Sequential Capture of Gaseous Hg0 in Flue Gas and Aqueous Hg2+ in Desulfurization Solution by Cu–ZnS: Mechanisms, Kinetics, and Its Application in Hg Recovery as a Supplement of Selective Catalytic Reduction + Wet Flue Gas Desulfurization
Abstract:The combined technology of selective catalytic reduction
and wet
flue gas desulfurization (SCR + WFGD) to control Hg0 emissions
from coal-fired flue gas is often unsatisfactory due to the undesired
Hg0 oxidation efficiency of SCR, the re-emission of Hg0 from WFGD, and the potential secondary pollution. To offset
the shortcomings of SCR + WFGD, Cu–ZnS that resulted from Cu2+ activation of natural sphalerite was developed as a difunctional
sorbent to sequentially capture gaseous Hg0 in flue gas
and aqueous Hg2+ … Show more
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