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The Xiaolongtan coal with different blend ratios (ash/coal) of ash was pyrolyzed in a fixed bed reactor to study sulfur transformation during the pyrolysis of the mixture of coal and coal ash. The addition of coal ash inhibited H2S evolution at low temperatures, and this was because H2S was captured by Fe2O3 of the coal ash. However, the coal ash promoted H2S evolution at high temperatures, which...
Coal with different proportions of CaSO4 was pyrolyzed in a fixed-bed reactor in a temperature range of 500–800°C to study the mechanism of CaSO4 decomposition during coal pyrolysis. The results showed that the presence of coal could greatly promote CaSO4 decomposition at high temperatures, and 87% CaSO4 was decomposed at 800°C during Xiaolongtan lignite pyrolysis, which was mainly attributed to the...
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