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Dry Reforming of Methane over Ni/WC Catalysts

2025-08-26Artigo científico Acesso aberto
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dc.contributor.authorBolatova, Zhanar
dc.contributor.authorKuznetsova, Svetlana
dc.contributor.authorVedishcheva, Olga
dc.contributor.authorCarabineiro, Sónia A. C.
dc.contributor.authorKolobova, Ekaterina
dc.contributor.authorPestryakov, Alexey
dc.contributor.institutionLAQV@REQUIMTE
dc.contributor.institutionDQ - Departamento de Química
dc.contributor.pblMolecular Diversity Preservation International (MDPI)
dc.date.accessioned2026-01-14T16:43:19Z
dc.date.available2026-01-14T16:43:19Z
dc.date.issued2025-08-26
dc.description.abstractDry reforming of methane (DRM) into synthesis gas (CO + H2) is one of the most important chemical reactions for industrial hydrogen production. It also enables the synthesis of hydrocarbons (liquid fuels) and other valuable products, providing an effective route for utilizing greenhouse gases. However, a major challenge limiting the implementation and scale-up of DRM is the high cost of stable and active noble metal-based catalysts, or the rapid deactivation of nickel- and cobalt-based catalysts due to coking and sintering of the active metal particles. In this context, the present work demonstrates that combining a highly active and inexpensive component (Ni) with tungsten carbide produces a composite material exhibiting high catalytic activity and resistance to oxidation and coking during DRM. Tungsten carbide was synthesized using a vacuum-free electric arc method, and nickel was subsequently deposited in varying amounts (1–25 wt.%) using the deposition–precipitation method with NaOH (DP). The resulting catalysts were characterized by X-ray diffraction, temperature-programmed reduction and Raman spectroscopy. Their performance was evaluated under DRM conditions, at atmospheric pressure and 800 °C, using different CH4:CO2 ratios. The most effective oxidation/(re)carbonization cycle, ensuring catalyst stability during DRM by balancing the rates of carbon formation and removal from the catalyst surface, was achieved with a nickel content of 20 wt.% and a CH4 to CO2 ratio of 0.67 in the feed gas mixture.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent17
dc.format.extent2806885
dc.identifier.doi10.3390/ma18173990
dc.identifier.issn1996-1944
dc.identifier.otherPURE: 151550050
dc.identifier.otherPURE UUID: c3cb7799-1840-47e3-91a9-a7399834f245
dc.identifier.otherWOS: 001571415900001
dc.identifier.otherPubMed: 40942416
dc.identifier.otherORCID: /0000-0001-9913-4671/work/201753719
dc.identifier.otherScopus: 105016012666
dc.identifier.urihttp://hdl.handle.net/10362/199129
dc.identifier.urlhttps://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=nova_api&SrcAuth=WosAPI&KeyUT=WOS:001571415900001&DestLinkType=FullRecord&DestApp=WOS_CPL
dc.identifier.urlhttps://www.scopus.com/pages/publications/105016012666
dc.language.isoeng
dc.peerreviewedyes
dc.subjectCH4 dry reforming
dc.subjectNi-based catalyst
dc.subjectCatalyst stability
dc.subjectOxidation and coking resistance
dc.subjectTungsten carbide
dc.titleDry Reforming of Methane over Ni/WC Catalystsen
dc.title.subtitleEffect of Ni Content and CH4:CO2 Ratioen
dc.typejournal article
degois.publication.firstPage1
degois.publication.issue7
degois.publication.lastPage17
degois.publication.titleMaterials
degois.publication.volume18
dspace.entity.typePublication
rcaap.rightsopenAccess

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