Experimental Investigation of Flame Characteristics of H 2 -Enriched Biogas Under Different Swirl Numbers

Gulzira Ainadinovna Koldassova, Karlygash Sadyrovna Idrissova, Aitbala Aitenovna Tumanova, Alma Saparovna Tussupbekova, Abay Mukhamediyarovich Dostiyarov and Dias Raybekovich Umyshev ()
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Gulzira Ainadinovna Koldassova: Heat Power Engineering Department, G.Daukeyev Almaty University of Power Engineering and Telecommunications, Baitursynov Str. 126/1, Almaty 050013, Kazakhstan
Karlygash Sadyrovna Idrissova: Heat Power Engineering Department, G.Daukeyev Almaty University of Power Engineering and Telecommunications, Baitursynov Str. 126/1, Almaty 050013, Kazakhstan
Aitbala Aitenovna Tumanova: Heat Power Engineering Department, G.Daukeyev Almaty University of Power Engineering and Telecommunications, Baitursynov Str. 126/1, Almaty 050013, Kazakhstan
Alma Saparovna Tussupbekova: Physical Chemistry, Catalysis and Petrochemistry Department, Kazakh National University Named After Al-Farabi, Al-Farabi Avenue, 71, Almaty 050040, Kazakhstan
Abay Mukhamediyarovich Dostiyarov: Heat Power Engineering Department, G.Daukeyev Almaty University of Power Engineering and Telecommunications, Baitursynov Str. 126/1, Almaty 050013, Kazakhstan
Dias Raybekovich Umyshev: Power Engineering Department, Satbayev University, Satbayev Str. 22, Almaty 050013, Kazakhstan

Energies, 2025, vol. 18, issue 6, 1-16

Abstract: Biogas, derived from human waste or industrial byproducts, is considered one of the most environmentally acceptable fuels. However, such fuels often exhibit relatively low efficiency, making it essential to develop technologies that facilitate their effective combustion. This article investigates the combustion of biogas with the addition of hydrogen at varying degrees of flow swirling. For this purpose, a burner was used in which methane, hydrogen and CO 2 were mixed in a mixer. The studies revealed that increasing the proportion of hydrogen in biogas leads to an average 15% rise in the NO x concentration. Additionally, an increase in the degree of swirling has a positive effect on NO x generation. On the other hand, a higher proportion of hydrogen reduces the concentration of CO in the exhaust gases. The presence of ballast gases, such as CO 2 , generally results in relatively low NO x levels when combined with a high swirling number. The analysis of combustion products for CO 2 indicates a 14% increase in CO 2 proportion. The highest concentrations of CO 2 were observed in biogas with the highest CO 2 ballast content. In terms of reducing NO x and CO, SW = 1.3 is the most successful. On the other hand, this angle leads to an increase in the CO 2 concentration.

Keywords: combustion; biogas; burner; hydrogen; NO x; CO 2 (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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