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High pressure cryogenic heat capacity measurements of liquid methane, ethane, propane and their mixtures by differential scanning calorimetery


T. Syed1, T. Hughes1, K. Marsh1 and E. May1

1Centre for Energy, The University of Western Australia, Crawley WA, Australia

Keywords: calorimetry
property: heat capacity
material: methane, ethane, propane

A Setaram BT2.15 DSC calorimeter was modified to allow specialised high-pressure cryogenic differential scanning calorimetery of binary and multi-component liquid hydrocarbon mixtures, similar to those found in an LNG plant. A description of the modifications made to the equipment and the experimental results of Cp measurements of liquid methane, ethane, propane and their mixtures are presented in this work. The experiments were conducted over temperatures between (150 and 273) K at pressures to 6 MPa. We will compare our data, which are critical to the design of the main cryogenic heat exchanger (MCHE) at the heart of the LNG plants, with the predictions of reference equations of state (EOS) and the cubic EOS routinely used in process simulators to design such plants.


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