A PROCESS FOR REMOVEL AND SUBSEQUENT RECOVERY OF AMMONIA FROM A PURGE GAS STREAM

摘要

The invention relates to ammonia synthesis loops containing gasses, which do not react and would accumulate if they were not purged out. By the present invention ammonia in a purge gas is recovered by an adsorption agen pressure. The adsorption agent is chosen in suc removed again by passing a gas comprising hydrogen and nitrogen through it at the same elevated pressure as the loop pressure. This enables the adsorption agent to be regenerated by fresh synthesis gas coming from the synthesis gas compressor just before this gas enters the synthesis loop. Thereby, the regeneration requires an absolute minimum of energy consumption and equipment.