Thermodynamic possibilities of flue gas dry desulfurization, de-HCl, removal of mercury, and zinc compounds in a system with Na2CO3, Ca(OH)2, sulfur, and HBr addition.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F20%3A00519196" target="_blank" >RIV/67985858:_____/20:00519196 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/44555601:13520/19:43895273 RIV/60461373:22310/20:43918547 RIV/60461373:22320/20:43918547

Výsledek na webu

<a href="http://hdl.handle.net/11104/0305531" target="_blank" >http://hdl.handle.net/11104/0305531</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11696-019-00930-7" target="_blank" >10.1007/s11696-019-00930-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermodynamic possibilities of flue gas dry desulfurization, de-HCl, removal of mercury, and zinc compounds in a system with Na2CO3, Ca(OH)2, sulfur, and HBr addition.

Popis výsledku v původním jazyce

Dry methods of flue gas cleaning are usually based on calcium hydroxide or sodium bicarbonate (NaHCO3), which is in situ decomposed to active soda (Na2CO3). Together with acid gases also emissions of volatile heavy metals (e.g., mercury and some Zn-compounds) have to be reduced. Removal of both main forms of mercury (Hg0 and Hg2+) from the flue gas is dependent on chemical reactions and sorption processes at the temperatures below approx. 300 °C. In this theoretical study, attention was concentrated on the thermodynamics of gas–solid reactions (de-HCl and desulfurization), reactions of Hg/HgCl2 vapours and Zn-compounds, with soda and Ca(OH)2 in the presence of acid gases, and on effects of elemental sulfur and HBr addition. Influence of sorbents/additives and conditions (temperature, gas phase composition) on the equilibrium concentrations of gaseous and solid species was studied at temperatures 400–560 K (127–287 °C). Two types of alkaline solid sorbents have been theoretically analyzed: Na2CO3 and Ca(OH)2. The thermodynamic analyses involved systems with computations of gas/solid phase composition on a basis of assumption of solid phases with unit activities (stable, basic state). Application of the minimization of Gibbs energy for the chosen systems was used for the determination of equilibrium composition of gas and solid phases.

Název v anglickém jazyce

Thermodynamic possibilities of flue gas dry desulfurization, de-HCl, removal of mercury, and zinc compounds in a system with Na2CO3, Ca(OH)2, sulfur, and HBr addition.

Popis výsledku anglicky

Dry methods of flue gas cleaning are usually based on calcium hydroxide or sodium bicarbonate (NaHCO3), which is in situ decomposed to active soda (Na2CO3). Together with acid gases also emissions of volatile heavy metals (e.g., mercury and some Zn-compounds) have to be reduced. Removal of both main forms of mercury (Hg0 and Hg2+) from the flue gas is dependent on chemical reactions and sorption processes at the temperatures below approx. 300 °C. In this theoretical study, attention was concentrated on the thermodynamics of gas–solid reactions (de-HCl and desulfurization), reactions of Hg/HgCl2 vapours and Zn-compounds, with soda and Ca(OH)2 in the presence of acid gases, and on effects of elemental sulfur and HBr addition. Influence of sorbents/additives and conditions (temperature, gas phase composition) on the equilibrium concentrations of gaseous and solid species was studied at temperatures 400–560 K (127–287 °C). Two types of alkaline solid sorbents have been theoretically analyzed: Na2CO3 and Ca(OH)2. The thermodynamic analyses involved systems with computations of gas/solid phase composition on a basis of assumption of solid phases with unit activities (stable, basic state). Application of the minimization of Gibbs energy for the chosen systems was used for the determination of equilibrium composition of gas and solid phases.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Chemical Papers

ISSN

0366-6352

e-ISSN

—

Svazek periodika

74

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

951-962

Kód UT WoS článku

000520152200021

EID výsledku v databázi Scopus

2-s2.0-85074047526