Measuring non-methane hydrocarbon contents in gases

Details Measuring non-methane hydrocarbon contents in gases Measuring non-methane hydrocarbon contents in gases

1977-06-15

1978-07-25

Serwin, R. E.

Chemistry: physical processes

Physical processes

Crystallization

23232E, 23254E, G01N 3110, G01N 3112, B01D 5316

Patent

active

041026489

ABSTRACT:
The sample gas is divided into two portions, one being subjected to flame ionization detection to measure all hydrocarbons, the other one being passed through a tube having active carbon to remove all higher hydrocarbons by adsorption except methane. The resulting gas is also subjected to flame ionization detection and the difference in detection gives the non-methane impurities, either electrically as difference signal or graphically. The adsorber tube may be exchanged for another one while the former is cleaned and purged. A simple flame ionization detector is used alternatingly or two are operated in parallel to obtain the two readings.

REFERENCES:
patent: 4042332 (1977-08-01), Saitoh et al.

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