Measurement of carbide buildup and removal kinetics on Ni(100)

Goodwan, D.W.; Kelley, R. D.; Madey, Theodore E.; White, J. M.

doi:10.1016/0021-9517(80)90519-9

Cited by 182 publications

(33 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For nickel catalyst, methane formation rate increases rapidly as the H 2 /CO ratio increases from 0.25 to 4, but shows little change at higher H 2 /CO ratios. Such a variation for nickel catalyst is reported for the methane formation rate on the (100) surface of nickel single crystal at 1.3 × 10 −2 bar and 600 K (Goodman et al 1980). Goodman et al (1980) not only measured the methane formation rate but also observed the coverage of the surface carbon using Anger Electron Spectroscopy (AES).…”

Section: Methane Formation Ratementioning

confidence: 80%

“…a) Reaction conditions for Fischer-Tropsch catalysis in the solar nebula, a circumplanetary subnebula, cometary impact vapor clouds, and the atmospheric re-entry of vapor condensate due to asteroidal impacts on early Earth. b) The range of pressure and H 2 /CO ratio of the previous experimental studies (broken lines) (Krebs et al 1979;Goodman et al 1980;Sekine et al 2005) and that of this study for iron and nickel catalysts (solid lines). et al (2005) obtained the methane formation rate for iron catalyst at H 2 /CO = 1000 and P = 2.0 × 10 −2 -5.3 × 10 −1 bars.…”

Section: Conditionsmentioning

confidence: 84%

“…The particle sizes of these catalysts are not exactly the same. However, according to Goodman et al (1980), the size and shape of the catalyst do not affect the methane formation rate in Fischer-Tropsch catalysis significantly. We also use two types of iron-nickel alloy catalysts; Fe:Ni = 40:60 (mol%) and Fe:Ni = 90:10 (mol%).…”

Section: Catalystsmentioning

confidence: 94%

“…Figure 1b shows the range of pressure and H 2 /CO ratio, for which the methane formation rate has been experimentally obtained for iron and nickel catalysts in the previous studies. In industrial chemistry, methane formation rates have been investigated experimentally at pressures higher than 1 bar and at H 2 /CO = 4-100 for iron catalyst (Krebs et al 1979) and at pressures higher than 1.3 × 10 −3 bar and at H 2 /CO = 4 for nickel catalyst (Goodman et al 1980). More recently, Sekine Fig.…”

Section: Conditionsmentioning

confidence: 99%

“…However, today's available quantitative data of Fischer-Tropsch catalysis have been obtained mainly in industrial chemistry (e.g., Vannice 1975;Krebs et al 1979;Goodman et al 1980). Since the productivities of the hydrocarbons are not very good at lower pressures, the laboratory data under conditions relevant to planetary processes have not been reported in industrial chemistry.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

An experimental study on Fischer-Tropsch catalysis: Implications for impact phenomena and nebular chemistry

Sekine

Sugita

Shido

et al. 2006

Meteoritics &Amp; Planetary Science

View full text Add to dashboard Cite

Abstract-Fischer-Tropsch catalysis, by which CO and H 2 are converted to CH 4 on the surface of transition metals, has been considered to be one of the most important chemical reactions in many planetary processes, such as the formation of the solar and circumplanetary nebulae, the expansion of vapor clouds induced by cometary impacts, and the atmospheric re-entry of vapor condensate due to asteroidal impacts. However, few quantitative experimental studies have been conducted for the catalytic reaction under conditions relevant to these planetary processes. In this study, we conduct Fischer-Tropsch catalytic experiments at low pressures (1.3 × 10 −4 bar ≤ P ≤ 5.3 × 10 −1 bar) over a wide range of H 2 /CO ratios (0.25-1000) using pure iron, pure nickel, and iron-nickel alloys. We analyze what gas species are produced and measure the CH 4 formation rate. Our results indicate that the CH 4 formation rate for iron catalysts strongly depends on both pressure and the H 2 /CO ratio, and that nickel is a more efficient catalyst at lower pressures and lower H 2 /CO ratios. This difference in catalytic properties between iron and nickel may come from the reaction steps concerning disproportionation of CO, hydrogenation of surface carbon, and the poisoning of the catalyst. These results suggest that nickel is important in the atmospheric re-entry of impact condensate, while iron is efficient in circumplanetary subnebulae. Our results also indicate that previous numerical models of iron catalysis based on experimental data at 1 bar considerably overestimate CH 4 formation efficiency at lower pressures, such as the solar nebula and the atmospheric re-entry of impact condensate.

show abstract

Section: Methane Formation Ratementioning

confidence: 80%

Section: Conditionsmentioning

confidence: 84%

Section: Catalystsmentioning

confidence: 94%

Section: Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

An experimental study on Fischer-Tropsch catalysis: Implications for impact phenomena and nebular chemistry

Sekine

Sugita

Shido

et al. 2006

Meteoritics &Amp; Planetary Science

View full text Add to dashboard Cite

show abstract

Model Studies of Surface Catalyzed Reactions

Sault

Goodman

1989

Advances in Chemical Physics

View full text Add to dashboard Cite

Sabatier‐Senderens Reduction

2010

Comprehensive Organic Name Reactions and Reagents

View full text Add to dashboard Cite

Sabatier and Senderens established nickel‐based hydrogenation and converted the unsaturated organic molecules into corresponding saturated compounds by passing the vapor of organic molecules and hydrogen over hot, finely divided nickel and is know as Sabatier–Senderens reduction. Purity of nickel and reaction temperature are the most critical parameters for this reaction. This reaction is different from reductions using nascent hydrogen as the reducing agent, such as amalgam of sodium in alcohol (alkaline condition) and or zinc or tin with hydrochloric acid (acidic medium). Further the study finds the successful conversion of oleic acid into stearic acid, acetone to isopropanol, carbon monoxide into methane or a gaseous mixture rich in methane, phenol and p ‐cresol into cyclohexanol and p ‐methylcyclohexanol, etc. It is also found that the reduced cobalt, iron, copper, and powdered platinum have catalytic activities similar to nickel and reduce the naphthalene into tetralin.

show abstract

Measurement of carbide buildup and removal kinetics on Ni(100)

Cited by 182 publications

References 11 publications

An experimental study on Fischer-Tropsch catalysis: Implications for impact phenomena and nebular chemistry

An experimental study on Fischer-Tropsch catalysis: Implications for impact phenomena and nebular chemistry

Model Studies of Surface Catalyzed Reactions

Sabatier‐Senderens Reduction

Contact Info

Product

Resources

About