High mercury emission (both forms: Hg0 and Hg2+) from the wet scrubber in a full-scale lignite-fired power plant

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/68407700:21220/20:00340355 RIV/61989100:27650/20:10244928 RIV/61989100:27730/20:10244928

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

High mercury emission (both forms: Hg0 and Hg2+) from the wet scrubber in a full-scale lignite-fired power plant

Popis výsledku v původním jazyce

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 &quot;complex&quot; mercury behaviour. (C) 2020 The Authors

Název v anglickém jazyce

High mercury emission (both forms: Hg0 and Hg2+) from the wet scrubber in a full-scale lignite-fired power plant

Popis výsledku anglicky

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 &quot;complex&quot; mercury behaviour. (C) 2020 The Authors

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20700 - Environmental engineering

Projekt

<a href="/cs/project/TK01020101" target="_blank" >TK01020101: Snížení koncentrací Hg, HCl a HF z velkých průmyslových zdrojů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Fuel

ISSN

0016-2361

e-ISSN

—

Svazek periodika

270

Číslo periodika v rámci svazku

Volume 270

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000520029100036

EID výsledku v databázi Scopus

2-s2.0-85081229671