Search Axens.net

C₅+ Pygas Hydrogenation

Ethylene production by steam cracking produces several by-products such as pyrolysis gasoline (pygas). 

Raw pygas contains highly valuable components such as BTX (benzene, toluene, xylenes), unsaturated compounds like diolefins, styrenes and olefins, and sulfur-containing compounds. In order to recover BTX, the unsaturated compounds and sulfur compounds have to be removed efficiently. This is the target of Axens’ offer through two different stages of pygas hydrogenation : GHU-1 and GHU-2. 

Uzbekneftegaz selects Axens’ advanced technologies for production of Euro V gasoline at Bukhara refinery

Axens has been awarded by Uzbekneftegaz, the Uzbekistan’s state-owned oil and gas company, a Basic Engineering and License contract for the modernization project of Bukhara Oil Refinery. The target of this project is to enable the production of Euro 5 gasoline in compliance with the highest international standards.
As a major licensor in the refining field, Axens has long-standing partnership with Uzbekneftegaz,
accompanying Bukhara Oil Refinery with technical services and catalyst supply for the optimum operation of the plants since the first process units licensed by Axens’ were put in operation in 1997.

Find out more
-
Conference
Oman - GMT+4
4 Days

Green Hydrogen Summit

GHSO 2023 is the largest Green Hydrogen event in the MENA region. Global decision makers in policy, finance, tech and industry will come together for discussions geared towards driving economies of the future and advancing energy solutions that can sustainably meet the energy demands of our growing population.
Low Carbon Hydrogen
LOHC
Olefins Selective Hydrogenation
C₂ Selective Hydrogenation
C₃, C₄, C₅ Selective Hydrogenation
C₅+ Pygas Hydrogenation
Total Hydrogenation
Syngas Production & Upgrading / Hydrogen Production
Process Technologies
C₂ Selective Hydrogenation
C₃ Selective Hydrogenation
C₄ Selective Hydrogenation
Technology for drying and purification
Arsine Removal Adsorbent
Drying Series Adsorbent
Mercury Removal Adsorbent
Selective Hydrogenation Catalysts
Sulfur Removal for Oil, Gas & Petrochemicals Adsorbent
Total Hydrogenation Catalysts
Middle-East
+19

Axens pyrolysis gasoline unit successfully started-up at Hyundai Chemical petrochemical complex in South Korea

Axens and Hyundai Chemical Co. successfully achieve the start-up of the pyrolysis gasoline (Pygas) unit, part of the Hyundai Chemical petrochemical grassroots complex in Daesan, South Korea.

