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  • LNG and natural gas processing plants
  • Nitrogen rejection
Nitrogen rejection unit (NRU) Karratha, Australia for Woodside

Nitrogen rejection Linde Engineering offers nitrogen rejection units with tailored process technology to ensure highest efficiency and economics.

LNG must not contain more than 1% nitrogen to avoid storage problems. Many LNG base load plants thus feature a nitrogen rejection unit (NRU) for the safe and economical removal of nitrogen. Not only does this reduce transportation volumes, it also increases heating value.

It is also considered economical to remove nitrogen from low-BTU (British Transfer Unit) gas to either allow for liquefaction or to avoid unnecessary flaring and associated air pollution.

Gas with low heating value needs to be treated before it can be fed into the grid with the required Wobbe index. This is especially important for enhanced oil recovery, where nitrogen is used as a displacement gas and gets dissolved in the oil and associated natural gas.

Our portfolio for nitrogen rejection from natural gas includes single columns, single partitioned columns, double columns, and double columns with enrichment processes. We offer configurations tailored to the individual composition of the gas with respect to nitrogen content and other impurities, which could solidify in the cryogenic process.

Nitrogen removal is typically combined with the recovery of helium if it is also present. High-purity helium is obtained by the combination of cryogenic and pressure swing adsorption process steps.

Building on the know-how we have gained from several NRU plants built over the years, we deliver a broad portfolio of proprietary technologies for optimum recovery results. 

 

Nitrogen Rejection Unit tailored to your needs.

Linde Engineering demonstrates once again how customers can benefit from modular design at highest quality and timely delivery.
In this case a NRU comprising a process module, cold box and two pump modules will be assembled on time and on budget.
Collaborate. Innnovate. Deliver.
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Cooperating for record recoveries

Nitrogen from Linde increases the oil production in Cantarell
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Shipped ready-to-run

One-stop solution for nitrogen removal
Technology exposé: NRU
PSA Plant for the Recovery of Hydrogen, Tarragona, Spain.

Comparison of N₂ removal processes

Contact
  • Linde AG, Engineering Division
    Dr.-Carl-von-Linde-Strasse 6-14
    82049 Pullach
    Germany

    Phone +49 89 7445-3434
    Fax     +49 89 7445-4928
    Email
Download brochures
State-of-the-art nitrogen rejection technology(PDF 4.0 MB) Natural Gas Processing Plants(PDF 2.0 MB) Enhanced Oil Recovery(PDF 2.0 MB) Paving the way for LNG(PDF 911.0 KB)
Download press material
Monetizing Gas of a Giant High Helium and Nitrogen Gas Reservoir(PDF 5.0 MB)
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