Nickel-based catalyst derived from NiO–Ce0.75Zr0.25O2 nanocrystalline composite: Effect of the synthetic route on the partial oxidation of methane

Silveira, V.R. da; Melo, D.M.A.; Barros, Bráulio Silva; Ruiz, Juan Alberto Chávez; Rojas, L. O. A.

doi:10.1016/j.ceramint.2016.07.119

Cited by 11 publications

(3 citation statements)

References 22 publications

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“…Using low-cost noble metal-free catalysts, such as Fe-, ,− Co-, − and Ni-based ones, would be much more desirable. ,,− Ni-based catalysts have been widely investigated because of their low costs and relatively high activities. − It was found that the Ce 3+ /Ce 4+ and Ni 0 /Ni 2+ couples were involved in the reaction, with the occurrence of the reaction Ni 2+ + Ce 3+ → Ni 0 + Ce 4+ . The presence of Ni improved the mobility of CeO 2 lattice oxygen.…”

Section: Catalyst Developmentmentioning

confidence: 99%

Active Components of Catalysts of Methane Conversion to Synthesis Gas: Brief Perspectives

Zagaynov

2021

Energy Fuels

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Methane transformation into more valuable products has attracted extensive attention. Synthesis gas is an important intermediate product in the chemical industry. Several syngas production methods are available, depending on the purpose of the industrial application. A major limitation of the processes is the rapid deactivation of the catalyst, which has been commonly attributed to the sintering of the active sites of catalyst and carbon formations on these sites, induced by methane decomposition and CO disproportionation. The catalyst consists of an active component and support. Ceria-based systems have been extensively employed as the support because of their unique redox properties and high oxygen storage capacity. The most promising approach is to design an excellent active site of the catalyst, based on noble or transition metals. A comparison of perspective active components, especially polymetallic components, is considered here.

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Section: Catalyst Developmentmentioning

confidence: 99%

Active Components of Catalysts of Methane Conversion to Synthesis Gas: Brief Perspectives

Zagaynov

2021

Energy Fuels

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“…Partial oxidation of methane has received much attention in recent years due to its advantages compared with other process used to syngas production, such as slight exothermicity, high conversion and selectivity, very short residence time and an H 2 /CO molar ratio suitable for the methanol and Fischer-Tropsch synthesis [1][2][3][4][5][6][7]. Several catalysts have been studied in the reaction of partial oxidation of methane, among them the catalysts based on nickel [8], cobalt [9] and noble metals such as Pd [10], Pt [11], Ce [12], Rh, Ir and Ru [13]. Noble metals are significantly more expensive than transition metals, and its use as a catalyst become limited.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of NiCo2O4 spinel as a catalyst for partial oxidation of methane

et al. 2019

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The NiCo 2 O 4 catalyst with spinel structure was prepared by a modified polymeric-precursor method using gelatin as an organic-directing agent. The obtained powder was characterized by XRD, TPR and tested on the partial oxidation of methane. The Rietveld analysis performed on the XRD pattern confirmed the crystallization of two phases, the spinel NiCo 2 O 4 , and a solid solution Ni x Co 1-x O. TPR profile revealed that both phases are entirely reduced up to 610 °C. The catalyst showed CH 4 conversion of 75 % with H 2 /CO ratio around 2 and no signal of deactivation by coke formation, such as confirmed by XRD and TG analysis carried out after the catalytic test.

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“…In contrast, Fe, Ti, Al, Zr and Al as whole Bsite occupants were reported to have relatively low conversion and syngas selectivity (<90%), which was improved via partial substitution with Ni or Co. Moreover, the co-doping of Al and Fe in B-site was reported to improve the stability of perovskites in POM[141][142][143].…”

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confidence: 99%

Catalytic partial oxidation of methane to syngas: review of perovskite catalysts and membrane reactors

Elbadawi

et al. 2020

Catalysis Reviews

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Partial oxidation of methane (POM) offers a promising option to produce syngas for downstream processes such as hydrogen production and Fischer-Tropsch processes. POM in fixed-bed reactors requires an oxygen separation plant with high operation cost and safety risks.On the contrary, membrane reactors can provide an improved process by integrating both oxygen separation and catalytic reaction processes. With many advantages including high purity and efficient oxygen separation from the air at the catalytic reaction conditions, mixed ionic-electronic conducting membranes (MIEC) caught great attention in the scientific research field over the past two decades. In this review, POM using different catalysts in fixed-bed reactors was firstly summarised with emphasizing on perovskite-based catalysts, and then the material screening of MIEC membrane reactors was introduced and linked to the selection of conventional and perovskite catalysts. The catalytic activity, reaction mechanisms, and emerging challenges have been analyzed. Furthermore, future research directions have been outlined by highlighting the effect of electronic properties, continuous reduction-oxidation in the presence of oxygen flux, and chemical reaction mechanism on membrane/catalyst.

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Nickel-based catalyst derived from NiO–Ce0.75Zr0.25O2 nanocrystalline composite: Effect of the synthetic route on the partial oxidation of methane

Cited by 11 publications

References 22 publications

Active Components of Catalysts of Methane Conversion to Synthesis Gas: Brief Perspectives

Active Components of Catalysts of Methane Conversion to Synthesis Gas: Brief Perspectives

Performance evaluation of NiCo2O4 spinel as a catalyst for partial oxidation of methane

Catalytic partial oxidation of methane to syngas: review of perovskite catalysts and membrane reactors

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