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Pyrolysis Gasoline Hydrogenation Unit (PGHU) with a capacity of 164 KTPA is licensed from Linde AG, Germany.

The RPG stream is hydrogenated in PyGas Hydrogenation Unit to produce C₆-C₈ stream and Pyrolysis Gasoline. 

Fully hydrogenated C₅ cut is recycled back to the Cracker, and so is the C₆ Raffinate produced from Benzene Extraction Unit.

The C₆-C₈ stream is sent to Benzene Extraction Unit (BzEU) for the recovery of Benzene, to be sold as a final product.
This stream is Benzene depleted PyGas having Benzene content less than 1.5% and is single hydro treated.
It is a naphtha range product with a high aromatic content used for gasoline blending or feedstock for BTX extraction unit.

Heavy PyGas (HPG) is the product available for sale.

Source: ONGC Petro additions Limited (OPaL), Jul 2021, Information Memorandum.