Removal of elemental mercury and divalent mercury with ammonium sulfide in smelting gas containing SO2

Xueqian Wang, Jianlin Xiong, Langlang Wang, Shudi Yan
2016 Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering   unpublished
A set of simulation equipment is set up after the conditions of removing SO 2 and heavy metal Hg (Hg 0 and Hg 2+ ) has been investigated, the results of the removal technology method of absorption Hg 0 , Hg 2+ in smelting gases containing SO 2 with (NH 4 ) 2 S is tested, and their composition of reaction products and sediment are analyzed with XRD and XPS. Obtained that: when absorption concentration of (NH 4 ) 2 S are 0.8 mol/L, in pH 7.0-3.0 removal efficiency of Hg 0 and SO 2 is higher,
more » ... O 2 is higher, temperature will affect the absorption of Hg 0 , when reaction temperature is 30˚C the absorption of Hg 0 can be achieved the best. Under these optimum conditions, the removal efficiency of Hg 0, Hg 2+ and SO 2 could reach 89.45%, 99.42% and over 99.99%, the participation of SO 2 has a promote consequence on removal of Hg 0 . The main reaction product is HgS, HgSO 4 , (NH 4 ) 2 S 2 O 3 .
doi:10.2991/icseee-15.2016.68 fatcat:4dllxnq4xnc4fpqseivu5q6txe