FCC Naphtha Hydrotreating

Axens Offer

Axens is the first company to have started up units producing FCC gasoline at 10 wppm sulfur which gives us unrivaled industrial expertise, accumulated from years of experience.

The commercially proven Axens Prime-G+® technology is the market leader for this selective hydrodesulfurization of cracked naphtha.

Prime-G+®: 3 Complementary Pillars Toward Energy Efficiency

Several solutions within three pillars are envisaged to achieve energy efficiency objectives, depending on the specific features of existing units, the local context and project requirements: Catalyst and process optimization, equipment and digitalization.

Commercial Bulletin

Prime-G+®

Prime-G+® stems from Axens' extensive experience acquired in cracked naphtha HDS and selective hydrogenation of LPG and gasoline. Although the naphtha splitter may be optional depending on the required HDS severity, the association of a Prime-G+® selective hydrogenation unit (SHU) with a splitter for light naphtha desulfurization and sweetening ideally complements the selective HDS on the heavier fraction.

Within the preferred arrangement, the "Prime-G+® 1st Step" produces an olefin-rich light cracked naphtha (LCN) and the sulfur-rich heavy cracked naphtha (HCN) is sent to the selective HDS to maximize octane retention.

Prime-G+® offer is particularly flexible allowing different process configurations to best fit the gasoline pool requirement and also maximize refinery profitability.

The first step of Prime G+® technology feature is in offering excellent preparation for the feed of the light gasoline etherification (TAME / TAEE) unit. The TAME/TAEE process ideally complements Prime-G+® technology in compensating for the octane loss and regaining the octane barrels.

Over 300 Prime-G+® units have been licensed

The total licensed capacity exceeds 7,350,000 BPSD making Prime-G+® the leading technology for cracked naphtha desulfurization

Commercial Bulletin

Related Offer

Modular Unit

Prime-G+® and Polyfuel®

One other technology features of the Prime G+® is, being coupled with Axens’ Polyfuel® technology, to offer the possibility to turn Olefinic feedstock into high value Products. LPG and LCN Upgrading towardistillates while maintaining good quality gasoline.

Prime-G+® and GT-BTX® Plus

Axens and Sulzer-GTC have signed an alliance in order to offer a combined solution with the Prime-G+® and the GT-BTX® Plus technology to convert the FCC gasoline into high value products for the gasoline and the petrochemical segments.

The combination of Prime-G+® and GT-BTX PluS® offers a unique solution to reduce octane loss to a very low level for the gasoline pool. On the other hand, it provides refiners the option of converting FCC gasoline into petrochemical products – BTX and additional propylene.

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OATS™

OATS™ is a simple fixed bed process operating under mild conditions without hydrogen and using a low cost resin TA 801 catalyst. The OATSTM process can be designed to ensure a continuous operation between two FCC turnarounds.

This process has been proved in industry and offers major advantages over competing technologies such as higher octane retention and lower RVP of the gasoline product with no need for hydrogen and low cost metallurgy equipment allowing the retrofitting of idle isomerization or etherification plants.

The main types of reaction take place over TA 801 catalyst used in the process:

Sulfur Shift Reactions
Olefins Shift Reactions
Desulfurization Mode
Oligomerization Mode

Production of Ultra Low Sulfur IBP-100°C cut

Reduced HDS unit size and H2 consumption in HDS

Octane retention

Related Offer

Modular Unit

Catalysts

FCC Gasoline Selective Desulfurization Catalysts

HDS catalysts are adapted to fit customer schemes with the objective of deep desulfurization with minimum olefins saturation, ensuring octane retention while matching FCC turnaround schedules.

Catalysts

Oligomerization Catalysts

Oligomerization technologies achieve high conversions of light olefinic fractions into higher value gasoline and middle distillates in association with dedicated catalysts specially developed for these applications.

Gradings

Arsenic Management

Arsenic is by far the most severe poison for Catalysts. Arsenic maximum allowable content on hydroprocessing catalysts during operation, depending upon the service, is in the range of hundreds of wppm.

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.

Adsorbents

Arsine Removal Adsorbents

The poisonous effects of arsine and other metal hydrides on hydrogenation and polymerization catalysts is well documented. By far the most common, arsine can seriously deactivate the high-activity Ziegler Natta, metallocene and noble metal catalysts used for processing cracked light ends.

Adsorbents

Chloride Removal Adsorbents

Chloride is important in both catalytic reforming and isomerization as it helps to maintain catalytic activity over time. However, as chloride is continuously fed into these units, it also has to exit.

Adsorbents

Drying Series Adsorbents

Water removal applications are widely encountered in the industry sector. Activated alumina and molecular sieves stand at the forefront of the several different materials available on the market.

Adsorbents

Mercury Removal Adsorbents

Mercury removal from hydrocarbons is crucial due to HSE-related issues, corrosion problems and downstream catalyst poisoning.

Adsorbents

Purification Series Adsorbents

Material specially developed to achieve your feedstock’s specification requirements.

Adsorbents

Sulfur Removal Adsorbents for Oil, Gas & Petrochemicals

Hydrogen sulfide (H₂S), COS, mercaptans or sulfides are common contaminants that must be removed from various gases and liquids such as natural gas, NGLs, LPGs, cracked gases, olefins or biogas.

Furnaces

Furnace(s) is a key equipment considering the need for optimal operation of unit. Thanks to an extensive design experience with feedbacks from operators and a complete knowledge of this process, Heurtey Petrochem Solutions provides an unparalleled service such as these following features:

High fuel efficiency (94%+) depending on fuel S level
Fully Modularized
Lowest Emission (95%+ reduction with emission reduction technology)
Optimized Plot Plan

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Consulting, Studies & Audits

Axens offers a customized approach, including tailored studies, audits and consulting services, covering technical and operational challenges.

Unit Revamps & Retrofits

You face many challenges, which include operating in a safe, reliable and environmentally sound manner while responding to changing markets dynamics.

Modular Units

A modularization strategy offers superior benefits versus on-site manufacturing. During the last 40 years, Axens has supplied over 500 modular units, both onshore and offshore, providing tailor-made designs according to client project specifications.

Customer Training

Designed for all Axens technologies, dedicated to operators & engineers, Axens offers customized training solutions to all our licensees, covering the whole range of Axens technologies.

Technical Support & Performance Management

Axens is fully committed to be your partner and provide assistance and support during your project lifecycle, from conception to start-up & running operations.

Digital Services & Applications

Axens' digital platform combines real-time data and digital solutions to optimize operations, reduce environmental impact, and lower costs while maximizing profitability. By delivering actionable insights and detailed performance reports, it enhances asset operation and performance for smarter, more efficient outcomes.

Reactor Internals

In today’s complex environment, refineries and petrochemical plants around the world need advanced solutions to reach operational excellence. In units featuring fixed-bed reactors, the use of high-efficiency reactor internals are essential to help achieve this goal.

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Upcoming Events

31 Aug - 03 Sep

Conference

Grapevine, Texas - Central Standard Time

4 Days

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2026 AFPM Summit

The Summit delivers world-class technical sessions dedicated to improving plant-wide performance in the refining and petrochemical industries. Join and network with dedicated industry subject matter experts in Grapevine to discover the latest strategies and emerging innovations, and find immediate solutions to implement at the site level. With over 70 sessions, we guarantee to deliver the curriculum you need to succeed.