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Citation: WANG Li, CHEN Ji-tao, ZHANG Hua-wei, LI Min, ZHANG Lin-lin, LIU Shan-shan. Adsorption performance of semi-coke modified by KMnO4 solution for gas-phase Hg0 in flue gas[J]. Journal of Fuel Chemistry and Technology, ;2012, 40(12): 1498-1504. shu

Adsorption performance of semi-coke modified by KMnO4 solution for gas-phase Hg0 in flue gas

  • 1.

    College of Chemical and Environmental Engineering,Shandong University of Science and Technology, Qingdao 266590, China

  • Corresponding author: CHEN Ji-tao, 
  • Received Date: 20 April 2012
    Available Online: 2 July 2012

    Fund Project: 青岛市科技计划(08-2-l-16-nsh-3) (08-2-l-16-nsh-3) 山东科技大学研究生科技创新基金(YCA110362)。 (YCA110362)

  • In an attempt to develop a novel and more effective sorbent with low-cost for the removal of gas-phase Hg0 from flue gas, the adsorption performance of semi-coke and KMnO4 solution-modified semi-coke for gas-phase Hg0 was investigated with a bench-scale fixed-bed reactor system. The experimental results suggest that the adsorption performance of semi-coke is good at low temperature but weak at higher temperature. The semi-cokes impregnated by KMnO4 solution have excellent adsorption performance for gas-phase Hg0 at 140 ℃, and can be further enhanced by heating the impregnated samples at 250 ℃. The BET analysis shows that the semi-coke has rich micro-pores but become poor after modification. The XPS results indicates that the adsorbed mercury on the surface of the modified semi-coke samples mainly exists in oxidation state (Hg2+) and these compounds (KMnO4, K2MnO4 and MnO2 ) play a key role in the oxidation reaction of gas-phase Hg0.
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