Reasons for the formation of sulfur in ammonia-based desulfurization

2017-12-27View Original

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This post was last edited by Yanzhi Youli on 2017-12-28 at 14:54. In the ammonia-based desulfurization process for sulfuric acid exhaust gases, yellow solid particles are present in the desulfurization solution; these are generally considered to be catalyst dust, but in fact they are sulfur produced as a side reaction. 2NH4HSO3 + (NH4)2SO3 = 2(NH4)2SO4 + S + H2O. At room temperature and with low concentrations, side reactions are not significant, and no sulfur is produced ； When the temperature rises above 50 degrees and the density of the desulfurization solution exceeds 1.25, side reactions result in the formation of sulfur. Thiosulfate an will also be formed in the solution: (NH4)2SO3 + S → (NH4)2S2O3

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Reasons for the formation of sulfur in ammonia-based desulfurization

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