A flow calorimeter for the measurement of the isothermal Joule-Thomson coefficient of gases at elevated temperatures and pressures. Results for nitrogen at temperatures up to 473 K and pressures up to 10 MPa and for carbon dioxide at temperatures up to 500 K and pressures up to 5 MPa

A new flow calorimeter for the measurement of the isobaric enthapy increment and the isenthalpic Joule–Thomson effect. Results for methane and (methane + ethane)

“…In order to determine an isothermal enthalpy change, very precise controlling instrumentation is needed, because additional heating must compensate exactly for the Joule-Thomson cooling. (9) The alternative solution of operation inside a thermostat cannot be extended to the high-temperature range desired for the present investigation due to limitations of the thermostat fluid. The application of an external air bath is also impractical because of the poor thermal conductivity of air.…”

Influences of Hydrogen Blending on the Joule–Thomson Coefficient of Natural Gas

“…The J−T coefficients of ethanol, benzene, and cyclohexane vapors at different temperatures and pressures were measured in their study. Cuscóet al 15 applied an improved flow calorimeter to measure the J−T coefficients of N 2 and CO 2 at high temperature and high pressure. Ernst et al 16 measured the J−T coefficients of CH 4 , CH 4 −C 2 H 6 mixture, and natural gas at different conditions, and the experimental results provide an important reference and contribute to the experimental basis for the formulation of an EOS.…”

“…Accurately calculating the J–T coefficient of the natural gas–hydrogen mixture and revealing the influences of hydrogen blending on the J–T effect are of great importance. At present, the widely used methods for predicting the J–T coefficient include experimental measurement, − pressure–enthalpy chart, empirical formula, molecular simulation, − theoretical calculation using equation of state (EOS), − etc.…”