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All Journal Jurnal Pendidikan dan Pengajaran Jurnal Inovasi Pendidikan JIPTEK : Jurnal Ilmiah Pendidikan Teknik dan Kejuruan PAWIYATAN Automotive Experiences
Herman Saputro
Universitas Negeri Sebelas Maret Surakarta
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

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Journal : Automotive Experiences

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Enhancing Stoichiometric Methane-Air Flames: The Role of N2O Replacement Purwanto, Aris; Saputro, Herman; Alhikami, Akhmad Faruq; Munir, Fudhail Abdul
Automotive Experiences Vol 8 No 2 (2025)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13422

Abstract

The oxidizer is used in aviation propellants for its relatively high impulse density and non-toxic nature. At elevated temperatures, nitrous oxide (N₂O) decomposes into approximately 33% oxygen (O₂) and 67% nitrogen (N₂), providing a higher oxygen content than ambient air. This decomposition enables N₂O to produce higher flame temperatures than air. Previous studies have shown that N₂O addition improves flame stability in methane combustion systems. This study examined the substitution of O₂ with N₂O in stoichiometric methane–air premixed flames, using both numerical and experimental methods. One-dimensional and two-dimensional simulations with CHEMKIN PRO revealed that replacing air with N₂O increases flame temperature but reduces laminar flame speed, mainly due to lower local oxygen concentrations in the reaction zone. The simulations also showed that nitrogen oxides (NOₓ) emissions increase significantly in the post-reaction zone, while carbon monoxide (CO) and carbon dioxide (CO₂) emissions decrease. Experimental results confirmed that controlled N₂O addition enhances flame stability, but excessive concentrations can trigger combustion instabilities. Overall, the findings indicate that introducing up to 20% N₂O can increase flame temperature and reduce CO emissions in methane flames.
Co-Authors Akhmad Faruq Alhikami Ali Djamhuri Ayu Fiska Nurryna Cahyono, Rohmat Indah Widiastuti Munir, Fudhail Abdul Widiastusi , Indah