Speed of Sound Data and Related Models for Mixtures of Natural Gas Constituents

摘要

Sound speed data have been obtained for thirteen binary mixtures and four multicomponent mixtures of natural gas components using a cylindrical cavity. These data cover a temperature range from 250 to 350 K at pressures to 10 MPa. The uncertainty in the data is approximately 0.05 percent. The binary mixtures are primarily methane-rich, with ethane nitrogen, carbon dioxide, or propane as the second component. The multicomponent mixtures are representative of commercially available compositions in the United States and Europe. The data were used to develop and test mathematical models for prediction of the sound speed of natural gas mixtures, within an average uncertainty of 0.1 percent, over the ranges of pressure, temperature, and composition that encompass the major region of custody transfer for natural gas.