The oxidation of cobalt in air from room temperature to 467�C

Tompkins, Harland G.; Augis, J. A.

doi:10.1007/bf00611349

Cited by 69 publications

(50 citation statements)

References 11 publications

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“…In addition, the catalyst prepared by the rising-pH method showed a larger increment of the weight gain peak compared to the catalyst prepared by the impregnation method. Tompkins and Augis [19] reported that the oxidation of metallic Co to CoO and Co3O4 occurred at a temperature of 425 °C. This suggests that overlapping weight gain as determined by the TGA-TPO analysis occurred between both nickel and cobalt particles for the reacted Ni-Co-Al2O3 catalyst prepared by the rising-pH method from the dry reforming of simulated waste plastics (SWP), hence a higher weight gain peak.…”

Section: Effect Of Catalyst Preparation Methodsmentioning

confidence: 99%

Pyrolysis-catalytic dry (CO 2 ) reforming of waste plastics for syngas production: Influence of process parameters

Saad

Williams

2017

Fuel

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Abstract:Catalytic dry (CO2) reforming of waste plastics was carried out in a two stage, pyrolysis-catalytic reforming fixed bed reactor to optimise the production of syngas (H2 + CO). The effects of changing the process parameters of, catalyst preparation conditions, catalyst temperature, CO2 input rate and catalyst:plastic ratio were investigated. The plastics used was a mixture of plastics simulating that found in municipal solid waste and the catalyst used was Ni-Co-Al2O3. The results showed that changing each of the process conditions investigated, all significantly influenced syngas production. An increase of 17 % of syngas production was achieved from the experiment with the catalyst prepared by rising-pH technique compared to preparation via the impregnation method. The optimum syngas production of 148.6 mmolsyngas g -1 swp was attained at the catalytic dry reforming temperature of 800 °C and catalyst:plastic ratio of 0.5. The increase of CO2 input rate promoted a higher yield of syngas.

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Section: Effect Of Catalyst Preparation Methodsmentioning

confidence: 99%

Pyrolysis-catalytic dry (CO 2 ) reforming of waste plastics for syngas production: Influence of process parameters

Saad

Williams

2017

Fuel

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“…Subsequently, the optical transmission of the multilayer system was could be calculated using the Fresnel approximation. In our calculations we assumed that the oxide of Co is CoO [34], and therefore, a best fit to the transmission signal based on changing the amount of oxide could be generated Due to the unavailability of the oxide data of Co in the visible range, we assumed the dielectric function of the oxide as 2 + 0.01i, and independent of the wavelength for simplicity.…”

Section: Methodsmentioning

confidence: 99%

Localized surface plasmon sensing based investigation of nanoscale metal oxidation kinetics

et al. 2015

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The localized surface plasmon resonance (LSPR) of nanoparticles can be a powerful and sensitive probe of chemical changes in nanoscale volumes. Here we have used the LSPR of silver (Ag) to study the oxidation kinetics of nanoscopic volumes of cobalt (Co) metal. Bimetal nanoparticles of the immiscible Co-Ag system prepared by pulsed laser dewetting were aged in ambient air and the resulting changes to the LSPR signal and bandwidth were used to probe the oxidation kinetics. Co was found to preferentially oxidize first. This resulted in a significant enhancement by a factor of 8 or more in the lifetime of stable Ag plasmons over that of pure Ag. Theoretical modeling based on optical mean field approximation was able to predict the oxidation lifetimes and could help design stable Ag-based plasmonic nanoparticles for sensing applications.

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“…The oxide scales thickness of pure Co in previous literature are 775 nm (temperature 500°C, time 20 min, P(O 2 )/P h = 0.1) [27], 440 nm (467°C, 20 min, P(O 2 )/P h = 0.21) [28], 360 nm (505°C, 19 min, P(O 2 )/P h = 1) [29] and 500 nm (500°C, 15 min, P(O 2 )/ P h = 0.21) [30], respectively. Compared the results in this paper with the previous ones, they are of the same order of magnitude.…”

Section: Resultsmentioning

confidence: 99%

The selective oxidation behaviour of WC–Co cemented carbides during the early oxidation stage

Chen

Wang

et al. 2015

Corrosion Science

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The oxidation of cobalt in air from room temperature to 467�C

Cited by 69 publications

References 11 publications

Pyrolysis-catalytic dry (CO 2 ) reforming of waste plastics for syngas production: Influence of process parameters

Pyrolysis-catalytic dry (CO 2 ) reforming of waste plastics for syngas production: Influence of process parameters

Localized surface plasmon sensing based investigation of nanoscale metal oxidation kinetics

The selective oxidation behaviour of WC–Co cemented carbides during the early oxidation stage

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