What is DPG process?

What is DPG process?

DPG™ I & II are pyrolysis gasoline hydrogenation technologies. Saturation of the olefins and sulfur removal are required prior to sending the pyrolysis gasoline stream to an aromatics extraction. Both DPG I and DPG II are catalytic hydrogenation processes that occur in separate fixed bed reactors.

What is pygas used for?

Currently, PyGas is generally used as a gasoline blending mixture due to its high octane number. Depending on the feedstock used to produce the olefins, steam cracking can produce a benzene-rich liquid by-product called pyrolysis gasoline.

Where does pygas come from?

Pyrolysis gasoline is produced in an ethylene plant that processes naphtha, butane or gasoil. Pyrolosis gasoline or pygas (C5+ cut) is a liquid by-product derived from steam cracking of various hydrocarbon feedstocks in olefin plants.

Is Pygas a chemical?

Pygas (CAS: 68477-58-7) is rich in Benzene, Toluene and Xylene (BTX). Benzene is a valuable molecule because it used to produce a number of important chemical intermediates for industrial use. Pygas is produced by Dow’s hydrocarbon crackers and is a mixture of hydrocarbon materials of various molecular weights.

How does steam cracking work?

Steam cracking is a petrochemical process in which saturated hydrocarbons are broken down into smaller, often unsaturated, hydrocarbons. After the cracking temperature has been reached, the gas is quickly quenched to stop the reaction in a transfer line exchanger.

What is pyrolysis fuel oil?

Pyrolysis oil, sometimes also known as bio-crude or bio-oil, is a synthetic fuel under investigation as substitute for petroleum. It is obtained by heating dried biomass without oxygen in a reactor at a temperature of about 500 °C with subsequent cooling.

What is naphtha cracking?

In naphtha-based steam-cracking processes, naphtha is first fed into the convective section of the furnace for preheating and vaporization. At elevated temperatures in the radiant section of the furnace (750–900 °C or higher), naphtha is cracked into smaller molecules in the absence of catalysts.

What is cracking severity?

A higher cracking temperature (also referred to as severity) favors the production of ethylene and benzene, whereas lower severity produces higher amounts of propylene, C4-hydrocarbons and liquid products. The process also results in the slow deposition of coke, a form of carbon, on the reactor walls.

Why is cracking needed?

Cracking is important for two main reasons: It helps to match the supply of fractions with the demand for them. Since cracking converts larger hydrocarbons into smaller hydrocarbons, the supply of fuels is improved. This helps to match supply with demand.

Can pyrolysis be plastic?

Significantly, composite materials and mixtures of waste plastics can be processed using pyrolysis-based procedures. Composite materials like plastic-aluminium laminates (PALs) are comparatively challenging for traditional, mechanical-based recycling processes.

What is pygas processing?

Typical Process Flow Diagram (PFD) – Pygas Processing 2 Min Read Pygas is a naphtha-range product with high aromatics content used either for gasoline blending or as a feedstock for a BTX extraction unit. Pyrolysis gasoline is produced in an ethylene plant that processes naphtha, butane or gasoil.

What is driving the global pygas market?

Rise in number of petrochemical plants all across the globe is one of the major factors driving the market of global pygas market. For instance, in April 2017, ExxonMobil, a leading oil and gas company, announced the initiation of petrochemical plant construction in Texas.

What is pygas or pyrolysis gasoline?

During the production of propylene and ethylene from naphtha at high temperature, the by-product obtained is known as pygas or pyrolysis gasoline. Pyrolysis gasoline is a yellow liquid and is colourless in nature and contain highly aromatic contents and high octane number from C5 to C12 and have density lower than the water.

What is pypygas used for?

Pygas is a naphtha-range product with high aromatics content used either for gasoline blending or as a feedstock for a BTX extraction unit. Pyrolysis gasoline is produced in an ethylene plant that processes naphtha, butane or gasoil.