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Carbon formation on nickel and nickel-copper alloy catalysts
- Alstrup, I.; Tavares, Teresa; Bernardo, C.A.; Sørensen, O.; Rostrup-Nielsen, J. R.
- Materials and Corrosion - Werkstoffe und Korrosion, 49, 367-372, 1998
Publisher: WILEY-VCH Verlag
Abstract
Equilibrium, kinetic and morphological studies of carbon formation in CH4+H2, CO, and CO+H2 gases on silica supported nickel and nickel-copper catalysts are reviewed. The equilibrium deviates in all cases from graphite equilibrium and more so in CO+CO2 than in CH4+H2. A kinetic model based on information from surface science results with chemisorption of CH4 and possibly also the first dehydrogenation step as rate controlling describes carbon formation on nickel catalyst in CH4+H2 well. The kinetics of carbon formation in CO and CO+H2 gases are in agreement with CO disproportionation ...
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