A New Empirical Correlation for Prediction Water Content of Natural Gas

Determination and separation of water content of natural gas streams is vital in the gas processing and transportation. In this work a thermodynamic model , using Peng-Robinson equation of state, was proposed for the prediction of the water content of natural gas(methane,CH4) in temperature range of 273-733K and pressure range of 0.5 – 34.6 MPa and then the agreement with the experimental data were also examined. The average absolute error was obtained as 3.61%. with the aid of the produced data, general form of the equation for prediction of water content of methane was proposed. The coefficients of the equation were determined by employing GRG Non-Linear method, in the same temperature range as above, to reduce the error furthermore. The proposed equation was also tested and corrected for hydrocarbons heavier than methane with presence of acidic gases.