Combustion and Emission Characteristics of Coconut-Based Biodiesel in a Liquid Fuel Burner

Abstract

This paper presents an investigation on the combustion performance of different Coconut Methyl Ester (CME) biodiesel blends with Conventional Diesel Fuel (CDF) under B5 (5% CME, 95% CDF), B15 (15% CME, 85% CDF), and B25 (25% CME, 75% CDF) conditions. The performances of these fuels were evaluated based on the temperature profiles of the combustor wall and emission concentration of Oxides of Nitrogen (NO x ), Sulphur Dioxide (SO 2 ), and Carbon Monoxide (CO). The fuel properties of the CME biodiesel blends were measured and compared with CDF. All tested fuels were combusted using an open-ended combustion chamber at three different equivalence ratios, i.e., lean fuel to air mixture (Φ = 0.8), stoichiometry (Φ = 1.0), and rich fuel to air mixture (Φ =1.2), using a standard solid spray fuel nozzle. The results indicated that CME biodiesel blends combust at a lower temperature and produce less emission in comparison with CDF for all equivalence ratios. Moreover, the increase of CME content in biodiesel blends reduced the temperature of the combustor wall and the emission concentration. Results also proved that the utilization of biodiesel is beneficial to various industrial applications, especially in the transportation sector due to it being environmentally friendly, and serves as an alternative to petroleum diesel fuel.

Effect of Dominant Fatty Acid Esters on Emission Characteristics of Waste Animal Fat Biodiesel in CI Engine

“…Here, the closer margin between CO 2 emission concentration for diesel sample and palmitate blend is explained by their reduced carbon chain length and lower C/H ratio which tends to produce less CO 2 emission than compared to other blends (Adler and Bandhauer, 2017). Highest CO 2 emission concentration was noted for biodiesel blend owing to its adequate oxygen content and increased rate of viscosity that endows sufficient time to complete the combustion during expansion stroke (Abdul Malik et al, 2017). Moreover, increase in CO 2 emission concentration for oleate and stearate blend was because of their long carbon chain length corresponding to the fatty acids in their structure.…”

Biodiesel Production from a Novel Nonedible Feedstock, Soursop (Annona muricata L.) Seed Oil

“…Biodiesel, a biomass-derived fuel, is renewable, exhibits superior combustion properties, and is completely suitable for diesel engines [1,2]. Furthermore, the use of biodiesel results in relatively low environmental pollution because biodiesel is sulfur free and emits minimal carbon monoxide and hydrocarbons [3][4][5]. Because of these merits, biodiesel has been developed worldwide to replace petrodiesel.…”

Experimental study on influence of dominant fatty acid esters in engine characteristics of waste beef tallow biodiesel

“…The CO 2 emission increased by 4.16, 13 and 21.53% for B10, B20 and B30 blends for blend samples whereas in case of ester samples, a marginal rise by 1.6% was noted for palmitate blend and drastic rise was noticed for stearate and oleate blends which increased by 9.81 and 10.87%. In addition, the higher concentration of CO 2 emission for higher blends was a result of higher oxygen content and viscosity rate which provides time for complete combustion during the power stroke (Abdul Malik et al., 2017). The CO 2 emission was found to be lesser by 1.92, 2.91 and 11.23% for oleate, stearate and palmitate blends when compared to biodiesel blend.…”