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Purge gas recovery

High-quality, customised solutions for the recovery of valuable gases from ammonia synthesis purge streams. Faced with strong competitive pressures, operators of ammonia synthesis plants are often keen to increase cost efficiency. The recovery of valuable gases from the purge gas stream presents an attractive window of opportunity.

Ammonia synthesis uses syngas generated by steam reforming natural gas (as the feedstock). However, this reaction also produces a number of other gases that do not contribute to the ammonia reaction. These purge gases need to be continuously removed from the synthesis loop and are generally fed back to the reformer furnaces as fuel gas.

A typical purge gas contains about 60% hydrogen, 20% nitrogen, 5% argon, 10% methane and 4% ammonia in varying concentrations, depending on the process in place at the ammonia plant. Instead of burning purge gases, it makes good financial sense to recover valuable gases such as ammonia, hydrogen, nitrogen and argon.

Since 1958, we have been engineering, constructing, delivering and commissioning purge gas recovery plants for our customers. Building on our long-standing experience in the field, we have developed a wide portfolio of reliable, customisable solutions that allow operators to maximise the financial benefits of purge gas recovery.

Sponsor : Linde Engineering

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