Determination of the Sesame Oil Biodiesel (SOB) Ratio Providing the Lowest Emissions by Multi-Purpose RSM Optimization

Abstract

Emissions from internal combustion engine vehicles have a major impact on environmental pollution and global warming, which are among the world's biggest problems. The use of alternative fuels is quite popular to reduce the emission values originating from diesel engines, which are preferred due to their high efficiency. Another issue that has become popular in recent years is optimization studies for alternative fuels. In this study, to determine the most suitable sesame oil biodiesel (SOB) in terms of emissions in a single cylinder diesel engine using SOB as an alternative fuel, firstly engine experiments were performed, and response surface methodology (RSM) optimization was performed using experimental data. In the optimization design, SOB percentage and engine load were determined as factors, while carbon monoxide (CO), hydrocarbon (HC), carbon dioxide (CO2), and nitrogen oxide (NOx) were determined as responses affected by the factors. The optimum variable levels offered by the optimization study are 15% SOB and 850 W engine load. The emission levels designed as responses under these conditions are 0.0680% CO, 7.1858 ppm HC, 4.0887% CO2, and 316.4166 ppm NOx. When compared with the test results, it was concluded that the RSM results and the test results converged in the 0.71%-2.34% error range and accordingly the RSM optimization was successfully performed.

Keywords

• Optimization
• biodiesel
• sesame oil
• emission reduction
• diesel engine

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