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All Journal AKSES: Jurnal Ekonomi dan Bisnis EduChemia: Jurnal Kimia dan Pendidikan Briliant: Jurnal Riset dan Konseptual JURNAL INTEGRASI CHEESA: Chemical Engineering Research Articles JAST : Jurnal Aplikasi Sains dan Teknologi Jurnal Pengabdian Magister Pendidikan IPA Jurnal Rekayasa Hijau Jurnal Teknologi Terapan DIKEMAS (Jurnal Pengabdian Kepada Masyarakat) JEECAE (Journal of Electrical, Electronics, Control, and Automotive Engineering) J-ADIMAS (Jurnal Pengabdian kepada Masyarakat) Jurnal khabar: Komunikasi dan Penyiaran Islam Jurnal Manajemen Publik dan Kebijakan Publik (JMPKP) Jurnal Dakwah dan Komunikasi Journal mechanical and manufacture technology (JMMT) Indonesian Journal of Social Science Research Automotive Experiences Jurnal Abdimas Dosma Journal of Mechanical Engineering, Science, and Innovation SENGKUNI Journal (Social Science and Humanities Studies) Journal of Comprehensive Science Jurnal Polimesin Jurnal Abdimas Dosma
Achmad Aminudin
Politeknik Negeri Madiun
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Optimizing injection pressure for diesel engines fueled with waste cooking oil biodiesel blends Aminudin, Achmad; Pamungkas, Doni Setyo; Basuki, Imam; Romandoni, Nanang; Nisa, Nur Ihda Farikhatin; Wardana, Kelvin Dwi
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.7819

Abstract

This study examines the effects of used cooking oil biodiesel and injection pressure on diesel engine performance and emissions. Highlights the combined effects of injection pressure and biodiesel blends. The fuel mixtures used were Pertamina Dex (B0), B50 (50% biodiesel), and B65 (65% biodiesel), with injection pressures of 160, 170, and 180 bar. Tests were conducted on a Dongfeng S195 diesel engine with a load of 1000–5000 watts. The parameters tested included fuel characteristics (density, viscosity, flash point, and calorific value), Brake Specific Fuel Consumption (BSFC), Brake Thermal Efficiency (BTE), and exhaust gas opacity. The results show that injection pressure plays a critical role in optimizing biodiesel combustion. The B65 blend at an injection pressure of 170 bar produced the lowest BSFC of 279.30 g/kWh and a high BTE of 25.54%, approaching that of pure diesel. In terms of emissions, the lowest opacity value of 5.88% was achieved with the B65 blend at 180 bar. These findings demonstrate that an optimal injection pressure, particularly 170 bar, can significantly improve fuel efficiency and combustion performance of high-percentage biodiesel blends while reducing exhaust smoke. Thus, used cooking oil biodiesel can improve fuel safety and efficiency as well as reduce emissions, provided it is combined with optimal injection pressure.
Optimization of KOH Catalyst Concentration and Reaction Temperature for Biodiesel Production from Waste Cooking Oil Achmad Aminudin; Bintang Arisendy; Agus Choirul Arifin; Nur Ihda Farikhatin Nisa
EduChemia: Jurnal Kimia dan Pendidikan Vol 11, No 1 (2026)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v11i1.32452

Abstract

This study aims to analyze the effects of variations in the KOH catalyst concentration and reaction temperature on the yield and characteristics of biodiesel produced from waste cooking oil through a transesterification process. The KOH catalyst concentration was varied at 0.5%, 1%, and 1.5%, while the reaction temperatures were set at 60°C, 65°C, and 70°C, respectively. The oil-to-ethanol molar ratio was maintained at 1:6, with a reaction time of 90 minutes and a stirring speed of 500 rpm. The results show that both the catalyst concentration and the reaction temperature influence the biodiesel yield and physical properties, including the density, viscosity, flash point, and calorific value. The highest biodiesel yield of 93.36% was achieved at a KOH concentration of 1% and a reaction temperature of 65°C. The biodiesel density ranged from 844.7 to 870.2 kg/m³, meeting the SNI 7182:2024 standard. The lowest viscosity, 4.78 cSt, was obtained at KOH concentrations of 1.5% and 70°C and remained within the acceptable standard range. All the samples exhibited flash points above 153.5°C. The highest calorific value, 49,682 J/g, was recorded at a KOH concentration of 1.5% and a reaction temperature of 70°C. Overall, the optimal conditions for maximum yield were 1% KOH and 65°C, whereas a higher reaction temperature of 70°C enhanced the energy quality of the biodiesel.
Co-Authors , Yoga Ahdiat Fakhrudi Agus Choirul Arifin Agus Susanto Alfi Salim Alfi Tranggono Agus Salim Alfi Tranggono Agus Salim Andriyani, Reza Putri Apip Amrullah Arifin, Agus Choirul Arifin Arrosida, Hanum Asnan, Muhammad Fathoni Azizah Qory Bintang Arisendy Budiarti, Yuli Ceryana Nia Rahmawati Cynthia Cahya Aditama Deni Nur Fauzi Dhanurseto Hadiprashada Diah Febriana Diaz Pratama Elza Febri Yusdetira F, Yoga Ahdiat Fakhrudi, yoga ahdiat Farid majedi Farid Majedi Farid Majedi, Farid Farozi Agus, Nour Fernando, Yuri Himawansyah, Bertarius Imam Basuki Indah Puspitasari Indarto Indarto Indarto Yuwono Jatmiko Yogopriyatno Juwari Kholis Nur Faizin Kholis Nur Faizin, Kholis Nur Kurniawan, Ahmad Misfa Kurniawan, Avip M. Haikal Akbar Maritha, Vevi Masayu Nazar Surya Kencana Mochamad Reza Arimurti Muhamad Fajar Subkhan Muhamad Rizki Fachrudin Fachrudin Muhammad Rifqi Agung Priandwika Muhyiddin Aziz Nana Ainiya Khalidah Nana Ainiya Khalidah NANANG ROMANDONI Nasrul Ilminnafik Nesaputro, Muhammad Wahyue Ni Jade Salsabila Noorsakti Wahyudi Noorsakti Wahyudi Nur Ihda Farikhatin Nisa Pamungkas, Doni Setyo Prasongko, Agung Putra, Roby Mahendra R. Akbar Nur Apriyanto Raden Mohamad Herdian Bhakti Radiffa Aditama Rahayu Mekar Bisono Rakhmad Gusta Putra Rizal Mahmud Roby Mahendra Putra Salsabila Pramudya Eka Putri Saputra, Ade Marta Shinta Fajar Sari Sri Novita Sari, Sri Novita Sudarni, Dyan Hatining Ayu Sulfan Bagus Setyawan suratman Umi Kulsum Viby Yuan Kurnia Wahyu Pribadi Wahyu Pribadi Wardana, Kelvin Dwi Wida Yuliar Rezika Yoga Ahdiat F Yoga Akhdiat Fahrudi Yogopriyatno, Jatmiko Yuli Prasetyo