Effect of Nanoparticles on the Thermal Stability and Reaction Kinetics in Ionic Nanofluids

Abstract

Nowadays, the incorporation of nanoparticles into thermal fluids has become one of the most suitable strategies for developing high-performance fluids. An unconventional improvement of thermo–physical properties was observed with the addition of 1% wt. of nanoparticles in different types of fluids, such as molten salts, allowing for the design of more thermally efficient systems using nanofluids. Despite this, there is a lack of knowledge about the effect that nanoparticles produce on the thermal stability and the decomposition kinetics of the base fluid. The present study performs IR- and UV-vis spectroscopy along with thermogravimetric analysis (TGA) of pure nitrate and nitrate based nanofluids with the presence of SiO2 and Al2O3 nanoparticles (1% wt.). The results obtained support that nanoparticles accelerate the nitrate to nitrite decomposition at temperatures below 500 °C (up to 4%), thus confirming the catalytic role of nanoparticles in nanofluids.

Thermophysical Properties of Nanocolloids and Their Potential Applications

“…Several articles were received, and with the help of our experienced reviewers, 10 papers were selected for publication [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. From a statistical data perspective, the reader should note that the articles had already received 29 citations and 9243 visualizations at the time of the writing of this Editorial.…”

“…The authors’ results indicate that by adding a small amount of nanomaterial to the ionic liquid, the nanofluid thermal conductivity can be improved. Other papers addressed different types of nanofluids, such as zinc oxide [ 8 ] or graphene [ 4 ], and base fluids, such as PEG 400 [ 8 ] or ionic liquids [ 5 ]. An interesting paper explored the results of an experimental and theoretical study of the two-photon-assisted SRMS in Ag and ZnO nanocolloids in the nanosecond-to-picosecond pulse width domain [ 10 ].…”