Analysis of Paraffins, Olefins, Naphthenes and Aromatics (PONA) in Naphta using Reformulyzer® M4

Importance of the Topic

The group-type analysis of hydrocarbons in naphtha streams is essential for refinery quality control, product classification and blend optimization. PONA profiling supports compliance with regulatory specifications and informs process adjustments in real time.

Objectives and Study Overview

This application note demonstrates the quantitative determination of paraffins, olefins, naphthenes and aromatics in light, medium and heavy FCC or visbreaker naphtha using the AC Analytical Controls Reformulyzer M4. The study aims to validate compliance with EN ISO 22854 and ASTM D6839, achieve rapid analysis in 30 minutes and report weight and volume percentages by carbon number.

Methodology and Instrumentation

The analysis employs capillary and micropacked columns combined with specific traps to separate hydrocarbon classes. A polar column isolates paraffins and naphthenes from aromatics, while an olefin trap captures unsaturated components. The 13X column then distributes saturates by carbon number. Aromatic fractions are eluted on a boiling point column in two stages with intermediate trap backflush steps. The system uses multiple valves and independent temperature programming for traps and columns, enabling a total runtime of 30 minutes.

Main Results and Discussion

Tests on gravimetric blends and certified FCC naphtha reference materials produced clear chromatographic separation of saturates, olefins and aromatics. Weight and volume profiles by carbon number were consistently within specification limits. Typical reports list group percentages and carbon number distribution, demonstrating the method s precision and accuracy.

Benefits and Practical Applications

The Reformulyzer M4 offers:

• Full compliance with key standards EN ISO 22854 and ASTM D6839
• Fast 30-minute PONA analysis
• High precision and reproducibility
• Wide analytical range covering C4 to C12 hydrocarbons
• Automated reporting of weight and volume percentages

Future Trends and Possibilities

Emerging developments may include integration of real-time data analytics, further miniaturization of trapping elements, expanded applications to biofuel streams and continuous online monitoring. Advances in software algorithms and artificial intelligence could enhance peak deconvolution and efficiency.

Conclusion

The AC Analytical Controls Reformulyzer M4 delivers rapid, accurate and standards-compliant PONA analysis for naphtha streams. Its advanced column and trap configuration ensure reliable quantification of hydrocarbon groups and support refinery process control.

Reference

• ASTM D6839
• EN ISO 22854
• ASTM D5443
• IP 566
• SH/T 0741
• GB/T 28768-2012