Analysis of Iso- and n-Paraffins, Naphthenes, Olefins and Aromatics (PIANO) using Reformulyzer® M4

Significance of the topic

Group type analysis of hydrocarbon streams is essential for quality control and process optimization in refining operations It provides detailed information on saturates olefins naphthenes and aromatics which influence fuel performance and regulatory compliance

Objectives and study overview

This application note describes the quantitative determination of iso and n paraffins naphthenes olefins and aromatics in naphtha and reformate streams using the AC Analytical Controls Reformulyzer M4 in PIANO mode The study aims to deliver rapid high resolution analysis compliant with EN ISO 22854 and ASTM D6839 methods

Instrumentation

The analysis was performed on the Reformulyzer M4 system equipped with capillary and micropacked columns polar pre column olefin and 5A traps a boiling point column and a flame ionization detector Individual heater circuits control trap and column temperatures supporting simultaneous programming of temperature profiles

Methodology

The PIANO method separates hydrocarbon groups via a series of traps and column routes The polar column first separates saturates from aromatics Saturates proceed to olefin and molecular sieve traps while aromatics are retained for sequential boiling point column analysis Traps are desorbed in backflush to release olefins and n paraffins onto the 13X column for carbon number distribution The total analysis time is 40 minutes

Main results and discussion

Analysis of gravimetric blends and a reformate certified reference material showed clear separation of iso parraffins n parraffins naphthenes olefins and aromatics Chromatograms exhibited well resolved peaks and reproducible retention patterns Weight percent and volume percent profiles by carbon number met expected specifications demonstrating the precision and accuracy of the method

Benefits and practical applications

The Reformulyzer M4 delivers fast analysis in under 40 minutes with minimal operator intervention The method meets international standards providing reliable group type data for gasoline reformate feedstocks and blend streams High throughput and broad analytical range support quality assurance process monitoring and regulatory reporting in petroleum and petrochemical laboratories

Future trends and opportunities

Integration of advanced software for automatic data evaluation and reporting will streamline workflows Further development may extend the method to oxygenated fuels bio feedstocks and heavier distillates Online coupling with process units could enable real time monitoring and adaptive process control Innovations in column technology and detector sensitivity will enhance resolution and lower detection limits

Conclusion

The AC Analytical Controls Reformulyzer M4 PIANO method offers a robust rapid and compliant approach for group type analysis of hydrocarbon streams Its combination of capillary and micropacked columns with selective traps ensures detailed profiling of saturates olefins naphthenes and aromatics within a 40 minute runtime