Carbon conversion in an atmospheric-pressure entrained coal gasifier |
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Affiliation: | 1. Photonics Laboratory, Physics Unit, Tampere University, Tampere, Finland;2. Department of Space Earth and Environment, Chalmers University of Technology, Sweden;3. Department of Chemical Engineering, University of Utah, Salt Lake City, UT, United States |
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Abstract: | Entrained gasification tests with a Utah high-volatile bituminous coal were performed at atmospheric pressure to assess the influence of particle size, coal feed rate, steam-coal ratio and oxygen-coal ratio. Independent argon-carbon balance and ash balance methods were used to evaluate carbon conversion, with good agreement observed between the methods. A higher O2-coal ratio and finer particles increased the carbon conversion. Carbon conversion and hydrogen formation showed little dependence on the amount of steam injected in the secondary stream, indicating minimal steam-coal reaction. When the coal feed rate was varied from 23 to 27 kg h−1, a small increase in carbon conversion was observed with no significant change in the gas composition. |
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