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Energy Sources, Part A: Recovery, Utilization, and Environmental Effects Volume 34, 2012 - Issue 11
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Original Articles

The Removal of Elemental Mercury by Potassium Permanganate-modified Rice Husk Ash Sorbents

P. F. Zhao School of Electric Power and Engineering, China University of Mining and Technology, Xuzhou, China
,
X. Guo State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, China
&
C. G. Zheng State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, China
Pages 994-1003 | Received 17 Jan 2010, Accepted 27 Feb 2010, Published online: 24 Apr 2012
 
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Abstract

The elemental mercury (Hg0) capture of potassium permanganate (KMnO4)-modified calcium-based with rice husk ash sorbent (CaO/RHA) was first tested to evaluate the effectiveness of Hg0 adsorption. The KMnO4 modified CaO/RHA performances were compared with that of modified Ca-based with fly ash sorbent (CaO/FA). The effects of supports, pore size distribution, oxidants loading, temperature, and gas mixture were also investigated to understand the mechanism in capturing Hg0. The CaO/RHA/KMnO4 sorbent could remove over 90% of Hg0 under the simulated flue gas.

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