Carbon gasification from Fe–Ni catalysts after methane dry reforming

Theofanidis, Stavros Alexandros; Batchu, Rakesh; Galvita, Vladimir; Poelman, Hilde; Marin, Guy

doi:10.1016/j.apcatb.2015.12.006

Cited by 189 publications

(100 citation statements)

References 59 publications

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“…S3 and S4 show the TEM images of the spent catalyst (after DRM reaction). Neither obvious filamentous carbon nor the encapsulating carbon [37,38] was observed.…”

Section: Catalytic Performancementioning

confidence: 95%

The influence of reduction temperature on the performance of ZrOx/Ni-MnOx/SiO2 catalyst for low-temperature CO2 reforming of methane

Wang

Shi

et al. 2017

Catalysis Today

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“…S3 and S4 show the TEM images of the spent catalyst (after DRM reaction). Neither obvious filamentous carbon nor the encapsulating carbon [37,38] was observed.…”

Section: Catalytic Performancementioning

confidence: 95%

The influence of reduction temperature on the performance of ZrOx/Ni-MnOx/SiO2 catalyst for low-temperature CO2 reforming of methane

Wang

Shi

et al. 2017

Catalysis Today

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“…Figure 2(a) illustrates the TGA-TPO and the derivative rate of weight loss in relation to temperature programmed oxidation (DTG-TPO) results of the carbon on the used 10% Ni/Al2O3 catalyst. It has been suggested that the weight loss at oxidation temperatures higher than 600 °C indicates the oxidation of filamentous carbon and the weight loss that occurs at <600 °C can be attributed to the oxidation of amorphous or disordered carbon which are more easily oxidised [33][34][35][36][37]. It should also be noted that oxidation at the higher temperature might also include graphitic carbon that is not in the form of filaments, such as graphitic carbons which might encapsulate the nickel particles [34].…”

Section: H2o + Co = H2 + Co2 Equationmentioning

confidence: 99%

“…Raman spectroscopy is commonly used to identify the quality or graphitic nature of carbons based on the intensity of D and G bands [35,42,43]. The D band in the Raman shift indicates amorphous or disordered carbon and the G band indicates graphitic or filamentous carbon.…”

Section: H2o + Co = H2 + Co2 Equationmentioning

confidence: 99%

Carbon nanotubes and hydrogen production from the pyrolysis catalysis or catalytic-steam reforming of waste tyres

Zhang

Williams

2016

Journal of Analytical and Applied Pyrolysis

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A range of process conditions have been investigated to maximise the production of carbon nanotubes (CNTs) and/or hydrogen from waste tyres. A two-stage pyrolysis-catalytic reactor system was used and the influence of catalyst temperature (700, 800 and 900 °C), tyre: catalyst ratio (1:0.5, 1:1 and 1:2) and steam input (water injection 0, 2 and 5 ml h -1 ) to the second catalyst stage were investigated. The catalyst used was a Ni/Al2O3 catalyst prepared by a wetness impregnation technique. Carbon was deposited on the catalyst surface during pyrolysis-catalysis increasing with increasing catalyst temperature and also increasing as the tyre: catalyst ratio was raised. Examination of the carbon showed it to be composed of largely filamentous type carbons, producing 253.7 mg g -1 tyre of filamentous carbons at a tyre: catalyst ratio of 1:1 and catalyst temperature of 900 °C. A significant proportion of the deposited filamentous carbons were multi-walled carbon nanotubes as shown by transmission electron microscopy characterisation. The introduction of steam to the process enhanced hydrogen production, producing a maximum of 34.69 mmol g -1 tyre at a water injection rate of 5 ml h -1 .4

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“…For instance, TAP has been used to quantify the number of active sites present on catalysts, 36 and these were found to be in agreement with previously published steady-state isotopic transient kinetic analysis diffuse reflectance infrared Fourier transform spectroscopy (SSITKA DRIFTS) results. 43 Other examples of correlation/complementation of TAP experiments with other methods include electron paramagnetic resonance (EPR) spectroscopy, 44,45 X-ray photoelectron spectroscopy (XPS), 44,46,47 X-ray diffraction (XRD), 44,46,48 X-ray absorption spectroscopy (XAS), 44,47 Raman, 46 energy dispersive X-ray scanning transmission electron microscopy (EDX-STEM), 46 high angle annular dark field scanning transmission electron microscopy (HAADF-STEM), 48,49 Fourier transfer Infrared (FTIR), 49 high resolution scanning transmission electron microscopy (HRTEM) 47,50,51 and prompt gamma-ray activation analysis (PGAA). 52 As such, while many reports have been dedicated solely to TAP, it should be noted that TAP is not a necessarily standalone characterization technique and can/should be used in a complimentary way with other methodologies.…”

Section: The Relevance Of Tap Experimentsmentioning

confidence: 99%

Forty years of temporal analysis of products

Morgan

Maguire

Fushimi

et al. 2017

Catal. Sci. Technol.

131

101

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A detailed understanding of reaction mechanisms and kinetics is required in order to develop and optimize catalysts and catalytic processes. While steady-state investigations are known to give a global view of the catalytic system, transient studies are invaluable since they can provide more comprehensive insight into elementary steps. For almost forty years temporal analysis of products (TAP) has been successfully utilized for transient studies of gas phase heterogeneous reactions, and there have been a number of advances in instrumentation and numerical modeling methods in that time. Since TAP is a complex methodology it is often viewed as a niche specialty. With the purpose to make TAP more relevant and approachable to a wider segment of the catalytic research community, part of the intention of this work is to highlight the significant contributions TAP has made to elucidating mechanistic and kinetic aspects of complex, multistep heterogeneous reactions. With this in mind, an outlook is also disclosed for the technique in terms of what is needed to revitalize the field and make it more applicable to the recent advances in catalyst characterization (e.g. operando modes).

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Carbon gasification from Fe–Ni catalysts after methane dry reforming

Cited by 189 publications

References 59 publications

The influence of reduction temperature on the performance of ZrOx/Ni-MnOx/SiO2 catalyst for low-temperature CO2 reforming of methane

The influence of reduction temperature on the performance of ZrOx/Ni-MnOx/SiO2 catalyst for low-temperature CO2 reforming of methane

Carbon nanotubes and hydrogen production from the pyrolysis catalysis or catalytic-steam reforming of waste tyres

Forty years of temporal analysis of products

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