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CITRONELLA OIL AS BIOADDITIVES ON SI ENGINE PERFORMANCE CHARACTERISTICS Alfian, Devia; Farhani, Amna Citra; Supriyadi, Didik; Prahmana, Rico Aditia; Silitonga, Dicky J
Jurnal Rekayasa Mesin Vol. 14 No. 3 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i3.1284

Current dynamics of world energy supply have driven various innovations by the industry as well as research communities. Fossil fuels, although experiencing a declining interest due to sustainability issues, remain undeniably crucial since they are nearly irreplaceable in some sectors including electricity generation, it is necessary to continuously establish efforts to improve efficiency of those kinds of fuel. In this work, the authors evaluate the potential of locally sourced essential oils, namely citronella, as a fuel additive in a vision of raising the fuel economy of gasoline RON 90. Citronella oil was selected based on a positive hypothesis deduced from its chemical properties, as mentioned in multiple published works. Tests were made on a generator-set powered by gasoline engine using the mixture of RON 90 and citronella oil of various concentrations as the fuels. In addition, a commercial synthetic additive was also tested alongside the essential oil to provide a comparative figure. Meanwhile other investigators suggest a favorable effect of essential oils, our results show that citronella oil additions lead to higher fuel consumption at the same power level. A similar negative effect was also demonstrated by the synthetic additive. The only sector showing positive results is in terms of exhaust temperature where experiments with citronella additives create lower exhaust temperature as compared to pure gasoline and synthetic additives. However, rooms for innovation remain open by exploring other variables such as higher additive concentrations or combining different kinds of essential oils.

ANALISIS EFISIENSI PERFORMA PEMBAKARAN INTERNAL PADA KERJA MESIN EMPAT LANGKAH TERHADAP PENAMBAHAN ZAT ADITIF METANOL Damayanti Damayanti; Adimas Anugrah Rivandy; Athallah Satrionindya Herlambang; Guita Normi; Putra Hidayatulloh; Veronika Viany Suswanto; Agus Slamet Riyadi; Didik Supriyadi; Desi Riana Saputri; Yunita Fahni; Andri Sanjaya; Devia Gahana Cindi Alfian; Muhammad Triyogo Adiwibowo; Dikri Uzlifah Janah; Taharuddin Taharuddin
JURNAL INTEGRASI PROSES Vol 13, No 1 (2024)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i1.24936

Cadangan minyak bumi Indonesia terus menurun sedangkan jumlah kendaraan dan kebutuhan bahan bakar di Indonesia semakin meningkat. Peningkatan jumlah kendaraan, yang mana performa pembakarannya yang kurang sempurna dapat mengakibatkan banyaknya polusi udara. Penelitian ini bertujuan untuk meningkatkan kinerja motor bakar, dan mengurangi polusi udara dari emisi gas buang dengan cara menambahkan zat aditif metanol pada bahan bakar. Analisis performa mesin yang dilakukan yaitu power, torsi, break mean effective pressure, efisiensi termal, dan specific fuel consumption, serta pengujian emisi gas buang kendaraan. Pada analisis uji performa mesin bensin, terlihat bahwa dengan penambahan metanol sebanyak 1,2%, terjadi peningkatan torsi, power, dan BMEP pada putaran 2500 rpm masing-masing sebesar 49,45%, 53,38%, dan 49,55%.

CITRONELLA OIL AS BIOADDITIVES ON SI ENGINE PERFORMANCE CHARACTERISTICS Alfian, Devia; Farhani, Amna Citra; Supriyadi, Didik; Prahmana, Rico Aditia; Silitonga, Dicky J
Jurnal Rekayasa Mesin Vol. 14 No. 3 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i3.1284

Current dynamics of world energy supply have driven various innovations by the industry as well as research communities. Fossil fuels, although experiencing a declining interest due to sustainability issues, remain undeniably crucial since they are nearly irreplaceable in some sectors including electricity generation, it is necessary to continuously establish efforts to improve efficiency of those kinds of fuel. In this work, the authors evaluate the potential of locally sourced essential oils, namely citronella, as a fuel additive in a vision of raising the fuel economy of gasoline RON 90. Citronella oil was selected based on a positive hypothesis deduced from its chemical properties, as mentioned in multiple published works. Tests were made on a generator-set powered by gasoline engine using the mixture of RON 90 and citronella oil of various concentrations as the fuels. In addition, a commercial synthetic additive was also tested alongside the essential oil to provide a comparative figure. Meanwhile other investigators suggest a favorable effect of essential oils, our results show that citronella oil additions lead to higher fuel consumption at the same power level. A similar negative effect was also demonstrated by the synthetic additive. The only sector showing positive results is in terms of exhaust temperature where experiments with citronella additives create lower exhaust temperature as compared to pure gasoline and synthetic additives. However, rooms for innovation remain open by exploring other variables such as higher additive concentrations or combining different kinds of essential oils.

Utilization of Durian Peel as Adsorbent in Tofu Industrial Wastewater Treatment Dennis Farina Nury; Misbahul Huda; Hendri Kurniawan; Tulusma Basana Simaremare; Abdul Halim; Alfira Putri Damayanti; Didik Supriyadi; Deviany Deviany; Feerzet Achmad; Muhammad Zulfikar Luthfi; Andri Saputra
Industrial Innovation Vol. 2 No. 1 (2025): Industrial Innovation
Publisher : Politeknik ATK Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/vafm5b47

Tofu industry wastewater in Indonesia contains high concentrations of organic pollutants, especially chemical oxygen demand (COD), which often exceed regulatory discharge limits due to the lack of effective treatment systems in small-scale production units. This study was conducted to evaluate the performance of durian peel as a low-cost adsorbent for COD removal. The adsorbent was prepared through carbonization at 300°C for 1 hour and activated using 30% H₃PO₄ for 24 hours. Batch adsorption experiments were conducted by varying contact time (0–150 minutes) and adsorbent dosage (0.2–1.0 g) at constant shaking speed (150 rpm). The result showed that activated durian peel demonstrated potential as an adsorbent for tofu wastewater, though its iodine number fell below the SNI 06-3730-1995 standard. The optimum condition was achieved at 90 minutes and 0.6 g adsorbent, resulting in 85.75% COD removal. Adsorption equilibrium data were analysis using Langmuir and Freundlich isotherm models. The Freundlich model provided a better fit (R² = 0.7663), indicating multilayer adsorption on a heterogeneous surface. These findings confirm the potential of durian peel as an effective biosorbent for tofu wastewater treatment under optimal adsorption conditions.

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