Abstract:
The global shift toward renewable fuels and the reduction in anthropogenic environmental
impact have become increasingly critical. However, the current challenges in fully transitioning
to environmentally friendly fuels necessitate the use of transitional fuel mixtures. While many
alternatives have been explored, the combination of hydrogen and LPG appears to be the most
practical under the conditions specific to Kazakhstan. This study presents experimental findings on a
novel burner system that utilizes the airflow swirl and hydrogen enrichment of LPG. It evaluates the
effects of hydrogen addition, fuel supply methods, and swirl intensity—achieved by adjusting the
outlet vanes—on flame stabilization as well as NOx and CO emissions. The results show that the
minimum NOx concentration achieved was 12.08 ppm, while the minimum CO concentration was
101 ppm. Flame stabilization studies indicate that supplying the fuel at the center of the burner, rather
than at the base, improves stabilization by 23%. Additionally, increasing the proportion of hydrogen
positively affects stabilization. However, the analysis also reveals that, as the hydrogen content in
the fuel rises, NOx concentrations increase. These findings highlight the importance of balancing
the hydrogen enrichment, airflow swirl, and fuel supply methods to achieve optimal combustion
performance. While hydrogen-enriched LPG offers enhanced flame stabilization, the associated rise
in NOx emissions presents a challenge that requires careful management to maintain both efficiency
and environmental compliance.
