%0 Journal Article %T Analytical Approach to Clusters in near Critical CO<sub>2</sub> %A Boris Sedunov %A Ilia Brondz %J International Journal of Analytical Mass Spectrometry and Chromatography %P 39-50 %@ 2332-1776 %D 2016 %I Scientific Research Publishing %R 10.4236/ijamsc.2016.43005 %X Clusters greatly influence thermophysical properties of near critical gases. The cluster structures of supercritical fluids in general and Carbon Dioxide especially are important for the advanced supercritical fluid technologies and analytics development. The paper extends to near critical densities the developed earlier methods to extract the clustersĄŻ properties from Online Electronic Database of NIST on thermophysical properties of fluids. This Database contains a hidden knowledge of cluster fractionsĄŻ properties in real gases. The discovered earlier linear chain clusters dominate at intermediate densities. Their properties can be extrapolated to high density gases, thus opening the way to study large 3D clusters in near critical zone. The potential energy density of a gas, cleared from the chain clustersĄŻ contribution, reflects only the 3D clustersĄŻ characteristics. A series expansion of this value by the Monomer Fraction density discovers properties of n-particle 3D clusters. The paper demonstrates a discrete row of 3D clustersĄŻ particle numbers and gives estimations for bond energies of these clusters. %K Real Gas %K Supercritical Fluid %K Cluster %K Bond Energy %K Equilibrium Constant %K Potential Energy %K Theoretical and Analytical Approach to Clusters %K Energetic of Clusters %K Clusters in Extraction Process %K Clusters in Analytical Chemistry %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=70565