Chart Energy & Chemicals is a world class designer and producer of Nitrogen Rejection Units (NRU’s) and a technological leader, having designed and built the first integrated NGL/NRU unit to handle feed gas with variable nitrogen content, and the largest single train NRU. Chart E&C can design and build cost effective custom plants in any size for shipment to any location around the globe.

Chart Energy & Chemicals offers the following world-class Nitrogen Rejection Technology:

• Stand-alone NRU's
• NRU's with helium recovery
• Integrated NGL/NRU-HeRU systems
• High-purity LNG from NRU's
• Refrigerant-grade LN2 from NRU's integrated systems

Chart E&C’s experience extends to more than forty years of hands-on design and in-house fabrication of cryogenic cold box systems. When it comes to Nitrogen Rejection Units, our experience is second to none.

Advantages:
Chart Energy & Chemicals has delivered more large-scale NRU's to the industry than any other supplier. Designs for our NRU's range from 15 MMSCFD of gas flow to the world's largest single train NRU at 450 MMSCFD.

Chart E&C designed the first integrated NGL/NRU handling variable nitrogen content in the feed gas, designed integrated LNG and/or LN2 liquefaction, and continues to be a world leader in NRU technology.

Features:
Chart Energy & Chemicals' expertise covers the full range of process conditions encountered with these integrated systems:

• Feed gas capacities ranging from 15 up to 450 MMSCFD in a single train.
• Inlet nitrogen contents extending from 10 up to 70%.
• Integrated helium recovery producing a crude helium stream for purification and liquefaction.
• Integrated LNG extraction from the NRU cold box, to be exported for vehicular fuel use.
• Integrated NGL recovery with designs for ethane recovery or rejection.
• Reduction of the residue gas streams at high pressure in order to minimize the recompression power requirements in reaching pipeline pressure.
• The process design includes aspects covered under Praxair's patent estate, which is exclusively licensed to Chart.
• The earliest of these NRU's has been in operation for almost 20 years.