Two promoting effects of gadolinium on Ni/SiO sub 2 catalysis for CO hydrogenation

Journal Article · Tue Sep 01 00:00:00 EDT 1992 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(92)90156-C· OSTI ID:7152286

Shido, Takafumi; Iwasawa, Yasuhiro ^[1]

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1. Univ. of Tokyo, Hongo, Tokyo (Japan)

Promoting effects of Gd and CO-H interaction in CO hydrogenation on Ni/Gd/SiO{sub 2} catalysts have been investigated by means of kinetics, TPR, and FT-IR. The reaction rate of CO hydrogenation on Ni/Gd/SiO{sub 2} was about five times faster than that on Ni/SiO{sub 2} above 500 K. The IR band of side-on CO (Ni-CO{double bond}O-Gd) on Ni/Gd/SiO{sub 2} was observed at 1,600 cm{sup {minus}1} in addition to the bands of on-top (ca. 2,040 cm{sup {minus}1}) and bridge CO (ca. 1,950 cm{sup {minus}1}). All side-on CO easily dissociates, whereas most on-top Gd exists as partially reduced GdO{sub x} and the GdO{sub x} acts as a reservoir of hydrogen. A new peak due to Gd-H was observed at 1,610 cm{sup {minus}1} under reaction conditions. The adsorbed hydrogen increased the amount of CO adsorbed on Ni/Gd/SiO{sub 2}. Consequently, the easy dissociation of CO and the storage of hydrogen on the Ni/Gd/SiO{sub 2} catalyst promoted the hydrogenation of CO to hydrocarbons (mainly methane).

• OSTI ID: 7152286
• Journal Information: Journal of Catalysis; (United States), Vol. 137:1; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
10 SYNTHETIC FUELS
CARBON MONOXIDE
METHANATION
GADOLINIUM
CATALYTIC EFFECTS
NICKEL
ABSORPTION SPECTROSCOPY
CATALYST SUPPORTS
CATALYSTS
CHEMICAL REACTION KINETICS
COMPARATIVE EVALUATIONS
DISSOCIATION
FOURIER TRANSFORMATION
GADOLINIUM OXIDES
HYDROGEN
HYDROGENATION
INFRARED RADIATION
METHANE
PROMOTERS
REDUCTION
SILICON OXIDES
SYNTHESIS
TEMPERATURE CONTROL
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
ELECTROMAGNETIC RADIATION
ELEMENTS
EVALUATION
GADOLINIUM COMPOUNDS
HYDROCARBONS
INTEGRAL TRANSFORMATIONS
KINETICS
METALS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
RARE EARTH COMPOUNDS
RARE EARTHS
REACTION KINETICS
SILICON COMPOUNDS
SPECTROSCOPY
TRANSFORMATIONS
TRANSITION ELEMENTS
010408* - Coal
Lignite
& Peat- C1 Processes- (1987-)
100200 - Synthetic Fuels- Production- (1990-)