| 摘要 |
In an ammonia synthesis process at a pressure under 120 bar bas. ammonia is recovered from incompletely reacted synthesis gas by absorption in water. Unreacted synthesis gas is dried preparatory to further reaction by passing it through a charge of regenerable solid absorbent until that charge is loaded with water and switching its flow to a fresh or regenerated charge. The loaded charge is regenerated by passing ammonia-containing reacted synthesis gas through it, the displaced water being separated in the ammonia absorption step. Alternatively or additionally the water content of the unreacted synthesis gas is decreased by contacting it with liquid aqueous ammonia at below 0 DEG C. |
