Performance and emission analysis of rubber seed, palm, and their combined blend in a multi-cylinder diesel engine

Adam, I.K. and Abdul Aziz, A.R. and Heikal, M.R. and Yusup, S. and Firmansyah, and Ahmad, A.S. and Zainal Abidin, E.Z. (2018) Performance and emission analysis of rubber seed, palm, and their combined blend in a multi-cylinder diesel engine. Energies, 11 (6).

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In consideration of its vast resources in Malaysia, the potential use of a nonedible biodiesel source from rubber seed oil (RSO) is explored. However, a mixture with a high saturation content feedstock is required to increase its oxidation stability, which is caused by its 78.93 unsaturation content. Two blends of 20 and 50 v/v rubber seed biodiesel (RB) or palm biodiesel (PB) and varying percentage mixtures of these two feedstock oils biodiesel (RPB) were evaluated on combustion performance in a 55 kW multi-cylinder diesel engine at full load conditions. The results showed that feedstock blending offered benefits in terms of fuel properties enhancement, improved engine performance, and reduced emissions. In comparison to RB, RPB showed higher brake power (BP) of 1.18-2.97 and lower brake specific fuel consumption (BSFC) of 0.85-3.69, smoke opacity (11.89-14.19), carbon monoxide (CO) of 2.48-6.93, hydrocarbon (HC) of 2.36-9.34, and Nitrogen oxide (NO) emissions of 2.34-5.93. The cylinder pressures and heat release rates (HRR) of RPB blends were 8.47-11.43 and 36.02-46.61 higher than diesel, respectively. The start of combustion angles (SOC) of RB and RPB blends were from �13 to �15�C and from �13.2 to �15.6 crank angle degree (�CA) before top dead center (BTDC), but the combustion delays were 6-8�C and 5.4-7.8�C shorter when compared to diesel fuel which were �10�C BTDC and 11�C, respectively. It can be concluded that RPB blends showed better performance and emissions over the individual rubber seed and palm biodiesel blends and can replace diesel fuel in unmodified engines. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.

Item Type:Article
Impact Factor:cited By 0
Uncontrolled Keywords:Biodiesel; Blending; Brakes; Carbon monoxide; Combustion; Diesel fuels; Engine cylinders; Feedstocks; Fuel consumption; Mixtures; Nitrogen oxides; Palm oil; Rubber, Brake specific fuel consumption; Combustion performance; Heat Release Rate (HRR); NO reduction; Oxidation stability; Performance and emissions; Rubber seed; Start of combustion, Diesel engines
Departments / MOR / COE:Research Institutes > Energy
ID Code:21546
Deposited By: Mr Ahmad Suhairi
Deposited On:01 Aug 2018 03:12
Last Modified:16 Nov 2018 08:56

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