Mechanistic study of partial oxidation of methane to synthesis gas over supported rhodium and ruthenium catalysts using in situ time-resolved FTIR spectroscopy

Weng, Wei Zheng; Chen, Mingshu; Yan, Qian Gu; Wu, Ting; Chao, Zi‐Sheng; Liao, Yuan Yan; Wan, Hui

doi:10.1016/s0920-5861(00)00475-2

Cited by 66 publications

(31 citation statements)

References 15 publications

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“…In the suggested mechanism, methane is homolitically dissociated and CO, H 2 , and H 2 O are formed from the decomposition of a formaldehyde precursor, while CO 2 is obtained from decomposition of formed bicarbonate and further oxidation of dioxymethylene. Wheng et al [21] investigated the mechanism of partial oxidation of methane on Rh/SiO 2 , Ru/SiO 2 and Ru/Al 2 O 3 catalyts. For Rh/SiO 2 these authors identified CO as a primary product, indicating the direct mechanism for this catalyst.…”

Section: Discussionmentioning

confidence: 99%

RETRACTED ARTICLE: Effect of the support on the mechanism of partial oxidation of methane on platinum catalysts

et al. 2006

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temperature programmed surface reaction (TPSR) studies showed partial oxidation of methane comprehends two steps: combustion of methane followed by CO 2 , and steam reforming of unreacted methane, while for Pt/Y 2 O 3 a direct mechanism was observed. Oxygen Storage Capacity (OSC) evaluated the reducibility and oxygen transfer capacity of the catalysts. Pt/CeO 2 catalyst showed the highest stability on partial oxidation. The results were explained by the higher reducibility and oxygen storage/release capacity which allowed a continuous removal of carbonaceous deposits from the active sites, favoring the stability of the catalyst, For Pt/Al 2 O 3 and Pt/ZrO 2 catalysts the increase of carbon deposits around or near the metal particle inhibits the CO 2 dissociation on CO 2 reforming of methane. Pt/Y 2 O 3 was active and stable for partial oxidation of methane, and its behavior was explained by a change in the reaction mechanism.

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Section: Discussionmentioning

confidence: 99%

RETRACTED ARTICLE: Effect of the support on the mechanism of partial oxidation of methane on platinum catalysts

et al. 2006

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“…In the suggested mechanism, methane is homolitically dissociated and CO, H 2 and H 2 O are formed from the decomposition of a formaldehyde precursor, while CO 2 is obtained from decomposition of formed bicarbonate and further oxidation of dioxymethylene. Wheng et al [21] investigated the mechanism of partial oxidation of methane on Rh/ SiO 2 , Ru/SiO 2 and Ru/Al 2 O 3 catalysts. For Rh/SiO 2 these authors identified CO as a primary product, indicating the direct mechanism for this catalyst.…”

Section: Discussionmentioning

confidence: 99%

Effect of the support on the mechanism of partial oxidation of methane on platinum catalysts

et al. 2006

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temperature programmed surface reaction (TPSR) studies showed partial oxidation of methane comprehends two steps: combustion of methane followed by CO 2 and steam reforming of unreacted methane, while for Pt/Y 2 O 3 a direct mechanism was observed. Oxygen Storage Capacity (OSC) evaluated the reducibility and oxygen transfer capacity of the catalysts. Pt/CeO 2 catalyst showed the highest stability on partial oxidation. The results were explained by the higher reducibility and oxygen storage/release capacity which allowed a continuous removal of carbonaceous deposits from the active sites, favoring the stability of the catalyst. For Pt/Al 2 O 3 and Pt/ZrO 2 catalysts the increase of carbon deposits around or near the metal particle inhibits the CO 2 dissociation on CO 2 reforming of methane. Pt/Y 2 O 3 was active and stable for partial oxidation of methane and its behaviour was explained by a change in the reaction mechanism.

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“…The implementation of the HCO(s) in the kinetic model presented in this work is supported experimentally by TPRS and TR-FTIR experiments [89] and theoretically by the UBI-QEP method [54,90] as well as DFT studies [36][37][38]. Our previous mechanism [46] is used as a reference for the kinetic data for the reaction steps R47 and R50, where HCO(s) is produced from CO(s) and from CH(s).…”

Section: Hco On Ni Surfacementioning

confidence: 82%

Surface Reaction Kinetics of Steam- and CO2-Reforming as Well as Oxidation of Methane over Nickel-Based Catalysts

et al. 2015

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An experimental and kinetic modeling study on the Ni-catalyzed conversion of methane under oxidative and reforming conditions is presented. The numerical model is based on a surface reaction mechanism consisting of 52 elementary-step like reactions with 14 surface and six gas-phase species. Reactions for the conversion of methane with oxygen, steam, and CO2 as well as methanation, water-gas shift reaction and carbon formation via Boudouard reaction are included. The mechanism is implemented in a one-dimensional flow field description of a fixed bed reactor. The model is evaluated by comparison of numerical simulations with data derived from isothermal experiments in a flow reactor over a powdered nickel-based catalyst using varying inlet gas compositions and operating temperatures. Furthermore, the influence of hydrogen and water as co-feed on methane dry reforming with CO2 is also investigated.

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Mechanistic study of partial oxidation of methane to synthesis gas over supported rhodium and ruthenium catalysts using in situ time-resolved FTIR spectroscopy

Cited by 66 publications

References 15 publications

RETRACTED ARTICLE: Effect of the support on the mechanism of partial oxidation of methane on platinum catalysts

RETRACTED ARTICLE: Effect of the support on the mechanism of partial oxidation of methane on platinum catalysts

Effect of the support on the mechanism of partial oxidation of methane on platinum catalysts

Surface Reaction Kinetics of Steam- and CO2-Reforming as Well as Oxidation of Methane over Nickel-Based Catalysts

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