Transformation of NO in Combustion Gases by DC Corona
This study investigates the performance of DC corona discharge electrostatic precipitators (ESPs) for NO conversion to increase DeNO<sub>x</sub> technologies’ efficiency for small-scale biomass combustion systems. Experiments were conducted using a 5 kW automatic wood pellet domestic hea...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
|
| Series: | Fire |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2571-6255/8/1/21 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832588506870841344 |
|---|---|
| author | Oleksandr Molchanov Kamil Krpec Jiří Horák Lenka Kuboňová František Hopan Jiří Ryšavý Marcelina Bury |
| author_facet | Oleksandr Molchanov Kamil Krpec Jiří Horák Lenka Kuboňová František Hopan Jiří Ryšavý Marcelina Bury |
| author_sort | Oleksandr Molchanov |
| collection | DOAJ |
| description | This study investigates the performance of DC corona discharge electrostatic precipitators (ESPs) for NO conversion to increase DeNO<sub>x</sub> technologies’ efficiency for small-scale biomass combustion systems. Experiments were conducted using a 5 kW automatic wood pellet domestic heat source with combustion gas treated in a specially designed ESP operated in both positive and negative corona modes, resulting in a reduction in NO concentrations from 130 mg/m<sup>3</sup> to 27/29 mg/m<sup>3</sup> for positive/negative polarities (at 0 °C and 101.3 kPa). NO conversion efficiency was evaluated across a range of specific input energies (SIEs) from 0 to 50 J/L. The results demonstrate that DC corona ESPs can achieve up to 78% NO reduction, with positive corona demonstrating a greater energy efficiency, requiring a lower SIE (35 J/L) compared to the negative corona mode (48 J/L). A detailed analysis of reaction pathways revealed distinct conversion mechanisms between the two modes. In positive corona, dispersed active species distribution led to more uniform NO conversion, while negative corona exhibited concentrated reaction zones with about 20% higher ozone production. The reactions involving O and OH radicals were more important in positive corona, whereas ozone-mediated oxidation dominated in negative corona. The research results demonstrate that ESP technology with DC corona offers a promising, energy-efficient solution for NO<sub>x</sub> control in small-scale combustion systems. |
| format | Article |
| id | doaj-art-b63d9b591aca41cfa72a1b6d6f73b7eb |
| institution | Kabale University |
| issn | 2571-6255 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fire |
| spelling | doaj-art-b63d9b591aca41cfa72a1b6d6f73b7eb2025-01-24T13:32:19ZengMDPI AGFire2571-62552025-01-01812110.3390/fire8010021Transformation of NO in Combustion Gases by DC CoronaOleksandr Molchanov0Kamil Krpec1Jiří Horák2Lenka Kuboňová3František Hopan4Jiří Ryšavý5Marcelina Bury6Energy Research Centre, Centre for Energy and Environmental Technologies, VSB—Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava, Czech RepublicEnergy Research Centre, Centre for Energy and Environmental Technologies, VSB—Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava, Czech RepublicEnergy Research Centre, Centre for Energy and Environmental Technologies, VSB—Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava, Czech RepublicEnergy Research Centre, Centre for Energy and Environmental Technologies, VSB—Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava, Czech RepublicEnergy Research Centre, Centre for Energy and Environmental Technologies, VSB—Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava, Czech RepublicEnergy Research Centre, Centre for Energy and Environmental Technologies, VSB—Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava, Czech RepublicFaculty of Energy and Fuels, Department of Fuels Technology, AGH University of Krakow, al. A. Mickiewicza 30, 30-059 Krakow, PolandThis study investigates the performance of DC corona discharge electrostatic precipitators (ESPs) for NO conversion to increase DeNO<sub>x</sub> technologies’ efficiency for small-scale biomass combustion systems. Experiments were conducted using a 5 kW automatic wood pellet domestic heat source with combustion gas treated in a specially designed ESP operated in both positive and negative corona modes, resulting in a reduction in NO concentrations from 130 mg/m<sup>3</sup> to 27/29 mg/m<sup>3</sup> for positive/negative polarities (at 0 °C and 101.3 kPa). NO conversion efficiency was evaluated across a range of specific input energies (SIEs) from 0 to 50 J/L. The results demonstrate that DC corona ESPs can achieve up to 78% NO reduction, with positive corona demonstrating a greater energy efficiency, requiring a lower SIE (35 J/L) compared to the negative corona mode (48 J/L). A detailed analysis of reaction pathways revealed distinct conversion mechanisms between the two modes. In positive corona, dispersed active species distribution led to more uniform NO conversion, while negative corona exhibited concentrated reaction zones with about 20% higher ozone production. The reactions involving O and OH radicals were more important in positive corona, whereas ozone-mediated oxidation dominated in negative corona. The research results demonstrate that ESP technology with DC corona offers a promising, energy-efficient solution for NO<sub>x</sub> control in small-scale combustion systems.https://www.mdpi.com/2571-6255/8/1/21electrostatic precipitatorsmall-scale combustionpollution controlNO<sub>x</sub>PM |
| spellingShingle | Oleksandr Molchanov Kamil Krpec Jiří Horák Lenka Kuboňová František Hopan Jiří Ryšavý Marcelina Bury Transformation of NO in Combustion Gases by DC Corona Fire electrostatic precipitator small-scale combustion pollution control NO<sub>x</sub> PM |
| title | Transformation of NO in Combustion Gases by DC Corona |
| title_full | Transformation of NO in Combustion Gases by DC Corona |
| title_fullStr | Transformation of NO in Combustion Gases by DC Corona |
| title_full_unstemmed | Transformation of NO in Combustion Gases by DC Corona |
| title_short | Transformation of NO in Combustion Gases by DC Corona |
| title_sort | transformation of no in combustion gases by dc corona |
| topic | electrostatic precipitator small-scale combustion pollution control NO<sub>x</sub> PM |
| url | https://www.mdpi.com/2571-6255/8/1/21 |
| work_keys_str_mv | AT oleksandrmolchanov transformationofnoincombustiongasesbydccorona AT kamilkrpec transformationofnoincombustiongasesbydccorona AT jirihorak transformationofnoincombustiongasesbydccorona AT lenkakubonova transformationofnoincombustiongasesbydccorona AT frantisekhopan transformationofnoincombustiongasesbydccorona AT jirirysavy transformationofnoincombustiongasesbydccorona AT marcelinabury transformationofnoincombustiongasesbydccorona |