Analysis on Reaction and Sulfur Released Characteristics During Coal Coke Gasification

A research on the gasification reaction characteristics and the sulfur released characteristics during the gasification of three different coal cokes from Hejin,Yitai and Lingshi regions with CO2 and steam as conducted.Measurements and analysis on the two main sulfurous products(H2S and COS) released from the gasified sulfur were conducted.The results showed that in the CO2 and steam gas,the gasification reaction degree of the three coal cokes from high to low would be the Yitai coal coke,Linshi coal coke and Hejin coal coke.With the gasification temperature increased,the gasification reaction of the high coal coke would be increased.Meanwhile,due to the steam gas reaction produced more activities than CO2 gas gasification,thus the steam gasification reaction of the coal coke would be higher than the CO2 gasification reaction.During the CO2 gasification process,due to more CO produced,the sulfur in the coal coke mostly would be released with a form of COS into air and there would be no H2S produced.While in the steam gasification process,the sulfur in the coal coke would be released with a form of H2S into air and there was no COS produced.The reasons probably were that under the reducer existed condition,the different form sulfurs in the coal coke all could be reduced to H2S.