Effect of the Y2O3–ZrO2 support composition on nickel catalyst evaluated in dry reforming of methane

Bellido, Jorge David Alguiar; Assaf, Elisabete Moreira

doi:10.1016/j.apcata.2008.10.002

Cited by 129 publications

(63 citation statements)

References 42 publications

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“…With increasing Y/Zr molar ratio, surface area of Y 2 O 3 -ZrO 2 -X (X = 0, 0.1, 0.2, and 0.3) supports increased in the order of Y 2 O 3 -ZrO 2 -0 (82 m 2 /g) \ Y 2 O 3 -ZrO 2 -0.1 (121 m 2 /g) \ Y 2 O 3 -ZrO 2 -0.2 (140 m 2 /g) \ Y 2 O 3 -ZrO 2 -0.3 (158 m 2 /g). This result was well consistent with the previous work[47] reporting that the addition Product selectivities over Ni/ZrO 2 and Ni/M-ZrO 2 (M = Y 2 O 3 , La 2 O 3 , CaO, and MgO) catalysts after a 40-h reaction of yttrium into zirconia led to an increase in surface area of zirconia due to the enhancement of structural stability of tetragonal phase of zirconia.…”

supporting

confidence: 93%

Support Modification of Supported Nickel Catalysts for Hydrogen Production by Auto-thermal Reforming of Ethanol

et al. 2010

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Recent progress on support modification of supported nickel catalysts for hydrogen production by autothermal reforming of ethanol was reported in this review. Nickel catalysts supported on various materials, including metal oxides and metal oxide-stabilized mesoporous zirconias, were prepared by an incipient wetness impregnation method for use in hydrogen production by auto-thermal reforming of ethanol. Various experimental measurements such as NH 3 -TPD (temperature-programmed desorption) and TPR (temperature-programmed reduction) were carried out to elucidate the different catalytic performance of supported nickel catalysts. It was revealed that acid property of supporting materials served as one of the important factors determining the catalytic performance. Hydrogen yield over nickel catalysts supported on metal oxides showed a volcano-shaped curve with respect to acidity of the supports. Among the catalysts tested, Ni/ZrO 2 catalyst with an intermediate acidity exhibited a superior catalytic performance. It was also observed that reducibility of nickel catalysts supported on metal oxide-stabilized mesoporous zirconias played a key role in determining the catalytic performance in the auto-thermal reforming of ethanol for hydrogen production. Hydrogen yield over nickel catalysts supported on metal oxide-stabilized zirconias increased with increasing reducibility of the catalysts (with decreasing TPR peak temperature of the catalysts).

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supporting

confidence: 93%

Support Modification of Supported Nickel Catalysts for Hydrogen Production by Auto-thermal Reforming of Ethanol

et al. 2010

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“…A very small peak is observed at ~500 °C , in both cases. A small peak at ~630 °C has been reported by other authors for Y 2 O 3 prepared from yttrium nitrate [67].…”

Section: Tprmentioning

confidence: 81%

Gold supported on metal oxides for carbon monoxide oxidation

Carabineiro

Bogdanchikova²,

Avalos-Borja³

et al. 2010

Nano Res.

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Au has been loaded (1% wt.) on different commercial oxide supports (CuO, La 2 O 3 , Y 2 O 3 , NiO) by three different methods: double impregnation (DIM), liquid-phase reductive deposition (LPRD), and ultrasonication (US). Samples were characterised by N 2 adsorption at -196 °C , high-resolution transmission electron microscopy, selected area electron diffraction, energy dispersive X-ray spectrometry, high-angle annular dark-field imaging (Z-contrast), X-ray diffraction, and temperature programmed reduction. CO oxidation was used as a test reaction to compare the catalytic activities. The best results were obtained with Au loaded by DIM on the NiO support, with an activity of 7.2 × 10 -4 mol CO· g Au -1 · s -1 at room temperature. This is most likely related to the Au nanoparticle size being the smallest in this catalyst (average 4.8 nm), since it is well known that gold particle size determines the catalytic activity. Other samples, having larger Au particle sizes (in the 2-12 nm range, with average sizes ranging from 4.8 to 6.8 nm), showed lower activities. Nevertheless, all samples prepared by DIM had activities (from 1.1 × 10 -4 to 7.2 × 10 -4 mol CO· g Au -1 · s -1 , at room temperature) above those reported in the literature for gold on similar oxide supports. Therefore, this method gives better results than the most usual methods of deposition-precipitation or co-precipitation.

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“…Two reduction peaks at about 450 and 650 • C, denominated α and β, respectively, are observed on both catalysts. The first peak (α) corresponds to the reduction of the NiO species of weak and strong interaction with Y and/or Zr [23,27]. This first peak shifts to low temperature on NiO-ZrO m -YO n catalyst, as compared to the NiO-ZrO m catalyst.…”

Section: The Reducibility Of Y-doped and Y-free Nio-zro M Catalystsmentioning

confidence: 98%

Highly Carbon-Resistant Y Doped NiO–ZrOm Catalysts for Dry Reforming of Methane

Wang

et al. 2019

Catalysts

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Yttrium-doped NiO-ZrO m catalyst was found to be novel for carbon resistance in the CO 2 reforming of methane. Yttrium-free and -doped NiO-ZrO m catalysts were prepared by a one-step urea hydrolysis method and characterized by Brunauer-Emmett-Teller (BET), TPR-H 2 , CO 2 -TPD, XRD, TEM and XPS. Yttrium-doped NiO-ZrO m catalyst resulted in higher interaction between Ni and ZrO m , higher distribution of weak and medium basic sites, and smaller Ni crystallite size, as compared to the Y-free NiO-ZrO m catalyst after reaction. The DRM catalytic tests were conducted at 700 • C for 8 h, leading to a significant decrease of activity and selectivity for the yttrium-doped NiO-ZrO m catalyst. The carbon deposition after the DRM reaction on yttrium-doped NiO-ZrO m catalyst was lower than on yttrium-free NiO-ZrO m catalyst, which indicated that yttrium could promote the inhibition of carbon deposition during the DRM process.

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Effect of the Y2O3–ZrO2 support composition on nickel catalyst evaluated in dry reforming of methane

Cited by 129 publications

References 42 publications

Support Modification of Supported Nickel Catalysts for Hydrogen Production by Auto-thermal Reforming of Ethanol

Support Modification of Supported Nickel Catalysts for Hydrogen Production by Auto-thermal Reforming of Ethanol

Gold supported on metal oxides for carbon monoxide oxidation

Highly Carbon-Resistant Y Doped NiO–ZrOm Catalysts for Dry Reforming of Methane

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