pyrolysis gasoline

The main products are ethylene, propylene, Mixed C4 and pyrolysis gasoline.

Pyrolysis gasoline or Pygas is a naphtha-range product with a high aromatics content.

Oil refineries also produce various intermediate products such as hydrogen, light hydrocarbons, reformate and pyrolysis gasoline.

About 70 percent of the global production of benzene is by extraction from either reformate or pyrolysis gasoline.

The BTX aromatics can be extracted from catalytic reformate or from pyrolysis gasoline by many different methods.

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.

Pyrolysis gasoline can be blended with other hydrocarbons as a gasoline additive, or routed through an extraction process to recover BTX aromatics (benzene, toluene and xylenes).

The pyrolysis products (containing 36% ethylene, 15% propylene, 9% 1-butene and butadiene and an additional 15% pyrolysis gasoline) are separated to obtain monomers used in the production of polyolefins.

Raw Pyrolysis Gasoline, RPG or Raw Pygas is unhydrogenated Pygas which is rich in Benzene.

Another process for producing BTX aromatics involves the steam cracking of hydrocarbons which typically produces a cracked naphtha product commonly referred to as pyrolysis gasoline, pyrolysis gas or pygas.

Hydrogenated Pyrolysis Gasoline, HPG or Hydrogenated Pygas is a feedstock of BTX plant for Benzene and Toluene Extraction.

Most isolated (purified) benzene produced in Canada is derived from petroleum sources through catalytic reforming of naphtha, dealkylation of toluene, and separation of pyrolysis gasoline (Hancock, 1975; Allison and Brown, 1977).

The pyrolysis gasoline typically consists of C to C aromatics, heavier aromatics containing 9 to 11 or 12 carbon atoms, and non-aromatic cyclic hydrocarbons (naphthenes) containing 6 or more carbon atoms.

They have been also used in pyrolysis gasoline (benzene) removal from quench water in ethylene plants, although in this application, the constant changing of cartridges can lead to operator exposure to BTX (benzene, toluene and xylene), as well as disposal issues and high operating costs from frequent replacement.