Skip to content
1900

Hydrogen Admixture Effects on Natural Gas-Oxygen Burner for Glass-melting: Flame Imaging, Temperature Profiles, Exhaust Gas Analysis, and False Air Impact

Abstract

An experimental investigation is carried out to evaluate the effect of introducing hydrogen into natural gas flames on the combustion process (different temperature profiles, flame locations, and burning velocity) in glass melting furnaces. This work considers the fundamental changes in a non-premixed natural gas-oxygen flame (referred to as oxyfuel flame) with varying levels of hydrogen admixtures ranging from 0 to 100 vol%. To facilitate meaningful data comparisons, the burner power output is maintained at a constant thermal power of 20 kW during the entire series of tests. At first, the flow field of the oxyfuel burner is measured by using laser doppler anemometry (LDA). Then the burner is tested in a multi-segment combustion chamber with optical accesses. A camera system is employed to visually observe the combustion zone, capturing signals in both the visible (VIS) and ultraviolet (UV) wavelengths. The chemiluminescence of the OH* radicals could be determined over the entire flame length. Notably, the study reveals variations in flame position, especially with higher hydrogen concentrations. Furthermore, radial and axial flame temperature profiles are recorded at various po sitions. The analysis extends to major exhaust gas components (CO2, NOx, O2) at different fuel compositions and multiple equivalence ratios. In addition, a study is being carried out to investigate the influence of false air impacts. The obtained results indicate that the flame temperature increases slightly with pure hydrogen. The NOx values in the overall exhaust gas also show an increase with a higher hydrogen admixture. In particular, the influence of false air can lead to a significant rise in NOx levels.

Funding source: The authors would like to acknowledge the financial support in the KlimPro-project MiGWa: CO2 reduction in glass production by innova tive and climate-friendly heating; TP2: Combined glass melting with microwaves and H2 oxyfuel combustion (01LJ2001B), financed by DLR and BMBF. Further, the project was funded by the European Union
Related subjects: Applications & Pathways
Countries: Germany
Loading

Article metrics loading...

/content/journal6790
2025-01-18
2025-03-18
/content/journal6790
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error