The characteristic microstructures of supercritical fluids, such as density fluctuation near the critical point, in reaction fields induced by low-temperature plasma were investigated by using Raman spectroscopy. It was found that the decrease in the density of CO2 during plasma generation was less than 0.02 g/cm> (critical density of CO 2:0.467 g/ cm3), when compared to the decrease in density of pure CO2 for a wide pressure range from gaseous to supercritical conditions. Moreover, it was experimentally verified that the density fluctuation observed near the critical point persists in the reaction field.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)