Abstract
This paper presents an experimental investigation of the combustion characteristics of palm methyl ester (PME), also known as palm oil-based biodiesel, in an oil burner system. The performance of conventional diesel fuel (CDF) and various percentages of diesel blended with palm oil-based biodiesel is also studied to evaluate their performance. The performance of the various fuels is evaluated based on the temperature profile of the combustor’s wall and emissions, such as nitrogen oxides (NOx) and carbon monoxide (CO). The combustion experiments were conducted using three different oil burner nozzles (1.25, 1.50 and 1.75 USgal/h) under lean (equivalence ratio (Φ) = 0.8), stoichiometric (Φ = 1) and rich fuel (Φ = 1.2) ratio conditions. The results show that the rate of emission formation decreases as the volume percent of palm biodiesel in a blend increases. PME combustion tests present a lower temperature inside the chamber compared to CDF combustion. High rates of NOx formation occur under lean mixture conditions with the presence of high nitrogen and sufficient temperature, whereas high CO occurs for rich mixtures with low oxygen presence.
Highlights
In recent years, global interest in biodiesel production and utilization has increased significantly due to the international energy crisis, global warming and climate change, as well as fossil fuel depletion [1]
Experimental results confirm that diesel fuel generated higher wall temperatures than palm oil-based biodiesel and its blends during the combustion tests
The combustion performance of palm methyl ester (PME) was compared to diesel under various conditions
Summary
Global interest in biodiesel production and utilization has increased significantly due to the international energy crisis, global warming and climate change, as well as fossil fuel depletion [1]. Biodiesels, which are fatty acid methyl or ethyl esters made from biomass vegetable oils, are non-polluting fuels and a renewable energy source. Biodiesels are recognized as a viable substitutes for diesel fuel which can be produced with similar functional properties as fossil fuels from local feedstocks. A variety of feedstocks can be employed for biodiesel production like rapeseed, soybean, palm oil and jatropha [2]. As one of the main agricultural products in Malaysia, is mostly applied for biodiesel production in that region. Palm oil-based biofuel could generate a similar efficiency as diesel fuel with lower pollutant emissions, but with higher specific fuel consumption
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