Hyper-Extended Refinery Gas Analysis (RGA) Using Four Detectors

Analyzer Description

6-valve, packed and capillary columns, TCD / TCD / FID / 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 and inlet for heavy hydrocarbon separation up to C12
Lower detection limits:
20 ppm for hydrocarbons, 100 ppm for permanent gases, 500 ppm for H2S
Methods met:
ASTM D1945, ASTM D1946, ASTM D7833, UOP 539, Wasson-ECE 783D, W2484

Typical Chromatogram

TCD Chromatogram

Key Features and Benefits

  • The heavy hydrocarbon analysis is performed at the same time as the other analyses
  • The backflush peak can be tailored to specific samples (e.g. C6+ or C8+ backflush composite peaks)

Refinery Gas Literature (PDF)