Use of HPLC to monitor olefins, dienes, and aromatics in the dehydrogenated products of higher n-paraffins

ABSTRACT

The linear higher olefins are generated through catalytic dehydrogenation of long-chain linear paraffins. During the catalytic dehydrogenation, a variety of dienes and aromatics are also formed. These side products not only cause coking of the catalyst, but also hamper in the reaction course of olefins with other substrate. A method has been developed based on the High-Performance Liquid Chromatography with Refractive Index detection for simultaneous estimation of olefins, dienes, and aromatics in the catalytic dehydrogenated product of model compound decane. The application of method for monitoring of the dehydrogenated stream from C10-C14 n-paraffins has also been discussed.

KEYWORDS:

• Catalytic dehydrogenation
• coke formation
• dienes
• high-performance liquid chromatography
• olefins
• paraffin

Acknowledgements

The authors are thankful to Dr Sujit Mondal(Senior Research Officer, IOCL) for recording NMR spectra. The authors are also thankful to IOC R&D management for their permission to publish this work.