L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Patrick Mauvais

Jean-Marc Girard

James J McAndrew

David Carteau

M&eacute;lanie Bartolomey

The invention relates to a gas sampling device for a filling station for hydrogen tanks, said device comprising a circuit comprising a first upstream end provided with an inlet connector to a detachably connected to an outlet connector of a filling station, and two conduits respectively for sampling and filling connected in parallel to the inlet connector, the sampling conduit comprising a valve system, a first pressure reducing valve and a container for collecting a sample of gas expanded by said first pressure reducing valve, and the filling conduit comprising a downstream end provided with a first outlet connector to a detachably connected to an inlet connector of a tank to be filled.

Gas sampling device and filling station comprising such a device

Provided is a process for measuring the amount of impurities in a gas sample filling a laser absorption spectroscopy analysis cell. The process includes calculating the value of a characteristic representative of the absorbance of the gas sample, from a measurement of the gas sample at a single given pressure, and quantifying the impurities on the basis of a predetermined law for the variation of the characteristic as a function of the amount of impurities. The characteristic is the ratio of the difference between the luminous intensity (I ) of a light beam transmitted through the gas and the luminous intensity (I ) of the incident beam to the luminous intensity (I ) of the incident beam. The impurities are quantified on the basis of a value of the coefficient of proportionality between the amount of impurities and the characteristic, determined on the basis of a table of variation of the characteristic as a function of pressure, for a given amount of impurities.

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Auffargis, France

Patrick Mauvais