimpregnation and co-precipitation-supercritical drying (CP-SCD), respectively. All the fresh and used catalysts were well characterised using FESEM, BET, XRD, H 2 -TPR and H 2 -TPD techniques. Their properties and catalytic performance in dry reforming of CH 4 in a fluidised bed reactor were comparatively investigated. In comparison with the xerogel catalyst, the aerogel catalyst possessed smaller crystallite size of nickel, larger specific surface area, higher nickel dispersion, lower bulky density and better fluidization quality. More importantly, the aerosol catalyst showed higher catalytic activity, stability and less carbon deposition in dry reforming, due to the excellent physicochemical properties of the aerogel catalyst and its enhanced fluidization quality.

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“…Therefore, various methods were employed to improve Ni/Al 2 O 3 . Firstly, smaller Ni particles over Al 2 O 3 were prepared to inhibit carbon deposition, because carbon deposition occurs more easily on larger nickel particles than smaller ones . For example, Shang applied atomic layer deposition (ALD) to synthesize Ni/Al 2 O 3 with high dispersion of Ni, resulting in the stable conversion of 93% at 850°C.…”

Section: Dry Reforming Of Methanementioning

confidence: 99%

Advances in catalytic conversion of methane and carbon dioxide to highly valuable products

Cai

2019

Energy Science & Engineering

125

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Two typical processes have been developed for the conversion of methane and carbon dioxide to higher valuable products: dry reforming of methane (DRM) and CO2‐oxidative coupling of methane (CO2‐OCM). Numerous articles reviewed progresses in either DRM or CO2‐OCM, but no one covers both processes. In this review article, we systematically evaluated progresses in both DRM and CO2‐OCM processes for conversion of methane and CO2 to highly valuable products. Critical issues, which are carbon deposition and high energy cost for DRM and the contradiction between large activity and high selectivity for CO2‐OCM, were emphasized. Strategies to develop effective catalysts were evaluated, including the enhancement of metal‐support interactions, the introduction of promotors, the formation of solid solutions, and the construction of core‐shell structures. Plasma and photocatalysis were discussed as new promising technologies for DRM and CO2‐OCM.

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Application of NiO-Al2O3 aerogels to the CO2-reforming of CH4

Cited by 15 publications

References 5 publications

Coprecipitated Ni‐Co Bimetallic Nanocatalysts for Methane Dry Reforming

Coprecipitated Ni‐Co Bimetallic Nanocatalysts for Methane Dry Reforming

Comparative study of the dry reforming of methane on fluidised aerogel and xerogel Ni/Al2O3 catalysts

Advances in catalytic conversion of methane and carbon dioxide to highly valuable products

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