Preheated Biodiesel Derived from Vegetable Oil on Performance and Emissions of Diesel Engines: A Review

Abstract:

This present study discusses the effects of preheated biodiesel and its blends on the performance and emissions of diesel engines. Limited supply of fossil fuel makes biodiesel as one of the major solution for this current situation. However, in using biodiesel and its blends as fuel had created few problems such as poor fuel droplet formation and atomization that consequently result on lots of carbon formation deposit on the valves and injector choking. These problems occur due to the effect of higher viscosity of the biodiesel and its blends itself. This paper reviews the recent research on the effects of preheated biodiesel on viscosity and thus influences to the performance and emissions. Generally there are four methods to lower the viscosity that are heating, blending, micro-emulsification and transesterification. Heating is the easiest solution to bring lower the viscosity. Biodiesel and its blends were heated up before combustion process and most of the researcher reported that the brake power was lower than diesel fuel but higher than unheated biodiesel while the BSFC was found to be higher than diesel fuel and unheated biodiesel. In addition, it observed that the NO_x emission was higher than that of diesel fuel and unheated biodiesel.

• Periodical: Applied Mechanics and Materials (Volumes 465-466)
• Pages: 285-290
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.465-466.285
• Online since: December 2013
• Authors: Norrizal Mustaffa, Amir Khalid, Mohamad Farid Sies, Hanis Zakaria, Bukhari Manshoor
• Keywords: Diesel, Emission, Mixture Formation, Performance, Preheated Biodiesel, Viscosity

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