Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6637310 | Fuel | 2014 | 7 Pages |
Abstract
In this paper, elemental mercury (Hg0) re-emissions from simulated wet flue gas desulfurization (WFGD) solutions were evaluated in the presence of thiocyanate ions (SCNâ) or sulfide ions (S2â and HSâ). Experimental results revealed that both thiocyanate ions and sulfide ions could inhibit the reduction of oxidized mercury to Hg0. The inhibition effect of SCNâ was mainly attributed to the formation of HgSO3SCNâ and HgSCNXâ(X-2) (XÂ =Â 2-4). It was found that the mercury reduction process in the presence of sulfide ions followed different mechanism under acidic or alkaline condition, though the formation of stable HgS could be ascribed to the main inhibition reason. Under acidic condition, the bivalent mercury ions may not directly combine with sulfide ions to form HgS. This had led to a weaker inhibition effect under the acidic condition compared to that under alkaline condition.
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Chemical Engineering
Chemical Engineering (General)
Authors
Qingfeng Wang, Yue Liu, Zhenmei Yang, Haiqiang Wang, Xiaole Weng, Yuejun Wang, Zhongbiao Wu,