Pt-implanted intermetallides as the catalysts for CH4–CO2 reforming

Arkatova, L. A.; Pakhnutov, Oleg V.; Shmakov, A. N.; Naiborodenko, Yury S.; Kasatsky, Nikolai G.

doi:10.1016/j.cattod.2011.03.014

Cited by 13 publications

(10 citation statements)

References 44 publications

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“…Based on analysis of the TG/DSC results, two different types of carbon species are observed at 520–660 and 710–1010 K, for Ni/Al 2 O 3 and CuNi/Al 2 O 3 , respectively, indicating easily oxidized carbon and inert carbon 27. 32, 42, 43 The easily oxidized carbon species are preferentially formed during the early stage of reforming for the formation of syngas, while the relatively inert carbon species are accumulated with the reaction time, which would cause degradation of the catalyst for longer time on stream.…”

Section: Resultsmentioning

confidence: 99%

“…D. Li et al. has summarized the effects of noble metals added as second metallic component on the catalytic performances of nickel and the resistance of deactivation,28 and the use of Ni‐based bimetallic catalysts have been continuously reported, including Pt+Ni,29–32 Pd+Ni,29, 33 Co+Ni,4, 34–36 and Cu+Ni,37, 38 which significantly reduced the amounts of coke in reaction. Notably, however, for all of these catalysts, the two metals are co‐impregnated onto catalytic supports, which cannot assure the effective formation of alloy and the self‐existence of active component always happens.…”

Section: Introductionmentioning

confidence: 99%

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The Key Points of Highly Stable Catalysts for Methane Reforming with Carbon Dioxide

Liu

Guan

et al. 2013

ChemCatChem

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Stable catalysis performance in long‐term operation is crucial for the wide‐scale industrialization of catalytic processes. The degradation of catalysts is a considerable problem for methane reforming with carbon dioxide, owing to carbon deposition on active sites and/or catalytic supports, and sintering of active components at high temperatures. With base metals and a modified alumina support, the present work has developed highly stable catalysts that operate free of coke formation and sintering of active components. Firstly, homogeneous copper‐nickel alloy nanoparticles (NPs), which have never previously been used for this purpose, were produced and then supported as catalytic centers onto alumina. The CuNi alloy catalyst with a Ni to Cu ratio of unity totally prohibits carbon deposition on active centers, while maintaining high activity for the reforming reaction. Second, the modification of alumina by coating with zirconia before supporting the CuNi alloy, drastically inhibits coke formation on the support, prevents the reaction of Cu in the alloy with alumina at high temperatures, and, therefore, promotes the stability of active alloy NPs. Additionally, after supporting the CuNi alloy NPs on zirconia‐coated alumina, the catalyst was coated with a thinner layer of zirconia to protect the CuNi NPs from sintering, while maintaining high activity. This state‐of‐the‐art catalyst is shown to be highly stable for methane reforming with carbon dioxide at high temperatures and the deactivation constant is calculated to be close to zero in a long‐term operation, even at extremely high space velocity of 120 000 mL g−1 h−1. The results are practically important to develop robust, as well as high performance, catalysts for the relevant reactions.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Key Points of Highly Stable Catalysts for Methane Reforming with Carbon Dioxide

Liu

Guan

et al. 2013

ChemCatChem

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“…Research works on these materials are still carried out, however the main activities are now being shifted toward a development of processing technologies (e.g., that allows producing strips or foils with a nanocrystalline structure, etc. ) as well as catalytic materials [22,23,24,25,26,27,28,29,30,31,32,33,34,35] and intermetallic matrix composites [36,37,38,39,40]. …”

Section: Introductionmentioning

confidence: 99%

Applications of Ni3Al Based Intermetallic Alloys—Current Stage and Potential Perceptivities

2015

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The paper presents an overview of current and prospective applications of Ni3Al based intermetallic alloys—modern engineering materials with special properties that are potentially useful for both structural and functional purposes. The bulk components manufactured from these materials are intended mainly for forging dies, furnace assembly, turbocharger components, valves, and piston head of internal combustion engines. The Ni3Al based alloys produced by a directional solidification are also considered as a material for the fabrication of jet engine turbine blades. Moreover, development of composite materials with Ni3Al based alloys as a matrix hardened by, e.g., TiC, ZrO2, WC, SiC and graphene, is also reported. Due to special physical and chemical properties; it is expected that these materials in the form of thin foils and strips should make a significant contribution to the production of high tech devices, e.g., Micro Electro-Mechanical Systems (MEMS) or Microtechnology-based Energy and Chemical Systems (MECS); as well as heat exchangers; microreactors; micro-actuators; components of combustion chambers and gasket of rocket and jet engines as well components of high specific strength systems. Additionally, their catalytic properties may find an application in catalytic converters, air purification systems from chemical and biological toxic agents or in a hydrogen “production” by a decomposition of hydrocarbons.

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“…The selectivity in terms of H 2 /CO molar ratio was within the range 0.85-1.0 (at 630-650°C). It has been found [79] that supported Pt catalysts (without Ni) did not show any activity in DRM but even small amount (less than 1 wt %) mark edly enhances the catalytic performance.…”

Section: Pt/ni 3 Al Catalystmentioning

confidence: 99%

SHS-produced catalysts for in-situ generation of syngas in combustion chambers of heat engines: A review

Xanthopoulou

Knysh

Amosov

2015

Int. J Self-Propag. High-Temp. Synth.

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Harmful emissions from internal combustion engines and gas turbines can be markedly lowered upon addition of synthesis gas to hydrocarbon fuels such as natural gas. It has been suggested to perform the reactions of partial oxidation of methane as well as of dry and steam carbon dioxide reforming of methane in order to generate syngas directly in the combustion chamber of aircraft or car engines. In this communication we attempted to classify and characterize the SHS produced catalysts that were suggested for the purpose. High activity of such catalysts was associated with a highly deficient structure of combustion products formed in specific conditions of SHS reactions.

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Pt-implanted intermetallides as the catalysts for CH4–CO2 reforming

Cited by 13 publications

References 44 publications

The Key Points of Highly Stable Catalysts for Methane Reforming with Carbon Dioxide

The Key Points of Highly Stable Catalysts for Methane Reforming with Carbon Dioxide

Applications of Ni3Al Based Intermetallic Alloys—Current Stage and Potential Perceptivities

SHS-produced catalysts for in-situ generation of syngas in combustion chambers of heat engines: A review

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