Catalytic oxidative coupling of methane over alkali, alkaline earth and rare earth metal oxides

Bi, Yingpu; Zhen, Kaiji; Jiang, Yutao; Chiwen, Teng

doi:10.1016/s0166-9834(00)80948-3

Cited by 44 publications

(19 citation statements)

References 5 publications

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“…The addition of a reducible oxide, such as SnO 2 , to Li/ MgO further increases the activity of the catalyst (35,(47)(48)(49). The oxidation state of Sn in the Sn/Li/MgO catalyst was investigated by means of Mössbauer spectroscopy.…”

Section: Reactivity Of Surface Lattice Oxygenmentioning

confidence: 99%

An Investigation of the Oxygen Pathways in the Oxidative Coupling of Methane over MgO-Based Catalysts

Mallens

Hoebink

Marin

1996

Journal of Catalysis

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The oxidative coupling of methane to ethane and ethene has been investigated by admitting pulses of pure methane, pure oxygen, and mixtures of methane and oxygen to MgO, Li/MgO, and Sn/Li/MgO at temperatures ranging from 923 to 1073 K in a Temporal Analysis of Products (TAP) set-up. Moreover, pulses of oxygen followed by pulses of either methane, ethane, ethene, or carbon monoxide were applied to study the role of both adsorbed oxygen and surface lattice oxygen in the reaction mechanism.

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Section: Reactivity Of Surface Lattice Oxygenmentioning

confidence: 99%

An Investigation of the Oxygen Pathways in the Oxidative Coupling of Methane over MgO-Based Catalysts

Mallens

Hoebink

Marin

1996

Journal of Catalysis

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“…The combination of L1 and Ianthanide promoters for MgO gives C2 selectivity of 98.4% at conversion of 25% [61].…”

Section: Review Of Ocm Catalysts mentioning

confidence: 99%

Oxidative Coupling of Methane Using Inorganic Membrane Reactors

Ma¹,

Moser²,

Dixon³

et al. 1998

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“…Basically the data presented only catalytic activity as mentioned above [8] that did not explain sufficiently the performance and the effect of ceria in light of specific structural properties. Therefore the aim of this work was to investigate the structural and electronic modifications attributed to ceria in samples that may explain its improvement in OCM reaction conduction.…”

Section: Introductionmentioning

confidence: 96%

“…It has been proposed that the use of rare earth metal oxides increased the stability as compared to systems like Li/MgO catalysts. Yingli et al [8] proposed it was possible to improve the selectivity and activity of the Li/MgO catalyst with the addition of small amounts of ceria (CeO 2 ). Earlier studies over rare-earth oxides indicated that the basicity is crucial in OCM [9].…”

Section: Introductionmentioning

confidence: 99%

Promoting Effect of Ce on the Oxidative Coupling of Methane Catalysts

et al. 2010

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The promoting effect of ceria was studied on the oxidative coupling of methane reaction with Li/Ce/ MgO and Na/Ce/MgO. Catalytic tests were conducted with unpromoted Li/MgO and Na/MgO catalysts and showed that samples doped with ceria affected the OCM reaction. In situ XRD results showed growth of MgO and CeO 2 crystallites on the Na/Ce/MgO, decreasing the activity and selectivity. The Li/Ce/MgO catalyst presented small and stable crystallites which increased markedly the activity, selectivity and stability. In addition, Diffusion Reflectance Spectroscopy (DRS) results of calcined samples revealed the charge transfer from cerium to oxygen ions, as well as oxygen transfer into the lattice. Different sites may influence the selectivity in C 2 and C 2 yield. The Li/Ce/MgO catalyst presented higher methane conversion and C 2 selectivity than the Na/Ce/MgO catalyst, probably due to different types of involved active site promoted by ceria during the reaction.

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Catalytic oxidative coupling of methane over alkali, alkaline earth and rare earth metal oxides

Cited by 44 publications

References 5 publications

An Investigation of the Oxygen Pathways in the Oxidative Coupling of Methane over MgO-Based Catalysts

An Investigation of the Oxygen Pathways in the Oxidative Coupling of Methane over MgO-Based Catalysts

Oxidative Coupling of Methane Using Inorganic Membrane Reactors

Promoting Effect of Ce on the Oxidative Coupling of Methane Catalysts

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