New design of fiber-optic reflectometer for determining the phase boundary of multicomponent fluid mixtures at high pressures and high temperatures

Weize Wu; Ke, Jie; Poliakoff, Martyn
February 2006
Review of Scientific Instruments;Feb2006, Vol. 77 Issue 2, p023903
Academic Journal
A dynamic synthetic method based on an optic fiber sensor has been developed to measure phase boundaries of multicomponent fluid at high temperatures >300 °C and pressures >30 MPa. The breakthrough has been the design of the equilibrium cell containing the optic fiber, which gives highly reproducible signals for the phase transition. We demonstrate that this method can clearly distinguish between dew points and bubble points in the phase transitions of mixtures. Overall, the method is characterized by speed, simplicity, high pressures, and high temperatures.


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