High mercury emission (both forms: Hg0 and Hg2+) from the wet scrubber in a full-scale lignite-fired power plant
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F20%3A10244928" target="_blank" >RIV/61989100:27230/20:10244928 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21220/20:00340355 RIV/61989100:27650/20:10244928 RIV/61989100:27730/20:10244928
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0016236120304865?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0016236120304865?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.fuel.2020.117491" target="_blank" >10.1016/j.fuel.2020.117491</a>
Alternative languages
Result language
angličtina
Original language name
High mercury emission (both forms: Hg0 and Hg2+) from the wet scrubber in a full-scale lignite-fired power plant
Original language description
The paper describes and discusses the results of research on mercury behaviour, especially its high emission, in both forms: elemental (Hg0) and oxidised (Hg2+), from the wet flue gas desulphurisation scrubber (WFGD) in a lignite-fired power plant located in central Europe. The presented results involve the collection of lignite power plant samples (liquid, solid, gas) and different laboratory chemical analyses to try to understand the mechanism of mercury re-emission from the wet flue gas desulfurization system. It was noted that 67-80% of the total inlet mercury concentration left the WFGD scrubber. Moreover, the oxidised form of mercury was the main emitted form (about 60-70% of the total mercury concentration). The results show that mercury was found in very high concentration (10 μg/g) (range: ppm) in the WFGD solid by-products, whereas the liquid phase contained only 1 μg//l (range: ppb). Considering literature reports and presented data from the investigated power station, we believe that iron (Fe), which occurs in very high concentrations in solid WFGD samples (1.81% wt. Fe) and lignite (up to 20 g/kg Fe) is mainly responsible for disrupting the mercury absorption in the scrubber, the partitioning of the mercury between phases and leads to its reemission. Moreover, we believe also that a relatively high iodine ion concentration (130 mg/l) in the limestone slurry leads to mercury emission in its oxidised form, mainly as HgI2, which is highly volatile. Other minor components from limestone dissolution such as Mn, Al and Mg may additionally enhance that "complex" mercury behaviour. (C) 2020 The Authors
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20700 - Environmental engineering
Result continuities
Project
<a href="/en/project/TK01020101" target="_blank" >TK01020101: Reduction of Hg, HCl and HF concentrations from large industrial sources</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Fuel
ISSN
0016-2361
e-ISSN
—
Volume of the periodical
270
Issue of the periodical within the volume
Volume 270
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
—
UT code for WoS article
000520029100036
EID of the result in the Scopus database
2-s2.0-85081229671