Pyrolysis gasoline

Short description: Naphtha-range product with high aromatics content

Pyrolysis gasoline or Pygas is a naphtha-range product with high aromatics content.[1] It is a by-product of high temperature naphtha cracking during ethylene and propylene production. Also, it is a high octane number mixture that contains aromatics, olefins, and paraffins ranging from C5s to C12s. The mixture has a CAS Number: 68477-58-7. PyGas has high potential for use as a gasoline blending mixture and/or as a source of aromatics. Currently, PyGas is generally used as a gasoline blending mixture due to its high octane number.[2] Depending on the feedstock used to produce the olefins, steam cracking can produce a benzene-rich liquid by-product called pyrolysis gasoline. Pyrolysis gasoline can be blended with other hydrocarbons as a gasoline additive, or distilled (in BTX process) to separate it into its components, including benzene.

## Raw Pyrolysis Gasoline

Raw Pyrolysis Gasoline (RPG) or Raw Pygas is unhydrogenated Pygas which is rich in benzene.

## Hydrogenated Pyrolysis Gasoline

Hydrogenated Pyrolysis Gasoline (HPG) or Hydrogenated Pygas is a feedstock of BTX plant for benzene and toluene extraction.[3]

## References

1. ↑ PYGAS (Pyrolysis Gasoline)
2. ↑ Ali, Javed (March 24, 2012). "The hydrogenation of pyrolysis gasoline (PyGas) over nickel and palladium catalysts". https://eleanor.lib.gla.ac.uk/record=b2941115.
3. ↑ Communications, Chevron Phillips Chemical Company, Corporate. "Hydrogenated Pyrolysis Gasoline (HPG)". http://www.cpchem.com/bl/olefins/en-us/Pages/HydrogenatedPyrolysisGasolineHPG.aspx.

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