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Tyulenin, Yu. P.; Savkin, V. V.; Sinev, M. Yu.; Корчак, В. Н.

doi:10.1023/a:1021698923193

Cited by 10 publications

(6 citation statements)

References 11 publications

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“…Tyulenin et al [30] have also observed oscillatory behaviour in the kinetics of methane oxidation over a chromelalumel thermocouple but our results differ from their results in two important respects. First, Tyulenin et al found the thermocouple to be active only in the presence of a Nd 2 O 3 /MgO mixed oxide catalyst.…”

Section: Comparison With Previous Workcontrasting

confidence: 99%

“…Contrary to the results of Tyulenin et al [30], the thermocouple was active when no other catalyst was present. The oscillations were observed in the reactant and product concentrations as well as in the temperature, and are thought to be caused by the cyclic oxidation and reduction of nickel.…”

Section: Introductioncontrasting

confidence: 96%

“…Such oscillations have been observed over palladium catalysts [24][25][26][27], and supported nickel catalysts [11,28,29]. There has also been a recent report [30] of oscillations occurring over an Nd 2 O 3 /MgO catalyst containing an exposed chromel-alumel thermocouple.…”

Section: Introductionmentioning

confidence: 86%

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Zhang¹,

Mingos²,

Hayward³

2001

Catalysis Letters

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Section: Comparison With Previous Workcontrasting

confidence: 99%

Section: Introductioncontrasting

confidence: 96%

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Zhang¹,

Mingos²,

Hayward³

2001

Catalysis Letters

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“…Such oscillations have been observed over palladium catalysts [9±12] and supported nickel catalysts [3,13,14]. There has also been a report [15] of oscillations occurring over an Nd 2 O 3 /MgO catalyst containing an exposed chromelalumel thermocouple.…”

Section: Introductionmentioning

confidence: 88%

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2002

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The study of the partial oxidation of methane over nickel foils has been carried out over a wide range of reactor temperatures (748± 930 8C) and feed-gas compositions (Ar/CH 4 /O 2 ), ranging from 30 : 29 : 1 to 30 : 12 : 18 cm 3 min ÿ1 at atmospheric pressure. The product formation shows pronounced oscillations. A modi®ed thermocouple was designed to measure the temperature while the interposed nickel foil worked as a catalyst. The oscillations have been attributed to the cyclic reduction and oxidation of the nickel surface in the speci®c reaction environment at elevated temperatures.

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“…Such oscillations have been observed over palladium catalysts [3][4][5][6], and supported nickel catalysts [7][8][9]. There has also been a report of oscillations occurring over an Nd 2 O 3 /MgO catalyst containing an exposed chromel-alumel thermocouple [10]. However, the oscillatory mechanism is still not understood in detail, although it is generally accepted that the cyclic oxidation/reduction process is responsible for the oscillation [8,9].…”

Section: Introductionmentioning

confidence: 99%

Oscillatory behaviour during the partial oxidation of methane over cobalt wires and foils

Zhang

Lee

Mingos

et al. 2003

Applied Catalysis A: General

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The oscillatory behaviour over cobalt wire and foil catalysts was examined at atmospheric pressure under various reaction temperatures and argon/methane/oxygen feed gas compositions for the partial oxidation of methane. Rough and porous oxide layers on the catalyst surface were confirmed by scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The results obtained from the experimental studies indicated that the oscillatory behaviour exhibited during methane oxidation was related to the behaviour of the catalyst surface switching back and forth from the reduced state to the oxidised state. The reduction of the oxide layer followed by the almost immediate re-oxidation of the metal can be accounted for only if the oxide layer formed by oxidation is different from the oxide layer existing during reduction.

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Cited by 10 publications

References 11 publications

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Oscillatory behaviour during the partial oxidation of methane over cobalt wires and foils

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