Speciation and capture performance of mercury by a hybrid filter in a coal-fired power plant

Jin Ho Sung, Seung Ki Back, Bup Mook Jung, Youn Suk Kang, Chul Gyu Lee, Ha Na Jang, Yong Chil Seo

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Mercury speciation and removal were investigated for a newly developed hybrid filter (HF) originally designed to remove fine particulates and retrofitted to the exhaust cleaning system in a coal-fired power plant. The test plant used a blend of anthracite and semi-anthracite coals for combustion. At the boiler outlet, Hg0 was the dominant mercury species in the flue gas at 89% of total Hg. After passing through the electrostatic precipitator (ESP) and HF, Hg2 + became the dominant species owing to oxidation of Hg at the lower temperature and interaction with other air pollutants in the flue gas. The Hg2 + subsequently accumulated as Hgp by bonding with fly ash. Due to higher oxidation of Hg in the HF than in the ESP, more Hg2 + could be removed by the flue gas desulfurization (FGD) system through dissolution of Hg2 + when an HF was included. By installing hybrid filters alongside the existing devices, removal efficiencies of 86.7% and 99.3% for Hg and fine particulates, respectively, could be achieved, as opposed to 62.4% and 95.2% without the installation. Applying HFs in the existing air pollution control device (APCD) configuration was therefore recommended as the best simultaneous control technology for Hg and fine particulate matter (PM) at the test plant.

Original languageEnglish
Pages (from-to)35-40
Number of pages6
JournalInternational Journal of Coal Geology
Volume170
DOIs
Publication statusPublished - 2017 Feb 1

Fingerprint

coal-fired power plant
Flue gases
Power plants
Electrostatic precipitators
Anthracite
Coal
filter
anthracite
Oxidation
Air pollution control
Desulfurization
Fly ash
Boilers
Cleaning
Dissolution
oxidation
pollution control
fly ash
particulate matter
Air

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Geology
  • Economic Geology
  • Stratigraphy

Cite this

Sung, Jin Ho ; Back, Seung Ki ; Jung, Bup Mook ; Kang, Youn Suk ; Lee, Chul Gyu ; Jang, Ha Na ; Seo, Yong Chil. / Speciation and capture performance of mercury by a hybrid filter in a coal-fired power plant. In: International Journal of Coal Geology. 2017 ; Vol. 170. pp. 35-40.
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Speciation and capture performance of mercury by a hybrid filter in a coal-fired power plant. / Sung, Jin Ho; Back, Seung Ki; Jung, Bup Mook; Kang, Youn Suk; Lee, Chul Gyu; Jang, Ha Na; Seo, Yong Chil.

In: International Journal of Coal Geology, Vol. 170, 01.02.2017, p. 35-40.

Research output: Contribution to journalArticle

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