Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
The Reasons for Nonlinear Phenomena in Oxidation of Methane over Nickel. / Saraev, A. A.; Vinokurov, Z. S.; Shmakov, A. N. и др.
в: Kinetics and Catalysis, Том 59, № 6, 01.11.2018, стр. 810-819.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - The Reasons for Nonlinear Phenomena in Oxidation of Methane over Nickel
AU - Saraev, A. A.
AU - Vinokurov, Z. S.
AU - Shmakov, A. N.
AU - Kaichev, V. V.
AU - Bukhtiyarov, V. I.
PY - 2018/11/1
Y1 - 2018/11/1
N2 - Abstract: The catalytic oxidation of methane over nickel foil is studied. It is shown that, under the oxygen-lean conditions in the regime of a flow-type reactor, nonlinear phenomena can appear in the form of self-sustained oscillations of the reaction rate and the catalyst temperature. To determine the reasons for self-sustained oscillations, X-ray diffraction and mass spectrometry in the operandо mode were used. It was found that the appearance of oscillations in the methane oxidation is due to periodical oxidation–reduction of the surface layer of nickel foil; metallic nickel has a higher catalytic activity than NiO. The oscillations of the catalyst temperature are determined by the occurrence of exothermic and endothermic processes associated with the reduction of nickel oxide and methane oxidation on the surface of metallic nickel.
AB - Abstract: The catalytic oxidation of methane over nickel foil is studied. It is shown that, under the oxygen-lean conditions in the regime of a flow-type reactor, nonlinear phenomena can appear in the form of self-sustained oscillations of the reaction rate and the catalyst temperature. To determine the reasons for self-sustained oscillations, X-ray diffraction and mass spectrometry in the operandо mode were used. It was found that the appearance of oscillations in the methane oxidation is due to periodical oxidation–reduction of the surface layer of nickel foil; metallic nickel has a higher catalytic activity than NiO. The oscillations of the catalyst temperature are determined by the occurrence of exothermic and endothermic processes associated with the reduction of nickel oxide and methane oxidation on the surface of metallic nickel.
KW - heterogeneous catalysis
KW - methane oxidation
KW - nickel
KW - reaction mechanism
KW - self-oscillations
KW - KINETIC OSCILLATIONS
KW - IN-SITU XPS
KW - BEHAVIOR
KW - PROPANE
KW - SELF-SUSTAINED OSCILLATIONS
KW - OXYGEN
KW - REDUCTION
KW - CATALYTIC-OXIDATION
KW - PROPYLENE
KW - OXIDES
UR - http://www.scopus.com/inward/record.url?scp=85062637684&partnerID=8YFLogxK
U2 - 10.1134/S0023158418060149
DO - 10.1134/S0023158418060149
M3 - Article
AN - SCOPUS:85062637684
VL - 59
SP - 810
EP - 819
JO - Kinetics and Catalysis
JF - Kinetics and Catalysis
SN - 0023-1584
IS - 6
ER -
ID: 18808651