Find out more
Conference
New Orleans - GMT-5
2 days

American Fuel & Petrochemical Manufacturers (AFPM) Summit

The Summit: Excellence in Plant Performance blends AFPM’s traditional refining and petrochemical manufacturing technical curriculum with new creative opportunities that drive excellence in plant performance. Topics and themes throughout the conference will highlight emerging process technologies, process safety, improved reliability and operations, mechanical integrity, training, leadership, and culture.
Petrochemicals
Renewable Fuels & Bio-Based Chemicals
Aromatics Extraction
Extractive Distillation
Liquid Liquid Extraction (LLE)
Benzene Hydrogenation
Benzene Production
Bio Aromatics
Bio Olefins
Bio Ethylene
Bio Butadiene
C₄ Fractionation
Butene-1 recovery
Isobutene Recovery
C₄ Isomerization / Alkylation / Olefins Hydrogenation
C₄ Isomerization
Fluoridric Acid Alkylation
Sulfuric Acid Alkylation
Feed Purification
Solvent hydrogenation
C₄ Upgrading
C₅ Skeletal Isomerization
C₅-C₆ Isomerization
Once-through
Octane Enhancement
Advanced Recycle
Catalytic Cracking
VGO FCC
Resid FCC
High Propylene FCC
Catalytic Reforming
CCR Reforming
Cyclic Reforming
Semi-reg Reforming
Catalytic Reforming
CDU (Crude Distillation Unit)
Cellulosic Ethanol
CO₂ Capture
CO₂ Gas Drying
Cyclohexane Production
Diesel Hydrotreating
EDC Cracking
Etherification
FCC Naphtha Hydrotreating
FCC Naphtha Sweetening
Gas Dehydration & Purification
Solvent Processes
Dew Pointing
Adsorbents
Gas Sweetening
Solvent Based Processes
Cryogenic Processes
Catalytic Processes
Adsorbents
High-conversion Hydrocracking
Kerosene Sweetening / Hydrotreating
Sweetening
Hydrotreating
LNG
LPG Sweetening & Olefins Recovery
LPG Sweetening
Olefins Recovery
Lube Plant
Hydrorefining
Lubes Hydrofinishing
Hydroisomerization & Hydrofinishing
White oils Hydrotreating
Wax Hydrotreating
MEG Recovery
Naphtha Treatment
NGL & Condensates Sweetening
NGL Recovery & Treatment
Olefins Purification
Phenol Production
Oligomerization
Olefins Purification
Ethylene Purification
Comonomer Purification
Propylene Purification
Olefins Removal
Olefins Selective Hydrogenation
C₂ Selective Hydrogenation
C₃, C₄, C₅ Selective Hydrogenation
C₅+ Pygas Hydrogenation
Oligomerization
Heterogeneous Oligomerization
Homogeneous Oligomerization
Oligomerization
Ethylene
Butene
Paraxylene Purification & Production
Phenol Production
Renewable Diesel and Jet
Americas
+93

2nd Stage Gasoline Hydrogenation Unit, GHU-2

In the second stage of pygas hydrogenation (GHU-2) the C6-C8 heart cut is further processed to prepare a feedstock suitable for aromatics recovery, by selectively hydrogenating the olefins and hydrodesulfurization.

This process consists in olefins and sulfur removal from all or a specific fraction of the first stage effluent. The complete removal of olefins and sulfur has to be ensured while minimizing aromatics hydrogenation. The effluent is then routed to an aromatics recovery unit.

Best answer to maximize aromatics recovery as well as diolefins, olefins and sulfur removal

1st Stage Gasoline Hydrogenation Unit, GHU-1

The first stage of the Gasoline Hydrogenation Unit (GHU-1) involves the selective hydrogenation of diolefins and styrenics. Efficiency of the conversion in this stage is essential for the downstream unit’s operation.

The first stage process aims to improve the stability of the raw pyrolysis gasoline by selectively hydrogenating the diolefins and alkenyl compounds, making it suitable for further processing in a second stage. The reaction is carried out mainly in the liquid phase, on a specific catalyst in a fixed bed reactor.

The operating conditions are selected to maximize the conversion of diolefins and alkenyl-aromatics, while minimizing the formation of heavy products by polymerization, preventing any aromatics loss.

In this stage, palladium or nickel-based catalysts are used depending on the site-specific constraints among which the feedstock characteristics, the product specifications, the unit characteristics and the operating conditions.

Long successful history in unit design and high-performance catalysts
References Over 150 references
Gradings

Speciality Bed Topping

In Hydroprocessing reactors, pressure drop is mainly induced by particulates build-up and gum formations. Pressure drop not only affect the capacity of the unit but can also have detrimental impact on the distribution.

Read more
Gradings

Silica Management

Silicon is a well-known widespread poison for hydroprocessing catalysts. The main contributor to silicon is the Delayed Coker. In addition, there is a general tendency in the oil production industry to use more silicon-based flow improvers.

Read more
Gradings

Gums & Polymer formation control

Pressure drop induced by gum formation is frequently encountered in unit processing some cracked feedstock derived from various conversion processes. The olefins and mainly the diolefins contained in these streams tend to polymerize and get oxidized forming a crust which deposit in the upper layers of the reactor.

Read more
Catalysts

Selective Hydrogenation Catalysts

High-performance selective hydrogenation catalysts dedicated to the petrochemical and refining industries, to purify highly valuable olefinic and aromatic streams produced by steam crackers and FCC units.

Read more