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点火和燃烧是高密度燃料在新型发动机上应用的关键技术之一。使用十八酸作为保护剂制备了纳米钯金属颗粒,采用红外、核磁、差热分析和透射电镜等手段对其进行了表征。发现颗粒的平均粒径随着合成液中十八酸与钯前驱化合物摩尔比的增加而减小,纳米颗粒可长期稳定分散在燃料中而不沉降。评价了纳米颗粒催化高密度燃料HD-01的点火燃烧性能,发现添加质量分数为0.01‰,十八酸/Pd原料配比为4:1的颗粒可将HD-01的点火燃烧温度降低约230°C。
Ignition and combustion are one of the key technologies for high-density fuel applications on new engines. Nanoparticles of palladium nanoparticles were prepared by using octadecanoic acid as a protective agent and characterized by IR, NMR, DTA and TEM. The average particle size of the particles was found to decrease as the molar ratio of stearic acid to palladium precursor compound in the synthesis solution increased, and the nanoparticles were stably dispersed throughout the fuel without settling over time. The ignition and combustion performance of HD-01 catalyst catalyzed by nano-particles was evaluated. It was found that the ignition combustion temperature of HD-01 was reduced by about 230% when the mass fraction was 0.01% and the ratio of stearic acid / Pd 4:1 ° C.