Multi-length scale 5D diffraction imaging of Ni–Pd/CeO2–ZrO2/Al2O3 catalyst during partial oxidation of methane

Operando 5D X-ray diffraction imaging reveals complex heterogeneities across multiple length scales in a catalytic reactor for the partial oxidation of methane reaction.

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Catalytic Performance of Calcium-Lanthanum co-doped Ceria (Ce0.85-xLa0.15CaxO2-δ) in Partial Oxidation of Methane

BULLETIN OF CHEMICAL REACTION ENGINEERING AND CATALYSIS ◽

10.9767/bcrec.16.3.10528.548-554 ◽

2021 ◽

Vol 16 (3) ◽

pp. 548-554

Author(s):

Qassam Sarmad ◽

U. M. Khan ◽

Mustafa Anwar ◽

A. H. Khoja ◽

M. Ali ◽

...

Keyword(s):

Partial Oxidation ◽

Sol Gel ◽

Performance Testing ◽

Combustion Method ◽

Catalytic Performance ◽

Partial Oxidation Of Methane ◽

X Ray Diffraction ◽

X Ray ◽

Oxidation Of Methane ◽

Gel Combustion

In this study, Ce0.85-xLa0.15CaxO2-δ was synthesized using sol-gel combustion method and appliedfor partial oxidation of methane (POM). The physicochemical properties of catalyst were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and thermogravimetric analysis (TGA). Material shows a pure cubical structure and is highly stable up to 850 °C. The performance testing indicated the conversion of CH4 is 65% and selectivity of H2 and CO are 28% and 8%, respectively. The performance indicated the catalyst has a potential to be used for partial oxidation of methane on a larger scale. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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A Decrease in NiO-MgO Phase Through Its Solid Solution Equilibrium with Tetragonal(La1−zSrz)2Ni1−yMgyO4−δ: Effect on Catalytic Partial Oxidation of Methane

Journal of Nanomaterials ◽

10.1155/2012/263568 ◽

2012 ◽

Vol 2012 ◽

pp. 1-10 ◽

Cited By ~ 4

Author(s):

Xiong Yin ◽

Liang Hong ◽

Zhengliang Gong

Keyword(s):

Electron Microscopy ◽

Solid Solution ◽

Partial Oxidation ◽

Methane Conversion ◽

Partial Oxidation Of Methane ◽

Catalytic Partial Oxidation ◽

X Ray Diffraction ◽

Oxide Mixture ◽

X Ray ◽

Oxidation Of Methane

Calcination of an oxide mixture consisting of 0.4 La2O3, 0.2 SrCO3,(1−x)NiO, andxMgO at800∘Cresults in an equilibrium between tetragonal(La1−zSrz)2Ni1−yMgyO4−δphase and NiO-MgO phase. Forming rock-salt NiO-MgO facilitates the NiO to join the tetragonal phase. The size of the NiO-MgO phase in the resulting composite is reduced with the increase in MgO (thexvalue). The composite thus obtained is used to catalyze partial oxidation of methane, and the maximum methane conversion of ca. 93% is achieved whenx=0.2. A further rise inxvalue results in a monotonic decrease in the methane conversion. X-ray diffraction, electron microscopy, and chemosorption all confirm a decrease in both size and amount of the supportedNi0clusters with the increase in MgO dosage. The reduction in size promotes the dispersion ofNi0sites and gives rise to both high activity and strong coking resistance.

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