[SCG58-P04] Experimental Study of Critical Point Determination for Multicomponent Fluids using light-scattering Spectroscopic Method
Keywords:decision of critical point, multicomponent fluid, supercritical fluid, scatter spectroscopy
Molecules in the supercritical fluid are unevenly distributed and are known to form both high density and sparse molecular regions in the fluid. Such nonuniformity of molecular distribution is called density fluctuation, and this degree becomes maximum at CP of fluid.
Therefore, for pure material such as H 2 O and CO 2, the critical opalescence is spectroscopically observed at the subcritical to supercritical transition. Therefore, if the density variation of the multicomponent fluid can be observed by a spectroscopic method, it is possible to determine the CP value.
The objective of this study is to establish a new measurement technique / procedure for easily determining CP of multicomponent fluid using spectroscopic observation of subcritical / supercritical transition state.