Applications

Analyzer Description

Configuration:

6-valve, 6-columns (packed and capillary), TCD / TCD / FID

Sample type:

Natural gas, sour gas, other refinery gases

Components separated:

C₁ – C₇, hydrogen, carbon dioxide, hydrogen sulfide, oxygen, nitrogen, carbon monoxide

Additional column for heavy hydrocarbon separation up to C₁₂

Lower detection limits:

20 ppm for hydrocarbons, 100 ppm for permanent gases, 500 ppm for H₂S, 400 ppm for carbon monoxide

Methods met:

ASTM D1945, ASTM D1946, ASTM D7833, UOP 539, Wasson-ECE 783, W2484

Typical Chromatogram

Key Features and Benefits

• The heavy hydrocarbon analysis is performed as a separate run or delayed injection
• Can upgrade with an additional FID for a single injection analysis (Wasson-ECE 783D)
• Liquid valves can be added for LPG analysis
• The backflush peak can be tailored to specific samples (e.g. C₆+ or C₈+ backflush composite peaks)

Refinery Gas Literature (PDF)