Potential of Di-Ethyl Ether in Reducing Emissions from Heavy-Duty Tractors 2023-01-0285

Considering the demand for sustainable transport, alternative fuels are a keen research topic for IC engine researchers. Among various alternative fuels being explored, Di-ethyl ether (DEE) is gaining popularity off-late for compression-ignition (CI) engines owing to its high cetane rating, oxygen presence in its molecular structure, and lower carbon content. This study explores the suitability of DEE blends in tractor engines. DEE blends [15% and 30% (v/v)] with diesel were compared with baseline diesel for combustion, and emission characterisation, keeping all parameters identical, including the fuel injection timings. Results were analysed for different engine loads at 1500 rpm. Delayed combustion was observed with DEE blends with diesel, possibly due to a higher cooling effect from DEE vaporisation and retarded dynamic fuel injection due to its higher compressibility. However, the DEE blend fuelled engine performance was comparable to baseline diesel. Considerable reductions in NOx and soot emissions were observed with DEE30. Hence, compared to DEE15, DEE30 emerged as a more suitable fuel for heavy-duty tractor engines using a mechanical fuel injection system, exhibiting lower emissions and comparable efficiencies.