Hydrocarbon analyzer and method of analyzing hydrocarbon

Details Hydrocarbon analyzer and method of analyzing hydrocarbon Hydrocarbon analyzer and method of analyzing hydrocarbon

1993-08-24

1995-02-28

Williams, Hezron E.

Measuring and testing

Gas analysis

Gas chromatography

422 89, G01N 3040

Patent

active

053926340

ABSTRACT:
A hydrocarbon analyzer for rapidly measuring both methane and nonmethane hydrocarbons is provided. The analyzer includes a nonmethane hydrocarbon absorbing first column connected in series with a methane absorbing second column. A sample gas is propelled in a carrier gas through a carrier gas line into the first and second columns via a change-over valve for switching between a branched line severably connected between the carrier gas line and a first flame ionization detector for measuring nonmethane hydrocarbons and a second flame ionization detector connected to the second column for measuring methane. The change-over valve switches from a gas sample introducing position to a backflush position so that the sample gas is introduced into the first nonmethane hydrocarbon absorbing column where the nonmethane hydrocarbons are absorbed and the methane is transferred to the second methane absorbing column prior to backflushing the carrier gas to elute the absorbed hydrocarbons which are directed to the first and second hydrogen flame ionization detectors.

REFERENCES:
patent: 3112639 (1963-12-01), Maxwell
patent: 3206968 (1965-09-01), Leggoe et al.
patent: 3444722 (1969-05-01), Roof
patent: 4521225 (1985-06-01), Jenkins et al.

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