Analysis of H₂, O₂, N₂, CH₄, CO, CO₂ and C1-C8 Hydrocarbons Through High Resolution Chromatography

APPLICATION # 170

The Analysis

This GC is used to analyze H₂, O₂, N₂, CH₄, CO, CO₂, gases by thermal conductivity detection. Additionally, this GC simultaneously analyzes complex mixtures of C1-C8 hydrocarbons with high resolution hydrocarbon type capillary column.

How It Works

A single injection introduces the sample into two different column systems, a and b:

1. The sample enters a molecular sieve column and a porous polymer column in series. The compounds are detected by a TCD detector. Hydrogen, oxygen (argon), nitrogen, methane, and carbon monoxide emerge from the column between 1-4 minutes depending on column temperature. At 5.0 minutes, a valve is switched and CO₂ elutes at 6.5 minutes.

2. The remainder of the sample enters a 100-meter column connected to an FID detector. The first compound eluted is methane at 8-9 minutes.

At the time of methane elution or after CO₂ elution, the oven can be temperature programmed at the desired rate to separate the hydrocarbons in the capillary column. The separation of C4's can be performed under cryogenic temperature programming.

Other Uses

1. Analysis of impurities in the production of MTBE

2. Refinery Gas Analysis C1-C12

3. Extended natural gas analysis C1-C20 as well as permanent gases.

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