Abstract
Effect of Variable Compression Ratios on Performance and Emission Phenomena of DI CI Engine Fuelled with Palm Stearin Biodiesel-Diesel Blends
Highlights
The increase in usage of internal combustion engine based automobile vehicles led to a dramatic increase in the demand for fossil fuels
Single stage transesterification process using sodium hydroxide and methanol was adopted as it was widely reported by many researchers for the conversion of bio-oil with lower free fatty acid content into biodiesel
The brake thermal efficiency (BTE) of all test fuels was observed to be low at no-load conditions for the case 17.5CR
Summary
The increase in usage of internal combustion engine based automobile vehicles led to a dramatic increase in the demand for fossil fuels. The test was conducted with characteristics on CI engine with varying compression ratio using the palm-biodiesel blend. Single stage transesterification process using sodium hydroxide and methanol was adopted as it was widely reported by many researchers for the conversion of bio-oil with lower free fatty acid content into biodiesel. On analysing the obtained data, it was noticed that the optimum conditions for biodiesel formation were 6:1 methanol to oil molar ratio, 62°C reaction temperature and 70 minutes of reaction time. 500 mL of palm stearin wax oil heated up to 65°C for 45 minutes and later blended with sodium methoxide solution. Palm stearin biodiesel and its fuel blends were assessed for its physicochemical properties namely density, calorific value, kinematic viscosity, flash and fire point (Table 1).
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