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- W2078760209 abstract "In this paper, a two-step desulfurization process for high-sulfur coal was investigated. Two Chinese coals with the addition of 10 wt % potassium hydroxide or sodium hydroxide were pyrolyzed under an atmosphere of nitrogen or hydrogen in a fixed-bed reactor at 600 °C, and then the obtained chars were washed with hot water. The results indicated that, without the addition of an alkali component, the sulfur removal of these two coals by pyrolysis and hydropyrolysis is ∼40%−50% and the sulfur content of chars is reduced only slightly, in comparison with the original coals; with the addition of 10 wt % potassium hydroxide or sodium hydroxide into the original coals and the chars being washed with hot water, the sulfur removal is ∼70%−80% and the sulfur content in chars is reduced dramatically. The combustion behavior of chars was also investigated, using thermogravimetric analysis. The results showed that those chars that had an added alkali component and were subjected to water-washing were more reactive and can be burned more easily than those without added alkali, which was also confirmed by a kinetics analysis of char combustion." @default.
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- W2078760209 date "2005-04-23" @default.
- W2078760209 modified "2023-10-16" @default.
- W2078760209 title "Desulfurization of Coal by Pyrolysis and Hydropyrolysis with Addition of KOH/NaOH" @default.
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- W2078760209 doi "https://doi.org/10.1021/ef0497053" @default.
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