Rai, Subash (2019). Role of sulphur on carbon deposition on AGR fuel cladding steel. University of Birmingham. Ph.D.
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Rai19PhD.pdf
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Abstract
Filamentary carbon deposition on 20Cr/25Ni/Nb austenitic stainless steel from 1000–5000 ppm C2H4 in 1%CO/ bal. CO2 at 600°C has been investigated. This filamentary carbon deposition is catalysed by metallic nickel-rich particles formed intrinsically from the alloy during the early stages of oxidation. Samples were analysed using electron microscopy techniques. A simple model has been proposed to explain the formation of nickel-rich particles within the subsurface oxide layer. Furthermore, in this project the effect of COS, H2S and CH3SH on carbon deposition were examined. Addition of sulphur species suppressed the deposition process but the effect was dependent on the concentration of C2H4 and the sulphur species. This suppressing effect of sulphur on carbon deposition was explained in term of the role played by the adsorbed sulphur in reducing the rate of the key steps of the growth process of a filament.
| Type of Work: | Thesis (Doctorates > Ph.D.) | |||||||||
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| Award Type: | Doctorates > Ph.D. | |||||||||
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| Licence: | All rights reserved | |||||||||
| College/Faculty: | Colleges (2008 onwards) > College of Engineering & Physical Sciences | |||||||||
| School or Department: | School of Metallurgy and Materials | |||||||||
| Funders: | Engineering and Physical Sciences Research Council | |||||||||
| Subjects: | T Technology > TN Mining engineering. Metallurgy | |||||||||
| URI: | http://etheses.bham.ac.uk/id/eprint/8882 |
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