Investigation of the Reaction of Partial Oxidation of Methane over Ni/La<sub>2</sub>O<sub>3</sub> Catalyst

Fleys, Matthieu; Simon, Yves; Świerczyński, Dariusz; Kiennemann, A.; Marquaire, Paul-Marie

doi:10.1021/ef0602729

Cited by 47 publications

(27 citation statements)

References 46 publications

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“…For NiMgZn‐f catalyst the presence of MgO was not detected by XRD (Figure Ab). The reason may be that the MgO particles are highly dispersed or amorphous in nature, which are not detectable by the XRD analysis . Earlier reports also revealed that the particles with crystallite size less than 5 nm are not detectable by XRD analysis .…”

Section: Resultsmentioning

confidence: 98%

Promoting Effect of CeO₂and MgO for CO₂Reforming of Methane over Ni-ZnO Catalyst

et al. 2016

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The purpose of this study was to find out the effect of CeO2 and MgO (as a promoter) on CO2 reforming of methane or dry reforming of methane (DRM) for the production of synthesis gas. In this aspect, CeO2 and MgO promoted Ni‐nanoparticles supported ZnO catalyst was prepared by surfactant induced hydrothermal method, using cetyltrimethylammonium bromide (CTAB) as surfactant, morphology controlling agent and polyvinylpyrrolidone (PVP) as size controlling agent. The prepared catalysts were characterized by BET‐Surface area, X‐ray diffraction study (XRD), Scanning Electron Microscropy (SEM), Transmission Electron Microscopy (SEM), Inductively coupled plasma atomic emission spectroscopy (ICPAES), Temperature Programmed Reduction (TPR), X‐ray Photoelectron Spectroscopy (XPS) and Thermogravimetric Analysis (TGA) techniques. Highly basic nature of MgO and excellent redox properties of CeO2 increased nickel dispersion and created strong metal‐support interaction, which effectively reduced the coke deposition on the catalyst surface. MgO promoted Ni‐ZnO catalyst showed better low temperature activity compared to CeO2 promoted Ni‐ZnO catalyst for DRM and Ni‐MgO/ZnO catalyst also exhibited better coke resistivity, because of comparatively smaller nickel nanoparticles. Both the promoted catalysts showed more than 24 h of time on stream (TOS) stability at 800 °C without any significant deactivation of the catalysts. The catalysts produced H2/CO ratio 0.99 at 800 °C during the TOS.

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Section: Resultsmentioning

confidence: 98%

Promoting Effect of CeO₂and MgO for CO₂Reforming of Methane over Ni-ZnO Catalyst

et al. 2016

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“…51, 52 Several research groups have investigated the effect of metal loading on the COMR performance to optimize the metal content. In general, a large enhancement in COMR performance is observed with increasing metal content until a certain threshold;44, 46, 53 however, exceptions have been noted for certain catalyst systems 54. 55…”

Section: Comr Catalystsmentioning

confidence: 95%

Energy‐Efficient Syngas Production through Catalytic Oxy‐Methane Reforming Reactions

2008

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The considerable recent interest in the conversion of stranded methane into transportable liquids as well as fuel cell technology has provided a renewed impetus to the development of efficient processes for the generation of syngas. The production of syngas (CO/H2), a very versatile intermediate, can be the most expensive step in the conversion of methane to value-added liquid fuels. The catalytic oxy reforming of methane, which is an energy-efficient process that can produce syngas at extremely high space-time yields, is discussed in this Review. As long-term catalyst performance is crucial for the wide-scale commercialization of this process, catalyst-related studies are abundant. Correspondingly, herein, emphasis is placed on discussing the different issues related to the development of catalysts for oxy reforming. Important aspects of related processes such as catalytic oxy-steam, oxy-CO2, and oxy-steam-CO2 processes will also be discussed.

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“…[1][2][3] Two groups of catalyst have been used for methane activation to generate syngas: Ni-based catalysts and noble metal-based catalysts (Rh, Ru, Ir, Pd, Pt). In particular, nickel-based catalysts were widely adopted because of their low price and stability for extended periods when compared with noble metals with high cost and limited availability.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, from these studies, it appears that the oxidation state of nickel controls the mechanism and the product distribution, and CH 4 is oxidized by lattice oxygen in NiO or by active oxygen within the support. [1][2][3] Up to now, the reaction mechanism of the catalytic partial oxidation of methane still remains unclear and a unified viewpoint has not been reached. The reaction can proceed either via the direct way where CO and H 2 are produced as primary products 4,5 or via the indirect way where methane combustion produces CO 2 and H 2 O followed by steam and CO 2 reforming of the remaining methane.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study on the gas‐phase reaction mechanism between nickel monoxide and methane for syngas production

Yang

Qin

2009

J Comput Chem

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The comprehensive mechanism survey on the gas-phase reaction between nickel monoxide and methane for the formation of syngas, formaldehyde, methanol, water, and methyl radical has been investigated on the triplet and singlet state potential energy surfaces at the B3LYP/6-311++G(3df, 3pd)//B3LYP/6-311+G(2d, 2p) levels. The computation reveals that the singlet intermediate HNiOCH(3) is crucial for the syngas formation, whereas two kinds of important reaction intermediates, CH(3)NiOH and HNiOCH(3), locate on the deep well, while CH(3)NiOH is more energetically favorable than HNiOCH(3) on both the triplet and singlet states. The main products shall be syngas once HNiOCH(3) is created on the singlet state, whereas the main products shall be methyl radical if CH(3)NiOH is formed on both singlet and triplet states. For the formation of syngas, the minimal energy reaction pathway (MERP) is more energetically preferable to start on the lowest excited singlet state other than on the ground triplet state. Among the MERP for the formation of syngas, the rate-determining step (RDS) is the reaction step for the singlet intermediate HNiOCH(3) formation involving an oxidative addition of NiO molecule into the C-H bond of methane, with an energy barrier of 120.3 kJ mol(-1). The syngas formation would be more effective under higher temperature and photolysis reaction condition.

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Investigation of the Reaction of Partial Oxidation of Methane over Ni/La₂O₃ Catalyst

Cited by 47 publications

References 46 publications

Promoting Effect of CeO₂and MgO for CO₂Reforming of Methane over Ni-ZnO Catalyst

Promoting Effect of CeO₂and MgO for CO₂Reforming of Methane over Ni-ZnO Catalyst

Energy‐Efficient Syngas Production through Catalytic Oxy‐Methane Reforming Reactions

Theoretical study on the gas‐phase reaction mechanism between nickel monoxide and methane for syngas production

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Investigation of the Reaction of Partial Oxidation of Methane over Ni/La2O3 Catalyst

Cited by 47 publications

References 46 publications

Promoting Effect of CeO2and MgO for CO2Reforming of Methane over Ni-ZnO Catalyst

Promoting Effect of CeO2and MgO for CO2Reforming of Methane over Ni-ZnO Catalyst

Energy‐Efficient Syngas Production through Catalytic Oxy‐Methane Reforming Reactions

Theoretical study on the gas‐phase reaction mechanism between nickel monoxide and methane for syngas production

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Investigation of the Reaction of Partial Oxidation of Methane over Ni/La₂O₃ Catalyst

Promoting Effect of CeO₂and MgO for CO₂Reforming of Methane over Ni-ZnO Catalyst

Promoting Effect of CeO₂and MgO for CO₂Reforming of Methane over Ni-ZnO Catalyst