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The Scientific World Journal
Volume 2014, Article ID 260141, 7 pages
Research Article

Characteristics and Stability of Mercury Vapor Adsorption over Two Kinds of Modified Semicoke

College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong Province 266510, China

Received 20 June 2014; Accepted 5 August 2014; Published 27 August 2014

Academic Editor: Wenjun Jiang

Copyright © 2014 Zhang Huawei et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In an attempt to produce effective and lower price gaseous Hg0 adsorbents, two methods of HCl and KMnO4/heat treatment were used respectively for the surface modification of liginite semicoke from inner Mongolia. The different effects of modification process on the surface physical and chemical properties were analyzed. The characteristics and stability of mercury vapor adsorption over two kinds of modified semicoke were investigated. The results indicated that modification process caused lower micropore quantity and volume capacity of semicoke; the C-Cl functional groups, C=O bond and delocalized electron π on the surface of Cl-SC, the amorphous higher valency , and O=C–OH functional groups on the surface of Mn-H-SC were the active sites for oxidation and adsorption of gaseous Hg0. Modification process led to higher mercury removal efficiency of semicoke at 140°C and reduced the stability of adsorbed mercury of semicoke in simulated water circumstance simultaneously.