Hyper-Extended Refinery Gas Analysis (RGA)

Analyzer Description

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)