Formation of H2O in the CH4-CO2 dry reforming process and its activation to this reaction over Ni-Fe/MC12A7 catalysts

Huang, Linyan; Ma, Yue; Niu, Mufan; Ren, Shenyong; Guo, Qiaoxia; Chen, Xu; Shen, Baojian

doi:10.1016/j.apcatb.2023.122822

Cited by 5 publications

(2 citation statements)

References 53 publications

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“…The Ni1Fe1 alloy gradually evolved into a stable Ni 3 Fe 1 alloy owing to the iron-surplus strategy, and the segregated Fe, in turn, formed FeO x , which played a role in carbon gasification, thereby reducing the amount of coke deposition and the degree of graphitization. Huang et al [171] indicated that the presence of Fe increased the lattice oxygen content of the Ni-Fe/MC12A7, resulting in the formation of a small amount of H 2 O through the reaction with CH 4 . The dissociation of H 2 O can decrease the surface coverage of C* (C* + H* → CH*,C* + OH* → CO* + H*) and consume C α on the catalyst [171].…”

Section: Fe-ni Catalystsmentioning

confidence: 99%

“…Huang et al [171] indicated that the presence of Fe increased the lattice oxygen content of the Ni-Fe/MC12A7, resulting in the formation of a small amount of H 2 O through the reaction with CH 4 . The dissociation of H 2 O can decrease the surface coverage of C* (C* + H* → CH*,C* + OH* → CO* + H*) and consume C α on the catalyst [171]. The kinetic study of the Fe-promoted Ni-MgO catalyst reveals that the surface oxygen coverage is determined by the Fe/Ni ratio and the contact atmosphere (CO 2 concentration), which influences the rate of coke deposition and the gasification rate without changing the kinetics and mechanism of the Ni catalyst (Figure 9) [172].…”

Section: Fe-ni Catalystsmentioning

confidence: 99%

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Recent Advances in Coke Management for Dry Reforming of Methane over Ni-Based Catalysts

Xu,

Park

2024

Catalysts

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The dry reforming of methane (DRM) is a promising method for controlling greenhouse gas emissions by converting CO2 and CH4 into syngas, a mixture of CO and H2. Ni-based catalysts have been intensively investigated for their use in the DRM. However, they are limited by the formation of carbonaceous materials on their surfaces. In this review, we explore carbon-induced catalyst deactivation mechanisms and summarize the recent research progress in controlling and mitigating carbon deposition by developing coke-resistant Ni-based catalysts. This review emphasizes the significance of support, alloy, and catalyst structural strategies, and the importance of comprehending the interactions between catalyst components to achieve improved catalytic performance and stability.

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Section: Fe-ni Catalystsmentioning

confidence: 99%

Section: Fe-ni Catalystsmentioning

confidence: 99%

Recent Advances in Coke Management for Dry Reforming of Methane over Ni-Based Catalysts

Xu,

Park

2024

Catalysts

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Unbounding the Future: Designing NiAl‐Based Catalysts for Dry Reforming of Methane

Zhang,

Zhao,

Song

et al. 2024

Chemistry An Asian Journal

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Dry reforming of methane (DRM), the catalytic conversion of CH4 and CO2 into syngas (H2 + CO), is an important process closely correlated to the environment and chemical industry. NiAl‐based catalysts have been reported to exhibit excellent activity, low cost, and environmental friendliness. At the same time, the rapid deactivation caused by carbon deposition, Ni sintering, and phase transformation exerts great challenges for its large‐scale applications. This review summarizes the recent advances in NiAl‐based catalysts for DRM, particularly focusing on the strategies to construct efficient and stable NiAl‐based catalysts. Firstly, the thermodynamics and elementary steps of DRM, including the activation of reactants and coke formation and elimination, are summarized. The roles of Al2O3 and its mixed oxides as the support, and the influences of the promoters employed in NiAl‐based catalysts over the DRM performance, are then illustrated. Finally, the design of anti‐coking and anti‐sintering NiAl‐based catalysts for DRM is suggested as feasible and promising by tailoring the structure and states of Ni and the modification of Al‐based supports including small Ni size, high Ni dispersion, proper basicity, strong metal‐support interaction (SMSI), active oxygen species as well as high phase stability.

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Modulating proportion of Ni0 species stabilized by Ni2+ on Ni-MgO catalyst with superior stability for dry reforming of methane

Liu,

Wen,

xie

et al. 2024

Chemical Engineering Journal

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Formation of H2O in the CH4-CO2 dry reforming process and its activation to this reaction over Ni-Fe/MC12A7 catalysts

Cited by 5 publications

References 53 publications

Recent Advances in Coke Management for Dry Reforming of Methane over Ni-Based Catalysts

Recent Advances in Coke Management for Dry Reforming of Methane over Ni-Based Catalysts

Unbounding the Future: Designing NiAl‐Based Catalysts for Dry Reforming of Methane

Modulating proportion of Ni0 species stabilized by Ni2+ on Ni-MgO catalyst with superior stability for dry reforming of methane

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