Agilent 490 Micro GC Natural Gas Analyzers - Data Sheet

Significance of the Topic

Natural gas composition and heating value determination underpin economic transactions, process control, and quality assurance across the energy industry. Rapid, reliable analysis ensures accurate billing, compliance with regulatory standards, and optimized downstream operations.

Study Aims and Overview

This overview presents the Agilent 490 Micro GC Natural Gas Analyzers as a turnkey solution for field and laboratory settings. It discusses available system configurations, performance metrics, and software tools for calorific value calculations.

Methodology

• Micro GC architecture with one to four independent channels, each combining a micro-machined injector, narrow-bore capillary column, and micro-thermal conductivity detector.
• Electronic carrier gas control for stable flow rates and reproducible retention times.
• Heated sample lines and injectors (up to 110 °C) to prevent condensation and ensure sample integrity.
• Backflush functionality on selected channels to remove moisture, CO₂, and heavy hydrocarbons, preserving column performance.

Used Instrumentation

• Agilent 490 Micro GC platform in dual or quad channel cabinet configurations.
• Column options: HayeSep A, PoraPLOT U, CP-Molsieve 5A (with retention time stability), and CP-Sil 5CB.
• UltiMetal–treated sample path for hydrogen sulfide analysis.
• Optional Micro-Gasifier for LPG/LNG sample introduction and high-pressure reduction.

Main Results and Discussion

Analytical tests demonstrate high repeatability (<0.5% RSD) and fast cycle times: 75–100 s for C₆–C₁₀ and up to 400 s for C₉/C₁₂ analyses. The system reliably quantifies methane, higher hydrocarbons, permanent gases (e.g., CO₂, N₂), hydrogen sulfide, and various gas mixtures under pressures up to 68 bar. Software-controlled operations yield stable retention times and minimal carryover between runs.

Benefits and Practical Applications

• Complete, factory-tuned solution enabling rapid deployment with pre-loaded methods.
• User-friendly interface requiring minimal operator training.
• Fast chromatographic cycles support real-time process monitoring and quality control.
• EZReporter software integration for automated calorific value/BTU calculations and compliance with GPA 2172, ASTM D3588, and ISO 6976 standards.
• Portable configurations and accessory options extend applicability to field analysis and mobile labs.

Future Trends and Opportunities

Advancements in microfabrication and detector technology may further shorten analysis times and reduce footprint. Integration with digital twins, IoT connectivity, and machine learning–driven data interpretation will enhance process automation, predictive maintenance, and decision support in natural gas operations.

Conclusion

The Agilent 490 Micro GC Natural Gas Analyzers deliver robust, high-throughput gas composition analysis with configurable hardware and software solutions. They offer end-to-end workflows from sample intake to calorific value reporting, supporting diverse industrial and regulatory needs.

Reference

• [1] Remko Van Loon; Fast Analysis of Natural Gas Using the Agilent 490 Micro GC Natural Gas Analyzer; Application Note; April 2012.