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Benzene Hydrogenation

Benzene hydrogenation downstream of the reformer offers a reliable solution for benzene control without compromising reformer severity. As a result of a long experience in the field of hydrogenation, Axens offers the cost effective Benfree® technology to saturate benzene.

Axens has developed two configuration options: Benfree® C and Benfree® RD to address operator requirements in terms of performance, flexibility, reliability and cost. This is typically the selected option for moderate to high benzene reduction requirements.
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Benfree® C

When limiting the benzene formation in the reformer is not sufficient to meet gasoline pool specifications, Benfree® C engineering design services will provide a reliable solution to adjust the benzene saturation to requirement. The conventional option consists of a hydrogenation unit downstream of a reformate splitter to saturate the benzene contained in the light reformate stream. The unit utilizes a highly active catalyst that is operated in the liquid phase under mild conditions to minimize investment cost.

Minimize toluene carry-over in the light reformate sent to the hydrogenation reactor to maximize octane retention
Maximize overall benzene conversion by limiting the benzene content in the heavy reformate stream
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Benfree

Benfree® RD

The Benfree® RD integrates an external fixed bed hydrogenation reactor with the reformate splitter column, therefore reducing equipment and associated costs to save capital cost and plot area. The light reformate product is withdrawn as a side draw of the column for RVP control. Operating conditions are adjusted to minimize the toluene carry-over to the hydrogenation reactor thus minimizing the octane loss.

Simple integrated reactive distillation concept which ensures a high level of benzene saturation with great operation flexibility
Easy catalyst loading and change-out in a conventional fixed bed instead of proprietary catalytic structured packing
Continuous splitter operation even if the reactor is shutdown to meet market demand or fluctuations
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Benfree

Solvent hydrogenation

Axens’ Solvent hydrogenation unit uses a highly active catalyst and operates in the liquid phase under mild conditions to minimize the investment and operating cost.

The Axens Solvent Hydrogenation technology covers alternative configurations, with main reactor and/or a polishing reactor as function of the expected specifications

Mild operating condition limiting capital expenditure allowing the use of carbon steel
Liquid phase hydrogenation Limit the use of utility to vaporize the feedstock, saving operating cost & reducing the environmental impact
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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.

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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.

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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.

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

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Unit Revamps & Retrofits

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

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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.

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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.

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

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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.

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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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