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The Role of Gas Chromatography in Petrochemical Analysis

Author:JIANGXI AIYI HI-TECH CO., LTD. Click: Time:2025-10-21 13:38:05
This Gas Chromatograph (GC-9800 Series) is designed for refinery gas, natural gas, and hydrocarbon analysis in petrochemical laboratories.

The system supports TCD/FID dual detectors, automatic gas sampling valves, and modular channel design, ensuring precise, stable, and reproducible results for complex gas mixtures.


Equipped with the IBrainChrom chromatography workstation, it provides automated control, data acquisition, and quantitative analysis — meeting international standards for ASTM, ISO, and GPA testing methods.


1. Key Features:
  • Dual detector system (TCD + FID) for simultaneous multi-component analysis
  • High-precision gas flow and temperature control
  • Preconfigured analysis methods for refinery and natural gas applications
  • Optional online analysis module for real-time process monitoring
  • Compact design suitable for both lab and field installations
  • Gas Chromatography in Petrochemical Analysis: Common Configurations and Applications


2. Typical GC Configuration for Refinery and Natural Gas Analysis

To meet the analytical demands of refinery and natural gas composition testing, laboratories typically use GC systems configured with:
  • Dual or Triple Detector Channels — Enables simultaneous analysis of permanent gases and hydrocarbons.
  • TCD (Thermal Conductivity Detector) — Detects permanent gases such as H₂, O₂, N₂, CO, and CO₂ with excellent stability.
  • FID (Flame Ionization Detector) — Analyzes hydrocarbons (C₁–C₆) with high sensitivity and broad linear range.
  • Packed and Capillary Column Combination — Enhances separation performance for both light and heavy components.
  • Automatic Gas Sampling Valve with Sample Loop — Ensures consistent, repeatable sample introduction for gaseous samples.
  • Chromatography Workstation Software — Offers multi-channel data acquisition, real-time chromatogram display, and automated reporting.


3. Application Areas

Gas Chromatography systems are widely used across refineries, natural gas plants, and petrochemical R&D centers.


  • Refinery Gas Analysis (RGA) — Determining the composition of refinery off-gases to optimize production.
  • Natural Gas Composition Testing — Measuring hydrocarbons, BTU values, and the Wobbe Index for quality grading.
  • Hydrocarbon Purity Testing — Monitoring product purity and contamination.
  • LPG Component and Impurity Testing — Quantifying propane, butane, and trace contaminants such as sulfur compounds.


4. Why Choose Our GC Systems for Petrochemical Testing

Our GC-9800 Series Gas Chromatograph is specifically optimized for refinery and natural gas laboratories.

  • High-temperature stability and accurate flow control
  • Flexible multi-detector configuration (TCD/FID or TCD/FID/ECD)
  • Factory-calibrated methods for ASTM and ISO testing standards
  • Optional integration with online monitoring systems
  • Powerful IBrainChrom data system with traceable reporting


With these features, laboratories can achieve precise, repeatable, and regulation-compliant results while minimizing operational complexity.


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