Abstract
The release behavior of sulfur during coal gasification was studied in a bench-scale self-heated circulating fluidized bed gasifier. With the increase of the O2/C molar ratio, gasification temperature increases, which promotes sulfur release rate and the formation of H2S. The conversion reaction between H2S and COS is far from equilibrium and the yield of COS is excessive. Under the same molar ratio of O2/C, the increase of coal feeding rate can elevate the gasification temperature, promote the release of sulfur and the transformation of gaseous sulfur to H2S.
Highlights
Coal is the most abundant fossil fuel reserves in China
The impurities in coal gas reduces the quality of coal gas, and gaseous sulfur is one of the common pollutants, which will pollute the environment and corrode the equipment downstream[1, 2]
Few researches published are about sulfur release in the process of fluidized bed gasification, and fewer experimental results published are based on the self-heated circulating fluidized bed experimental platform, which is closed to the commercial circulating fluidized bed
Summary
Coal is the most abundant fossil fuel reserves in China. The emergence of clean coal technology navigates the direction for the further development of coal utilization. Especially circulating fluidized bed gasification technology, is one of the promising technologies. The impurities in coal gas reduces the quality of coal gas, and gaseous sulfur is one of the common pollutants, which will pollute the environment and corrode the equipment downstream[1, 2]. Reducing the yield of gaseous sulfur is necessary, while clearing the release behavior of gaseous sulfur is primary. Few researches published are about sulfur release in the process of fluidized bed gasification, and fewer experimental results published are based on the self-heated circulating fluidized bed experimental platform, which is closed to the commercial circulating fluidized bed
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