Kajian CFD Pengaruh Injeksi Uap Air terhadap Tingkat Emisi pada Burner Non-Premixed Berbahan Bakar Oli Bekas

Pertiwi, Cahyaning Hanum (2026) Kajian CFD Pengaruh Injeksi Uap Air terhadap Tingkat Emisi pada Burner Non-Premixed Berbahan Bakar Oli Bekas. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pemanfaatan oli bekas sebagai bahan bakar alternatif pada burner tipe non-premixed berpotensi mendukung transisi energi, namun menghasilkan emisi polutan yang tinggi. Salah satu metode yang dapat menurunkan emisi adalah injeksi air maupun uap air, yang bekerja melalui mekanisme pendinginan, pengenceran, dan interaksi kimia pada zona reaksi. Penelitian ini bertujuan untuk mengkaji pengaruh penambahan injeksi uap air terhadap emisi burner non-premixed berbahan bakar oli bekas menggunakan pendekatan Computational Fluid Dynamics (CFD). Dua skenario dibandingkan, yaitu burner dengan udara panas (tanpa injeksi uap air) dan dengan injeksi uap air menggunakan variasi mass flow 0.4 kg/h, 0.6 kg/h, dan 0.8 kg/h yang masing-masing diinjeksikan di suhu 260˚C. Parameter utama yang dianalisis meliputi tingkat emisi yang terbentuk, seperti: NOx; SO2; CO; UHC; dan PM (Jelaga). Hasil simulasi menunjukkan peningkatan mass flow uap air maupun udara panas menurunkan temperatur pembakaran, dengan uap air menghasilkan temperatur yang cenderung lebih rendah dibandingkan udara panas. Emisi NOx menurun signifikan seiring peningkatan mass flow uap air akibat penurunan temperatur dan efek pengenceran uap air, sementara emisi CO dan UHC justru meningkat pada mass flow uap air yang lebih tinggi akibat melemahnya intensitas reaksi oksidasi. Emisi SO₂ relatif stabil karena lebih dipengaruhi kandungan sulfur bahan bakar dibandingkan kondisi operasi. Pada variasi udara panas, mass flow 0.6 kg/h menghasilkan emisi CO, UHC, dan PM terendah, mengindikasikan kondisi pencampuran dan pembakaran paling optimal. Secara keseluruhan, injeksi uap air efektif menurunkan temperatur pembakaran dan emisi NOx, sedangkan injeksi udara panas menunjukkan performa lebih baik pada beberapa indikator pembakaran sempurna seperti CO, UHC, dan PM pada kondisi operasi tertentu.
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The utilization of waste oil as an alternative fuel in non-premixed type burners has the potential to support the energy transition; however, it generates high levels of pollutant emissions. One method that can be used to reduce these emissions is water or steam injection, which works through the mechanisms of cooling, dilution, and chemical interaction within the reaction zone. This study aims to examine the effect of steam injection on emissions from a non-premixed burner fueled by waste oil using a Computational Fluid Dynamics (CFD) approach. Two scenarios were compared: a burner using heated air (without steam injection) and a burner with steam injection at mass flow rate variations of 0.4 kg/h, 0.6 kg/h, and 0.8 kg/h, with a temperature of 260°C. The main parameters analyzed were the levels of emissions formed, including: NOX; SO₂; CO; UHC; and PM (soot). The simulation results show that increasing the mass flow rate of both steam and heated air decreases the combustion temperature, with steam producing relatively lower temperatures compared to heated air. NOX emissions decreased significantly with increasing steam mass flow rate due to the reduction in temperature and the dilution effect of steam, while CO and UHC emissions increased at higher steam mass flow rates due to weakening oxidation reaction intensity. SO₂ emissions remained relatively stable, as they are more influenced by the sulfur content of the fuel than by operating conditions. For the heated air variation, a mass flow rate of 0.6 kg/h produced the lowest CO, UHC, and PM emissions, indicating the most optimal mixing and combustion conditions. Overall, steam injection was effective in reducing combustion temperature and NOX emissions, while heated air injection demonstrated better performance on several indicators of complete combustion, such as CO, UHC, and PM, under certain operating conditions.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Injeksi uap air, Oli bekas, CFD, Emisi, Burner Water steam injection, Waste oil, emission
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA357 Computational fluid dynamics. Fluid Mechanics T Technology > TD Environmental technology. Sanitary engineering > TD883.5 Air--Pollution T Technology > TP Chemical technology > TP315 Fuel T Technology > TP Chemical technology > TP343 Liquid and gaseous fuel
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	CAHYANING HANUM PERTIWI
Date Deposited:	01 Aug 2026 02:04
Last Modified:	01 Aug 2026 02:04
URI:	http://repository.its.ac.id/id/eprint/139613

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