Selective non catalytic reduction of NOx by ammonia - Effect of iron additives

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F18%3A10241419" target="_blank" >RIV/61989100:27710/18:10241419 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Selective non catalytic reduction of NOx by ammonia - Effect of iron additives

Popis výsledku v původním jazyce

Selective non catalytic reduction of NOx by ammonia (SNCR) represents relatively easy process for NOx emissions decrease. However, regarding to its relatively low efficiency, there is an effort to find the way, how to increase it. Accessible and cheap Fe additives (gray cast-iron and siderite) were tested for understanding their catalytic effect on the SNCR process at laboratory conditions, where no radicals formed during fuel combustion are present. The catalytic effect of iron additives was tested in the fix bed reactor with feed containing NO, NH3, O2 and water vapor. It was found out that Fe additives have inhibitory effect on the SNCR process, which can be explained by the ability of the formed Fe oxides to oxidize ammonia non-selectively into nitrogen and/or NOx. However, this negative effect of Fe additives on SNCR can be minimized by adjusting the temperature, oxygen amount in the feed gas, NH3/NOx ratio or ensuring pre-oxidation of the Fe materials by oxygen by their dosing into oxygen rich area or ensuring appropriate time delay between contact of additive with oxygen and NOx and ammonia. (C) 2018 Czech Environment Management Center. All rights reserved.

Název v anglickém jazyce

Selective non catalytic reduction of NOx by ammonia - Effect of iron additives

Popis výsledku anglicky

Selective non catalytic reduction of NOx by ammonia (SNCR) represents relatively easy process for NOx emissions decrease. However, regarding to its relatively low efficiency, there is an effort to find the way, how to increase it. Accessible and cheap Fe additives (gray cast-iron and siderite) were tested for understanding their catalytic effect on the SNCR process at laboratory conditions, where no radicals formed during fuel combustion are present. The catalytic effect of iron additives was tested in the fix bed reactor with feed containing NO, NH3, O2 and water vapor. It was found out that Fe additives have inhibitory effect on the SNCR process, which can be explained by the ability of the formed Fe oxides to oxidize ammonia non-selectively into nitrogen and/or NOx. However, this negative effect of Fe additives on SNCR can be minimized by adjusting the temperature, oxygen amount in the feed gas, NH3/NOx ratio or ensuring pre-oxidation of the Fe materials by oxygen by their dosing into oxygen rich area or ensuring appropriate time delay between contact of additive with oxygen and NOx and ammonia. (C) 2018 Czech Environment Management Center. All rights reserved.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

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OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Waste Forum

ISSN

1804-0195

e-ISSN

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Svazek periodika

4

Číslo periodika v rámci svazku

2018

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

9

Strana od-do

421-429

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-85059988555