G - Physics – 01 – N
Patent
G - Physics
01
N
73/57
G01N 21/84 (2006.01) G01N 21/45 (2006.01) G01N 21/21 (2006.01)
Patent
CA 1245878
"PRECISE DETERMINATION OF THE COMPRESSIBILITY FACTOR OF A GAS FROM REFRACTIVE INDEX MEASURE- MENTS" Abstract of the Disclosure A method and an apparatus for the precise deter- mination of the compressibility factor of a gas sample are disclosed. Two grating interferometers are coupled toget- her with one interferometer defining a refractive index interferometer adapted to provide a signal of information related to the refractive index of the gas sample and the other interferometer defining a pressure interferometer adapted to provide another signal of information related to the pressure of the gas sample whereby to permit measurement of the refractive index as a function of pressure. Each interferometer is capable of dividing a linearly polarized monochromatic laser beam into a measuring beam and a reference beam and causing the measuring beam and reference beam to travel along res- pective optical paths extending in close parallel rela- tionship over predetermined optical path lengths. The refractive index interferometer and pressure interfero- meter comprise respectively two optical cells in tandem alignment and a single optical cell with each cell having elongated measuring and reference compartments arranged in close parallel relationship along the parallel optical paths of the measuring beam and reference beam to receive same therethrough, the measuring compartments of both cells of the refractive index interferometer being inter- connected to permit gas expansion therebetween with the measuring compartment of one of the cells being connected - 1 - to the measuring compartment of the single cell of the pressure interferometer via a pressure equili- brium chamber to provide the interferometer coupling. The expansion technique enables one to obtain accurate values for higher order terms of the Lorentz-Lorenz equation. This technique combined with the absolute measurements of the refractive index as a function of pressure leads to values of the compressibility factor comparable to the best PVT values, in a much shorter time as compared to other methods. - 2 -
498839
Achtermann Jurgen H.
Bose Tapan K.
St-Arnaud Jean-Marie
L'universite Du Quebec A. Trois-Rivieres
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
LandOfFree
Precise determination of the compressibility factor of a gas... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Precise determination of the compressibility factor of a gas..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precise determination of the compressibility factor of a gas... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1220779