فهرست نشریات علمی دسترسی آزاد ایران

Water-oil emulsification, especially in steam turbine engines, is very common and degrades the performance characteristics of oils, causing salting, clogging of pipes, and apparatus corrosion due to water salts. This work will be interested in the effect of adding nano-clay on the prevention of emulsification for Iraqi turbine oils, enhancing the separation of water from oil. Turbine oil 4006 was oxidized at 150°C for different periods (0, 2.5, 5, 10, and 15 hours) and the emulsification characteristics by the ASTM D 1401 method were researched. The results are that with the prolongation of oxidation time, the emulsification layer is increased, and the separation of water and oil is delayed. Base oil 60 was also oxidized at 120°C for 3 hours. In these, nano-clay treatments at 0%, 1%, 2%, and 4% w/w were given. Addition of nano-clay reduced the emulsification layer and enhances the water separation mainly with 4% nano-clay treatment. Comparison between the two oils revealed that base oil 60 exhibited faster water separation than turbine oil. Treatment with nano-clay reduced the surface tension of both the oils and coalesced the water droplets more, thus enhancing the efficiency of separation. These findings imply that nano-clay could be used as an efficient demulsifier for improving the performance of turbine oils.