Nitrogen Rejection Units

  • Fives Cryogenics Application Nitrogen Rejection Units (1)-FIVES

Why remove Nitrogen ?

Considered as a major energy source, natural gas extracted from earth as a raw material, needs to be treated and purified before being used by industries and customers. Nitrogen is one of the major contaminants which must be removed through Nitrogen Rejection Units (NRU) as it lowers the calorific value of the natural gas and increases its transport volume.

U.S. government's Energy Information Administration predicts that by 2035, 46% of the Unites States' natural gas supply will come from shale gas.

Which equipment for this application ?

In order to remove nitrogen, a common choice on large-scale sites is to send the natural gas stream through a Nitrogen Rejection Unit (NRU).  The NRU uses the difference in boiling points of methane (−161.6°C) and nitrogen (−195.69°C) to separate the contaminant from the desired natural gas stream. Brazed aluminum heat exchangers (BAHX) are required to cool the process fluids down to the extremely low temperatures required for this cryogenic distillation. They are also used as condensors and reboilers on the distillation columns.

Why Fives ?

Fives designs and manufactures high performance brazed heat exchangers which are perfectly dedicated to NRU in the natural gas processing industry. Within its Cryogenics | Energy business line, Fives accompanies its customers all along their projects to ensure that the designs meet a project’s specific needs. Fives’ brazed heat exchangers are specially developed to handle up to 20 different fluids, with pressures varying from low to very high pressure. Fives’ dedicated design and R&D engineers also optimize the design of complex brazed heat exchangers and continuously improve the equipment performance thanks to in-house software, renowned for mechanical and thermal simulation.

⇒ For recruitment-related matters (application, etc.), please do not use this form. Make your requests on this page.

In order to address your request, we need to collect the information listed in the form below

Information on data processing

As a data processor, FIVES implements personal data processing when managing your contact request. The data collected are required for this processing and are retained, unless you object, for a period of 6 months from the last contact between you and FIVES. If the information is incomplete, FIVES will not be able to respond to your contact.

The data collected are exclusively for the use of FIVES departments.

Pursuant to current legislation, you have the right to request access to data concerning you, their correction, deletion and portability, as well as a right of limitation over processing of your data.

These rights can be exercised by email to or by post to the Data Protection Officer at the following address: FIVES, 3 Rue Drouot, 75009 Paris, accompanied by a copy of an identity document.

In case of a dispute involving processing of your personal data, you have the right to make a complaint to the French Data Protection Agency (CNIL).

To find out more about our personal data protection policy click here


Despatch of these emails is managed by a FIVES partner located in the United States, an active member of Privacy Shield. The partner guarantees processing compliant with European requirements for personal data protection. Unsubscribe with a single click on a link in the message received.

* required fields

Your message has been sent and will be treated as soon as possible. Thank you for contacting Fives.

Sorry, we encountered a problem, your message was not sent