Speciation and mass distribution of mercury in a solid refuse fuels power plant

Eun Song Lee, Sang Yeop Lee, Soo Jin Cho, Yong Chil Seo, Seong Heon Kim, Ha Na Jang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The behavior of mercury (Hg) species during thermal cogeneration was analyzed in a 10 MWh solid refuse fuel (SRF) utility boiler using a selective non-catalytic reduction unit, semi-dry reactor, and fabric filter with activated carbon injection for air pollution control from the facility. The annual Hg inflow into this facility is 24.2 (from 9.2 to 33.3) kg. The Hg species in flue-gas at inlet and outlet of the air pollution control devices (APCDs) were observed to be a mixture of 14.4 µg-Hg/Sm3 of particulate mercury, 2.6 µg-Hg/Sm3 of oxidized mercury, and 15.6 µg-Hg/Sm3 of elemental mercury and another mixture of 0.0 of particulate mercury, 0.3 of oxidized mercury, and 11.0 of elemental mercury, respectively. Elemental mercury was the major component in the combustion residue. In the emission assessment, the mass distribution of Hg of fly ash, bottom ash, and stack emission was determined as 67% (16.2 kg/yr), 2.0% (0.47 kg/yr) and 31% (7.5 kg/yr), respectively. Although elemental mercury was captured by APCDs configuration, it is best to chemically capture the air-emission mercury. Evaluation of Hg stability was tested for the fly ash by sequential extraction procedure method.

Original languageEnglish
Pages (from-to)2461-2467
Number of pages7
JournalKorean Journal of Chemical Engineering
Volume38
Issue number12
DOIs
Publication statusPublished - 2021 Dec

Bibliographical note

Publisher Copyright:
© 2021, The Korean Institute of Chemical Engineers.

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering

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