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Investigation of Waste Biogas Flame Stability Under Oxygen or Hydrogen-Enriched Conditions
| Content Provider | MDPI |
|---|---|
| Author | Nerijus, Striūgas Raminta, Skvorčinskienė Paulauskas, Rolandas Lisauskas, Aurimas |
| Copyright Year | 2020 |
| Description | Increasing production rates of the biomethane lead to increased generation of waste biogases. These gases should be utilized on-site to avoid pollutant emissions to the atmosphere. This study presents a flexible swirl burner (~100 kW) with an adiabatic chamber capable of burning unstable composition waste biogases. The main combustion parameters and chemiluminescence emission spectrums were examined by burning waste biogases containing from 5 to 30 vol% of CH4 in CO2 under air, O2-enriched atmosphere, or with the addition of hydrogen. The tested burner ensured stable combustion of waste biogases with CH4 content not less than 20 vol%. The addition of up to 5 vol% of H2 expanded flammability limits, and stable combustion of the mixtures with CH4 content of 15 vol% was achieved. The burner flexibility to work under O2-enriched air conditions showed more promising results, and the flammability limit was expanded up to 5 vol% of CH4 in CO2. However, the combustion under O2-enriched conditions led to increased NOx emissions (up to 1100 ppm). Besides, based on chemiluminescence emission spectrums, a linear correlation between the spectral intensity ratio of OH* and CH* (IOH*/ICH*) and CH4 content in CO2 was presented, which predicts blow-off limits burning waste biogases under different H2 or O2 enrichments. |
| Starting Page | 4760 |
| e-ISSN | 19961073 |
| DOI | 10.3390/en13184760 |
| Journal | Energies |
| Issue Number | 18 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2020-09-11 |
| Access Restriction | Open |
| Subject Keyword | Energies Environmental Engineering Swirl Burner Waste Biogas Hydrogen Oxygen Combustion Flame Stability Blow-off Limit |
| Content Type | Text |
| Resource Type | Article |
