Effects of the NiFe 2 O 4 nanoadditive on the performance and emission characteristics of diesel engines: ultrasonic green synthesis by T3 hormone.

NiFe 2 O 4 nanosheets were successfully synthesized via combined ultrasonic and combustion methods using triiodothyronine (T3) hormone as a biotemplate. Isodiesel and heavy diesel were selected as feedstocks to evaluate the ultrasound-assisted catalytic oxidation process. In this study, we focused on high performance of diesel engine with NiFe 2 O 4 nanosheets. Various conditions such as catalyst dosage, hydrogen peroxide dosage, frequency range and catalyst morphologies of NiFe 2 O 4 were investigated to achieve optimized conditions. High levels of sulfur compounds (98%) were removed using NiFe 2 O 4 catalysts under determined conditions (1.0 g L -1 catalyst, O/S mole ratio = 2, frequency = 40 kHz and morphology of the nanocatalyst = nanosheets). The nickel ferrite nano additive was mixed with isodiesel and heavy diesel using an ultrasonicator device to achieve better stability. The results indicated that under the optimum amount (1% w/v), the NiFe 2 O 4 nanostructure is the best additive to reduce NO x , CO, HC and smoke emission in diesel engines. Moreover, a change in the flash point and viscosity of diesel fuels was observed with the addition of nanosheets. NiFe 2 O 4 could be recycled 3 times without a significant decrease in catalyst activity.