TITLE

Oxidation of Elemental Mercury by Active Species Generated From a Surface Dielectric Barrier Discharge Plasma Reactor

AUTHOR(S)
An, Jiu; Shang, Ke; Lu, Na; Jiang, Yu; Wang, Tie; Li, Jie; Wu, Yan
PUB. DATE
January 2014
SOURCE
Plasma Chemistry & Plasma Processing;Jan2014, Vol. 34 Issue 1, p217
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A surface dielectric barrier discharge plasma reactor was employed to study Hg oxidation in coal-fired flue gas. The experimental results showed that 98 % of Hg oxidation efficiency and 13.7 μg kJ of energy yield were obtained under a specific energy density (SED) of 7.9 J L. Increasing SED was beneficial for Hg oxidation due to higher production of active species. Higher initial concentration resulted in lower Hg oxidation efficiency, but higher amount of Hg oxidation. Water vapor inhibited Hg oxidation because the generation of O was suppressed. The presence of NO remarkably restrained Hg oxidation, while SO showed little effect on Hg oxidation. Roles of active species in Hg oxidation were examined under different gas atmospheres (O and air), indicating that O played an important role in Hg oxidation. Deposits on the internal surface of the reactor were analyzed by energy dispersive spectroscopy and the product was identified as HgO.
ACCESSION #
93434912

 

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