Chalimah, Siti (2025) STUDI EKSPERIMENTAL PENGARUH PENAMBAHAN N-BUTANOL DAN BUTYLATED HYDROXYTOLUENE PADA MESIN DIESEL BERBAHAN BAKAR CRUDE PALM OIL TERHADAP VARIASI PUTARAN MESIN. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
The study evaluates the impact of adding n-Butanol and Butylated Hydroxytoluene (BHT) additives on the performance and emissions of a diesel engine fueled with Crude Palm Oil (CPO) and a B40 biodiesel blend. CPO is considered a promising renewable alternative fuel; however, its high viscosity and suboptimal emissions remain key challenges. The experiment was conducted using a single-cylinder diesel engine (Kubota RD 65 DI-NB) connected to a Denyo FA-5 alternator under a constant load of 4000 Watts. The fuel variations tested included preheated CPO (100°C), CPO with n-Butanol, CPO with BHT, B40, B40 with n-Butanol, and B40 with BHT. The tests were carried out across five engine speeds (1250–2250 RPM). Parameters observed included engine power, torque, brake specific fuel consumption (BSFC), thermal efficiency, temperatures of engine components (cylinder block , cylinder head, exhaust pipe, intake pipe, and coolant tank), as well as engine characteristics such as vibration, noise, light intensity, and exhaust emissions (CO, CO₂, HC, and smoke opacity). The results showed that the B40 + n-Butanol blend delivered the best performance, with an average power output of 2.11 kW, torque of 11.30 Nm, and thermal efficiency of 24%. It also produced the lowest levels of CO, HC, and smoke opacity emissions, while the highest CO₂ emissions from this blend indicated the most complete combustion. In contrast, pure CPO exhibited the lowest engine performance and the highest pollutant emissions. The addition of n-Butanol was also found to increase the temperature of engine components due to more intense combustion. In conclusion, the B40 + n-Butanol blend stands out as a more efficient and environmentally friendly fuel option, significantly improving engine performance and reducing emissions, thus demonstrating strong potential as a sustainable alternative to fossil diesel.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TJ Mechanical engineering and machinery | ||||||||
| Divisions: | Faculty of Engineering > Departement of Mechanical Engineering | ||||||||
| Depositing User: | Siti Chalimah | ||||||||
| Date Deposited: | 14 Nov 2025 07:34 | ||||||||
| Last Modified: | 14 Nov 2025 07:34 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/46667 |
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