Unraveling the oscillation reaction of Ni catalyst during partial oxidation of methane

Title
Unraveling the oscillation reaction of Ni catalyst during partial oxidation of methane
Authors
이대희D. Kim김주선문주호
Issue Date
2013-06
Publisher
PACRIM10
Citation
, 64-64
Abstract
Oscillatory behavior during partial oxidation ofmethanewould give us a clue to understand the detailed mechanisms of heterogeneous catalysis. It is reported that oscillations of reaction rate, temperature and potential of catalyst are observed during partial oxidation of methane under the given temperature and pressure conditions. Although the cyclic adsorption and diffusion of oxygen into the subsurface of nickel is generally recognized as themain reason for oscillation behavior, the exact kinetics and equilibrium condition of heterogeneous surface reactions, that determine the amplitude and period of oscillation, need to be clarified to elucidate the mechanisms of heterogeneous catalysis. In this study, we introduce electrochemical characterizations for in situ analysis of nickel surfaces that undergo the repeated redox cycle. Information about polarization characteristics as well as the concentration of mobile charge species enables us to determine real time variation of nickel surface during the redox cycle so that the oxidation of surface differs depending on the locationwhether it is the active site for the catalytic reactionornot.
URI
http://pubs.kist.re.kr/handle/201004/45040
Appears in Collections:
KIST Publication > Conference Paper
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