Addition of zirconia in Ni/SiO2 catalyst for improvement of steam resistance

Takahashi, Ryōji; Sato, Satoshi; Sodesawa, Toshiaki; Yoshida, Masanori; Tomiyama, Satoshi

doi:10.1016/j.apcata.2004.06.033

Cited by 58 publications

(18 citation statements)

References 34 publications

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“…Indeed, the core-shell catalysts display comparable conversions to the fresh catalysts. A further deactivation of Ni/SiO 2 -Sil-1 in the absence of alkali poison could be attributed to catalyst sintering [39,47]. The reaction results of Ni/SiO 2 -Sil-1 and Ni/Al 2 O 3 -Sil-1 core-shell catalysts are consistent with the report by Roh et al [48] that alumina is a good catalyst support for nickel in steam reforming reaction.…”

Section: Alkali-resistance Of Core-shell Catalysts For Methane Steam supporting

confidence: 81%

Preparation of core (Ni base)–shell (Silicalite-1) catalysts and their application for alkali resistance in direct internal reforming molten carbonate fuel cell

Zhang

et al. 2012

Journal of Power Sources

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Section: Alkali-resistance Of Core-shell Catalysts For Methane Steam supporting

confidence: 81%

Preparation of core (Ni base)–shell (Silicalite-1) catalysts and their application for alkali resistance in direct internal reforming molten carbonate fuel cell

Zhang

et al. 2012

Journal of Power Sources

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“…Similar XRD patterns for Ni/SiO2 catalyst calcined in air have been reported in other work. 32,33 The…”

Section: Xrd Analysismentioning

confidence: 99%

Investigation of Ni/SiO2 catalysts prepared at different conditions for hydrogen production from ethanol steam reforming

Dupont

Nahil

et al. 2017

Journal of the Energy Institute

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Ni/SiO2 catalysts prepared by a sol-gel method have been investigated for hydrogen production via steam reforming of ethanol using a continuous flow, fixed bed reactor system. Chemical equilibrium calculations were also performed to determine the effects of temperature and molar steam to carbon ratio on hydrogen production. The acidity of the preparation solution (modified by nitric acid and ammonia) and calcination atmosphere (air and N2) were investigated in the preparation of the catalysts. BET surface area and porosity, temperature-programmed oxidation (TPO), X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were used to characterise the prepared catalysts. The BET surface area was reduced when the solution acidity was lowered during the sol-gel preparation process. A pH value less than 2.0 was necessary to achieve high metal dispersion in the catalyst. Smaller NiO particles were obtained when the catalyst was calcined in N2. Material balances on ethanol steam reforming at 600 C using the prepared Ni/SiO2 catalysts were determined, and higher hydrogen production with lower coke deposition on the reacted catalysts were also obtained from the catalysts calcined in N2 atmosphere.

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“…To increase the textural properties, silica has been incorporated to ZrO 2 -CeO 2 [25,26], and the literature also reports how CeO 2 or ZrO 2 -CeO 2 were supported on silica to be used in catalytic applications [27,28]. Other researchers describe the addition of ZrO 2 to ceria and silica to increase their thermal resistance and prevent the growth of Ni crystallites [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ce and Zr Addition to Ni/SiO2 Catalysts for Hydrogen Production through Ethanol Steam Reforming

et al. 2015

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A series of Ni/Ce x Zr 1−x O 2 /SiO 2 catalysts with different Zr/Ce mass ratios were prepared by incipient wetness impregnation. Ni/SiO 2 , Ni/CeO 2 and Ni/ZrO 2 were also prepared as reference materials to compare. Catalysts' performances were tested in ethanol steam reforming for hydrogen production and characterized by XRD, H 2 -temperature programmed reduction (TPR), NH 3 -temperature programmed desorption (TPD), TEM, ICP-AES and N 2 -sorption measurements. The Ni/SiO 2 catalyst led to a higher hydrogen selectivity than Ni/CeO 2 and Ni/ZrO 2 , but it could not maintain complete ethanol conversion due to deactivation. The incorporation of Ce or Zr prior to Ni on the silica support resulted in catalysts with better performance for steam reforming, keeping complete ethanol conversion over time. When both Zr and Ce were incorporated into the catalyst, Ce x Zr 1−x O 2 solid solution was formed, as confirmed by XRD analyses. TPR results revealed stronger Ni-support interaction in the Ce x Zr 1−x O 2 -modified catalysts than in Ni/SiO 2 one, which can be attributed to an increase of the dispersion of Ni species. All of the Ni/Ce x Zr 1−x O 2 /SiO 2 catalysts exhibited good catalytic activity and stability after 8 h of time on stream at 600• C . The best catalytic performance in terms of hydrogen selectivity was achieved when the Zr/Ce mass ratio was three.

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Addition of zirconia in Ni/SiO2 catalyst for improvement of steam resistance

Cited by 58 publications

References 34 publications

Preparation of core (Ni base)–shell (Silicalite-1) catalysts and their application for alkali resistance in direct internal reforming molten carbonate fuel cell

Preparation of core (Ni base)–shell (Silicalite-1) catalysts and their application for alkali resistance in direct internal reforming molten carbonate fuel cell

Investigation of Ni/SiO2 catalysts prepared at different conditions for hydrogen production from ethanol steam reforming

Effect of Ce and Zr Addition to Ni/SiO2 Catalysts for Hydrogen Production through Ethanol Steam Reforming

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