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ABSTRACT
In this study, an investigation has been carried out to examine the tribological features of Rice bran oil (RBO) based biodiesel as an agent to improve lubricity. RBOB was successfully generated by the means of transesterification and the studied fuels were pure biodiesel (RBOB100), 10% (RBOB10), 30% (RBOB30), and 50% (RBOB50) of biodiesel combined with diesel and pure diesel (RBOB0). Examination in agreement with the ASTM D 4172 method was carried out under following conditions for all examined fuels: a constant load of 40 kg, a steady sliding speed of 1200 rpm, a constant temperature of 75°C and a reaction time of 3600 s. Frictional torque was recorded on line in the course of wear examination. Optical microscopy was implemented to investigate the wear scars of tested balls. Result showed that friction diminished with the decrease of biodiesel concentration. Moreover, formation of wear scars increased with increasing the biodiesel concentration. It could be concluded that lubricity decreases due to increasing the biodiesel concentration. Surface morphology analysis showed that pure biodiesel and diesel formed adhesive wears. However, all the wears formed by biodiesel-diesel blends were fallen into the abrasive wear group.
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Notes on contributors
Hoora Mazaheri
Hoora Mazaheri is a PhD student at the department of mechanical engineering, University Malaya, Malaysia. Her research interests are catalysis and biodiesel area. Her current project is focused on developing a heterogeneous catalyst from a distinct type of seashell.
Hwai Chyuan Ong
Hwai Chyuan Ong is from the department of mechanical engineering, University of Malaya. His research interests are wide-ranging under the general umbrella of renewable energy. However, his main interests are biofuel & bioenergy, solar thermal and green technology & environmental engineering.
H. H. Masjuki
H. H. Masjuki is currently appointed as a Senior Professor in Mechanical Engineering Department, University of Malaya. His research interests are corrosion Science and Engineering (Tribology, Lubricant, Lube-oil Based Condition Monitoring, Tribo-corrosion, Material Corrosion) Combustion and Fuel Engineering (Automobile Engine Performance and Emission Monitoring, Energy Efficiency, Biofuels, Alternative Energy resources, Life cycle analysis) Exergy, Renewable and Sustainable Energy.
A. Arslan
A. Arslan is a Mechanical Engineer. He is working as an Assistant Professor in COMSATS University Islamabad, Sahiwal Campus. His area of specialization includes Automotive and Manufacturing Tribology, Renewable Energy and Surface Engineering. After finishing his MS, he did PhD in IC Engine Tribology from University of Malaya (QS World University Rank 70). In his PhD research, he used laser micro texturing to improve wear and friction behaviour of Diamond like Carbon coated automotive components. He has 5 years of teaching and research experience. He has supervised several post graduate theses.
Wen Tong Chong
Wen Tong Chong is the inventor of Wind, Solar and Rain Harvester, Exhaust Air Energy Recovery System, Solar-Hydro Energy System, Eco Roof System, Eco-GreeneryTM Outdoor Lighting System and Cross-Axis-Wind-Turbine (First Prize of the National Intellectual Property Award, AHIN 2016 (Patent Category) & WIPO Medal for Inventors). He conducts research in the area of Renewable Energy & Green Technology.
Zeynab Amini
Zeynab Amini is a PhD candidate at the Centre for Tropical Crops and Biocommodities, Queensland University of Technology, Brisbane, Australia. Zeynab does research in Biotechnology and Bioprocess areas. Her current project is focused on fungal protein production using low-quality tropical fodder as a substrate.