Transesterification of vegetable oils in supercritical methanol are carried out without using any catalyst. Methyl esters of vegetable oils or biodiesels have several outstanding advantages among other new-renewable and clean engine fuel alternatives and can be used in any diesel engine without modification. The most important variables affecting the methyl ester yield during the transesterific...

The lubricating oils in each mechanical device are affected by shear forces. Polymers in lubricating oils engine, in particular, undergo many changes because of the influence of the applied forces. Awareness of these changes can help us to design optimal formulations. In this work, shear stability of four commercial was studied. Calculation of various parameters about viscosity in the enhancing...

The purpose of this study was to investigate the regeneration effect waste cooking oil (WCO) on aged asphalt with molecular dynamics (MD) simulation, comparing it a rejuvenator. Firstly, models virgin and were established by blending four components (saturate, aromatic, resin, asphaltenes). Then, different dosages rejuvenator WCO (6, 9, 12%) included in model for its regeneration. After that, M...

Waste cooking oil or waste (WCO) is the remaining (or by-products) produced during food frying. In 2019, consumption in Bali Province was 4,735,057 L/month and WCO estimated about 3,314,540 L/month. The Government of plans to manage an integrated manner by processing it as derivative products with economic value. study aimed transform into high-value added (i.e. aromatherapy candles, liquid soa...

This study deals with artificial neural network (ANN) modeling a diesel engine using waste cooking biodiesel fuel to predict the brake power, torque, specific fuel consumption and exhaust emissions of engine. To acquire data for training and testing the proposed ANN, two cylinders, four-stroke diesel engine was fuelled with waste vegetable cooking biodiesel and diesel fuel blends and operated a...

Various proportions of bentonite clay performing as co-catalysts were evaluated for the production biodiesel from waste cooking oil (WCO). The results showed that use a heterogeneous co-catalyst could significantly increase yield by approximately 50% control. improved properties produced including acid number, free fatty acids (FFA), relative density, kinematic viscosity and flash poi...