Abstract
Gasification is a high-temperature/high-pressure process that converts carbonaceous materials such as coal and/or petcoke into CO and H2, feedstock materials used in power generation and chemical production. Gasification is considered an important technology because of its high process efficiency and the ability to capture environmental pollutants such as CO2, SO3 and Hg. Ash impurities in the carbon feedstock materials melt and coalesce during gasification (1325-1575 °C), becoming slag that attaches to and flows down the gasifier sidewall, corroding and eroding the high Cr2O3 refractory liner used to protect the gasification chamber. Phosphate additions to high Cr2O3 refractory have been found to alter slag/refractory interactions and dramatically reduce refractory wear by the following mechanisms: a) spinel formation, b) slag chemistry changes, c) two phase liquid formation, and d) oxidation state changes. The mechanisms and how they work together to impact material wear/corrosion will be discussed.
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© 2016 TMS (The Minerals, Metals & Materials Society)
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Bennett, J., Nakano, A., Nakano, J., Thomas, H. (2016). Gasification Slag and the Mechanisms by Which Phosphorous Additions Reduce Slag Wear and Corrosion in High Cr2O3 Refractories. In: Reddy, R.G., Chaubal, P., Pistorius, P.C., Pal, U. (eds) Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016. Springer, Cham. https://doi.org/10.1007/978-3-319-48769-4_118
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DOI: https://doi.org/10.1007/978-3-319-48769-4_118
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48625-3
Online ISBN: 978-3-319-48769-4
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