The nitrogen oxide(NOx)release of diesel engines can be reduced using water in diesel emulsion fuel without any engine modification.In the present paper,different formulations of water in diesel emulsion fuels were pr...The nitrogen oxide(NOx)release of diesel engines can be reduced using water in diesel emulsion fuel without any engine modification.In the present paper,different formulations of water in diesel emulsion fuels were prepared by ultrasonic irradiation.The water droplet size in the emulsion,polydisperisty index,and the stability of prepared fuel was examined,experimentally.Afterwards,the performance characteristics and exhaust emission of a single cylinder air-cooled diesel engine were investigated using different water in diesel emulsion fuels.The effect of water content(in the range of 5%-10% by volume),surfactant content(in the range of 0.5%-2% by volume),and hydrophilic-lipophilic balance(HLB)(in the range of 5-8)was examined using Box-Behnken design(BBD)as a subset of response surface methodology(RSM).Considering multi-objective optimization,the best formulation for the emulsion fuel was found to be 5%water,2% surfactant,and HLB of 6.8.A comparison was made between the best emulsion fuel and the neat diesel fuel for engine performance and emission characteristics.A considerable decrease in the nitrogen oxide emission(-18.24%)was observed for the best emulsion fuel compared to neat diesel fuel.展开更多
以1,1,1,3,5,5,5-七甲基三硅氧烷（MDHM）和二乙烯基-1,4-丁二醇醚为原料,合成了聚醚改性的三硅氧烷表面活性剂。采用红外光谱（FT-IR）法和表面张力仪对其结构和性能进行了表征,并对其水解稳定性和乳化性能进行了测定。研究结果表明：...以1,1,1,3,5,5,5-七甲基三硅氧烷（MDHM）和二乙烯基-1,4-丁二醇醚为原料,合成了聚醚改性的三硅氧烷表面活性剂。采用红外光谱（FT-IR）法和表面张力仪对其结构和性能进行了表征,并对其水解稳定性和乳化性能进行了测定。研究结果表明：产物的CMC（临界胶束浓度）为0.026 g/L、γCMC（最低表面张力）为18.3 m N/m和HLB（亲水亲油平衡）值为13.37,说明产物具有渗透、润湿之双重特性,并能显著降低水溶液的表面张力;当产物的p H为5-8时,其具有良好的水解稳定性;该产物具有优良的亲油性和亲水性,并且其乳化性能优异。展开更多
文摘The nitrogen oxide(NOx)release of diesel engines can be reduced using water in diesel emulsion fuel without any engine modification.In the present paper,different formulations of water in diesel emulsion fuels were prepared by ultrasonic irradiation.The water droplet size in the emulsion,polydisperisty index,and the stability of prepared fuel was examined,experimentally.Afterwards,the performance characteristics and exhaust emission of a single cylinder air-cooled diesel engine were investigated using different water in diesel emulsion fuels.The effect of water content(in the range of 5%-10% by volume),surfactant content(in the range of 0.5%-2% by volume),and hydrophilic-lipophilic balance(HLB)(in the range of 5-8)was examined using Box-Behnken design(BBD)as a subset of response surface methodology(RSM).Considering multi-objective optimization,the best formulation for the emulsion fuel was found to be 5%water,2% surfactant,and HLB of 6.8.A comparison was made between the best emulsion fuel and the neat diesel fuel for engine performance and emission characteristics.A considerable decrease in the nitrogen oxide emission(-18.24%)was observed for the best emulsion fuel compared to neat diesel fuel.
文摘以1,1,1,3,5,5,5-七甲基三硅氧烷（MDHM）和二乙烯基-1,4-丁二醇醚为原料,合成了聚醚改性的三硅氧烷表面活性剂。采用红外光谱（FT-IR）法和表面张力仪对其结构和性能进行了表征,并对其水解稳定性和乳化性能进行了测定。研究结果表明：产物的CMC（临界胶束浓度）为0.026 g/L、γCMC（最低表面张力）为18.3 m N/m和HLB（亲水亲油平衡）值为13.37,说明产物具有渗透、润湿之双重特性,并能显著降低水溶液的表面张力;当产物的p H为5-8时,其具有良好的水解稳定性;该产物具有优良的亲油性和亲水性,并且其乳化性能优异。
