Removal of Elemental Mercury by Activated Carbon Saturated with KI

摘要

The purpose of this study is to develop high effective sorbent for capturing gaseous Hg~0. TKI-modified activated carbon (KI-AC) was prepared to determine its ability to remove elemental mercury on a fixed-bed reactor. The activated carbon with the highest activity for Hg~0 removal was screened. It was then impregnated by KI and showed high activity for mercury removal in simulated flue gas at 120 °C. The 1% KI-AC was the optimal adsorbent during Hg~0 removal. In addition, the effects of KI loading value on Hg~0 removal were evaluated. The Brunauer-Emmett-Teller (BET) method was employed to characterize the samples. As the results of the BET indicated, chemical characteristics of activated carbon were the main reasons responsible for the Hg~0 removal.