Journal ArticleDOI
The stoichiometry and poisoning by sulfur of hydrogen, oxygen and carbon monoxide chemisorption on unsupported nickel
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In this paper, the authors measured the hydrogen adsorption isotherms of nickel powder at room temperature and at 200 °C and showed that the H/Nis ratio on unsupported nickel is 1:1 at both temperatures.About:
This article is published in Journal of Catalysis.The article was published on 1977-03-01. It has received 69 citations till now. The article focuses on the topics: Adsorption & Nickel.read more
Citations
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Journal ArticleDOI
Mechanisms of catalyst deactivation
TL;DR: The literature treating mechanisms of catalyst deactivation is reviewed in this paper, which can be classified into six distinct types: (i) poisoning, (ii) fouling, (iii) thermal degradation, (iv) vapor compound formation accompanied by transport, (v) vapor solid and/or solid solid reactions, and (vi) attrition/crushing.
Journal ArticleDOI
Heterogeneous Catalyst Deactivation and Regeneration: A Review
TL;DR: In this article, a review on deactivation and regeneration of heterogeneous catalysts classifies deactivation by type (chemical, thermal, and mechanical) and by mechanism (poisoning, fouling, thermal degradation, vapor formation, vapor-solid and solid-solid reactions, and attrition/crushing).
Book ChapterDOI
Hydrogen and Synthesis gas by Steam- and CO2 reforming
TL;DR: In this article, the authors provide a coherent description of the catalysis of the steam reforming reactions, focusing on the role of the catalyst and problems related to carbon formation, and provide a summary of the empirical evidence of the reforming reactions.
Book ChapterDOI
Catalytic Steam Reforming
TL;DR: The steam reforming process converts hydrocarbons into mixtures of hydrogen, carbon monoxide, carbon dioxide, and methane as discussed by the authors, which is used also for the well-knowm process for improvement of the octane number of gasoline.
Journal ArticleDOI
The stoichiometries of H2 and CO adsorptions on cobalt: Effects of support and preparation
TL;DR: In this article, high temperature hydrogen adsorption and conventional 298 K adsorptions of hydrogen and carbon monoxide were characterized by unsupported cobalt and cobalt supported on silica, alumina, titania, magnesia, and carbon.
References
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Journal ArticleDOI
Heterogeneous methanation: Steady-state rate of CO hydrogenation on supported ruthenium, nickel and rhenium
TL;DR: In this article, a study has been made of initial activity, steady-state activity and activity in the presence of H2S for CO hydrogenation on a number of supported catalysts.
Journal ArticleDOI
Infrared studies of carbon monoxide chemisorbed on nickel and on mercury-poisoned nickel surfaces1
J. T. Yates,C. W. Garland +1 more
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Chemisorption of hydrogen sulfide on a supported nickel catalyst
TL;DR: In this article, the authors studied the chemisorption of hydrogen sulfide on some nickel catalysts in the temperature range 550-645 °C and showed that a saturation layer was formed at ratios above 5 × 10−6, approximately, and at ratios at 10−3 bulk sulfide (Ni2S3) was formed.
Journal ArticleDOI
Measurement of the state of metal dispersion on supported nickel catalysts by gas chemisorption
C.S. Brooks,G.L.M. Christopher +1 more
TL;DR: In this article, a combination of hydrogen chemisorption or X-ray diffraction line-broadening measurements, plus carbon monoxide chemisors, was used to estimate the relative amounts of nickel in comparatively large crystallites (∼50 A) and in an essentially atomic state of dispersion, as well as the specific surface area of the nickel in these two size ranges.
Journal ArticleDOI
The chemisorptive bonding of hydrogen on nickel
TL;DR: In this article, it was shown that chemisorbed hydrogen on nickel must consist of an atom carrying a negative charge, and that the nickel atom most affected retains a magnetic moment but loses its ability to participate in ferromagnetic exchange interaction.