Abstract
Renewable alternatives to fossil fuels, such as biodiesel, are necessary to lessen emission of greenhouse gases that are causing climate change. Using a high-pressure, medium-duty, common-rail, turbocharged four-cylinder diesel engine, this work studies the effect of adding Cocos nucifera biodiesel to conventional diesel on exhaust emissions, engine performance, and combustion characteristics. An analysis and characterization of the key physicochemical properties of diesel, biodiesel, and biodiesel–diesel blends were carried out. The engine was fuelled with pure petroleum diesel and blended diesel containing a 10%, 20%, 30%, and 50% volume of coconut oil at full throttle and six different speed settings, respectively. The results showed relatively close physicochemical properties between the biodiesel blend and conventional petroleum fuel. Observations made over the entire speed range indicated that a higher coconut oil biodiesel (COB) content lowers the torque and brake power compared to diesel. In the case of engine exhaust gas, a reduction in carbon monoxide (CO) and smoke emissions were observed. Notably, COB50 gives out the highest nitrogen oxides (NOx) but it is raised even for other blends. The experimental results also demonstrated that a higher COB content achieves a lower peak pressure while the peak heat release rate (PHRR) was lower than that of conventional diesel as the speed of the engine increases.
Highlights
Petroleum-based fuel has become the worldwide main source of energy and this fuel usage had taken up a percentage of 85% (32% crude petroleum oil, 29% coal, and 24% natural gas in the year2015)
Analysis of the physicochemical properties of both the neat coconut oil biodiesel and petroleum diesel was carried to determine the suitability of the fuels to be run in diesel engines
Cylinder pressure was found to be affected by several factors, including fuel–air mixture formation, ignition delay, and combustion rate in the pre-mixed combustion phase [6]
Summary
Petroleum-based fuel has become the worldwide main source of energy and this fuel usage had taken up a percentage of 85% (32% crude petroleum oil, 29% coal, and 24% natural gas in the year2015). Petroleum-based fuel has become the worldwide main source of energy and this fuel usage had taken up a percentage of 85% The forecasted global fuels demand by 2040 is presented by [2]. The global energy demand is speculated to grow by an average of 1% per annum from 2010 to 2040. Processes 2020, 8, 1287 serves to intensify environmental pollution and greenhouse gas emissions, which are closely linked to overwhelming climate change [3]. It has become a worldwide matter to develop clean fuel that is environmentally acceptable, domestically available, and, at the same time, technically feasible [4]
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