Electrostatic precipitation for NOx emission control in small-scale combustion: A predictive approach and experimental validation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27650%2F25%3A10257542" target="_blank" >RIV/61989100:27650/25:10257542 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1383586625016582#bi005" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1383586625016582#bi005</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.seppur.2025.133061" target="_blank" >10.1016/j.seppur.2025.133061</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrostatic precipitation for NOx emission control in small-scale combustion: A predictive approach and experimental validation

Popis výsledku v původním jazyce

Electrostatic precipitators (ESPs) applied to small-scale combustion systems are effective in reducing Particulate Matter (PM) emissions but also can reduce NOx. However, the absence of a practical predictive model has hindered the widespread adoption of ESPs for this purpose. This study addresses that gap by developing and experimentally validating a simplified mathematical model to predict NOx removal efficiency in ESPs operating with both positive and negative corona discharges. The model captures the unique plasma chemistry of DC corona—specifically the spatially non-uniform generation of active species and the key chemical kinetics that drive NOx conversion. To validate the model, an ESP was integrated with a 5-kW pellet stove and tested under varying operational regimes. Under standard conditions (0 °C and 101.3 kPa), NOx concentrations were reduced from 200 mg/m3 to 44 mg/m3 using positive polarity and to 46 mg/m3 using negative polarity, achieving an overall removal efficiency of 78 % in both cases. However, the specific input energy for positive corona (35.7 J/L) was lower than that for negative corona (48.4 J/L). With prediction accuracies within 10 % of the experimental measurements, the model demonstrates robust reliability for practical engineering. This research advances efficient, cost-effective NOx control techniques in ESPs, and has the potential to promote the reduction of global pollution.

Název v anglickém jazyce

Electrostatic precipitation for NOx emission control in small-scale combustion: A predictive approach and experimental validation

Popis výsledku anglicky

Electrostatic precipitators (ESPs) applied to small-scale combustion systems are effective in reducing Particulate Matter (PM) emissions but also can reduce NOx. However, the absence of a practical predictive model has hindered the widespread adoption of ESPs for this purpose. This study addresses that gap by developing and experimentally validating a simplified mathematical model to predict NOx removal efficiency in ESPs operating with both positive and negative corona discharges. The model captures the unique plasma chemistry of DC corona—specifically the spatially non-uniform generation of active species and the key chemical kinetics that drive NOx conversion. To validate the model, an ESP was integrated with a 5-kW pellet stove and tested under varying operational regimes. Under standard conditions (0 °C and 101.3 kPa), NOx concentrations were reduced from 200 mg/m3 to 44 mg/m3 using positive polarity and to 46 mg/m3 using negative polarity, achieving an overall removal efficiency of 78 % in both cases. However, the specific input energy for positive corona (35.7 J/L) was lower than that for negative corona (48.4 J/L). With prediction accuracies within 10 % of the experimental measurements, the model demonstrates robust reliability for practical engineering. This research advances efficient, cost-effective NOx control techniques in ESPs, and has the potential to promote the reduction of global pollution.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20700 - Environmental engineering

Projekt

<a href="/cs/project/SS02030031" target="_blank" >SS02030031: Integrovaný systém výzkumu, hodnocení a kontroly kvality ovzduší</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Separation and Purification Technology

ISSN

1383-5866

e-ISSN

1873-3794

Svazek periodika

368

Číslo periodika v rámci svazku

17 September 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

1-13

Kód UT WoS článku

001475783200001

EID výsledku v databázi Scopus

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