| 摘要 |
A process for synthesizing ammonia, comprising generating the synthesis gas from hydrocarbons (1) by primary reforming (5) of the hydrocarbons with steam (3) and by secondary reforming (15) of the resulting gaseous mixture (16) with air (12), subjecting a part (6) of the starting hydrocarbon mixed with the steam to a tertiary reforming (7) in which the necessary heat is provided by the reaction gaseous mixture (17) leaving the secondary reforming, causing the ammonia synthesis (37) to occur at low pressure with drying (38) of the gas conveyed to the synthesis reactor by employing molecular sieves (36, 39), causing the ammonia contained in the reacted gas to be absorbed (34) by water, and subjecting the ammonia solution so obtained to distillation by means of two distillation columns (52, 53) operating at different pressures. <IMAGE> |
