The Application of RKS Equation in Calculating Thermo-physical Properties of Natural Gas

The pressure ranges from several to tens of MPa in gas transmission, so the natural gas can not be handled as ideal gas in the property calculation. The method and technique of calculating thermo-physical properties of natural gas using RKS equation are mainly introduced in this paper. The results indicate that RKS equation can meet the needs of engineering calculation of thermo-physical properties of natural gaswell.