Agilent Refinery Gas Analyzers

Significance of the Topic

Precise and reliable analysis of refinery gas mixtures is critical for process optimization, product quality, and regulatory compliance in petrochemical operations. The wide variation in gas sources and compositions demands instrumentation that can quickly separate and quantify both hydrocarbons and permanent gases.

Objectives and Study Overview

This white paper introduces the Agilent Refinery Gas Analyzer (RGA) product families based on the Agilent 8890 GC and the Agilent 990 Micro GC. It summarizes standard and customizable configurations designed to meet industry methods (ASTM D1946, UOP 539), factory quality control, rapid deployment, and flexible application workflows.

Methodology

Agilent RGAs use multi-channel gas chromatography combining flame ionization detectors (FID) and thermal conductivity detectors (TCD). Core features include microchannel electronic pneumatic control to protect against contaminants, parallel channels for simultaneous separations, and optional auxiliary ovens or integrated microgasifiers. Customized software reporting calculates concentrations in mole, weight, or volume percentages and heat content.

Instrumentation Used

• Agilent 8890 GC system with up to three parallel channels and multi-valve oven options
• Agilent 990 Micro GC system featuring four µTCD channels and micromachined injectors
• Detectors: FID for hydrocarbons; dual or triple TCD channels for permanent gases and hydrogen
• Columns: capillary PLOT, packed, micropacked, and WCOT chemistries
• Software: OpenLab CDS for instrument control, data acquisition, and reporting

Main Results and Discussion

• The 8890 Fast RGA achieves C1–C5 hydrocarbon separations in six minutes, conforming to ASTM D1946 and UOP 539, with detection limits around 100 ppm.
• Optional third TCD channel enables linear hydrogen analysis using nitrogen or argon carrier gas.
• The 990 Micro GC RGA completes a full refinery gas profile in under 180 seconds, ideal for field and low-concentration samples.
• Factory calibration, chemical and leak testing, and onsite checkout ensure rapid startup and method reliability.

Practical Benefits and Applications

• Streamlined installation with preloaded methods and consumables included reduces setup time.
• Intelligent system health monitoring and mobile access allow remote troubleshooting, preventive maintenance, and leak detection.
• Customizable configurations support specialized streams such as flue gas, extended hydrocarbons, and sulfur-containing gases.
• Complete GC workflow support includes QuEChERS and SPE kits, automated sample preparation, and inert flow path solutions for consistent low-level detection.

Future Trends and Opportunities

Integration of AI-driven diagnostics, expanded multidimensional GC techniques, and enhanced connectivity will further reduce downtime and improve data quality. Portable micro GC systems will continue to advance on-site process monitoring, while green analytical methods and digital twins will shape next-generation refinery analytics.

Conclusion

Agilent Refinery Gas Analyzers deliver fast, accurate, and reliable data for complex refinery gas streams. Factory-tested configurations, advanced GC technologies, and comprehensive support streamline analysis workflows, optimize processes, and ensure product quality across the petrochemical industry.

References

• ASTM D1946: Standard Test Method for Analysis of Petroleum Products by Gas Chromatography
• ASTM D1945: Standard Test Method for Gases in Hydrocarbon Matrices by Gas Chromatography
• UOP 539: Analysis of Hydrocarbons by Gas Chromatography