Speeding Up Your Natural Gas Analysis Using a Micro GC Natural Gas Analyzer

Significance of the Topic

Natural gas composition and quality control are critical for energy production, pipeline transportation and regulatory compliance. Rapid, accurate on-site or in-lab analysis enhances operational efficiency.

Objectives and Study Overview

This study evaluates Agilent’s Micro GC Natural Gas Analyzer in two configurations (Analyzer B and Extended B) for fast, simultaneous separation of hydrocarbons (up to C9) and permanent gases in under 200 seconds. The goal is to demonstrate rapid, robust analysis suitable for laboratory and field deployment.

Methodology and Instrumentation

The analyzer combines micro-machined injection, narrow-bore columns and μTCD detectors across multiple channels.

• Micro GC platform with 1–4 independent channels
• PoraPLOT U column for methane and light gases separation
• CP-Sil 5 CB column (6 m) for C4+ hydrocarbon analysis
• MolSieve 5A column for permanent gas detection (N2, O2, H2, He)
• Backflush configuration to remove high-boiling components and protect analytical columns
• UltiMetal sample path treatment for improved hydrogen sulfide peak shape
• Optional micro gasifier accessory for LNG applications

Main Results and Discussion

Baseline separation of C1–C7 hydrocarbons and key impurities (CO2, H2S) is achieved in 75–100 seconds; C8–C9 up to 400 seconds. Chromatograms demonstrate clear resolution and fast throughput. The extended configuration resolves permanent gases within 120 seconds. Backflush operation effectively reduces carryover and preserves column performance.

Practical Benefits and Applications

• Rapid turnaround of natural gas and related streams analysis
• Compact, portable system for lab and field use
• Integrated reporting tools for heating value and Wobbe index calculation (ASTM, GPA, ISO compliant)
• Enhanced durability with metal-deactivated inlet for corrosive gases
• Expandable configurations to match specific analysis requirements

Future Trends and Opportunities

Advancements may include integration with real-time data analytics, remote monitoring, further miniaturization, enhanced detection sensitivity and expanded analyte libraries for broader energy industry applications.

Conclusion

Agilent’s Micro GC Natural Gas Analyzer provides a versatile, high-speed solution for detailed component analysis of natural gas, ensuring reliable performance and easy deployment in varied operational environments.

Reference

[1] 5991-0275EN; Application Note – Fast Analysis of Natural Gas Using the Agilent Natural Gas Analyzer; 2012.
[2] 5991-0301EN; Data Sheet – Agilent 490 Micro GC Natural Gas Analyzers; 2012.
[3] 5991-1093EN; Brochure – Agilent Analyzers and Application Kits; October 2012.