Patent ID: 6086840
Filing Date: 2000-07-11
Classification: C01B,C01C,Y02P

Abstract:
A process for producing ammonia comprising the steps of:introducing oxygen and a carbon containing heterogeneous feedstock into a gasifier to generate a synthesis gas stream comprising at least carbon monoxide and hydrogen;reacting a portion of the carbon monoxide comprising said synthesis gas stream with water via a shift reaction to produce a shifted gas stream comprising carbon dioxide and hydrogen;passing said shifted gas stream through a cryogenic carbon dioxide recovery unit to remove a first portion of carbon dioxide from said shifted gas stream;passing the shifted gas stream from said cryogenic carbon dioxide recovery unit through a pressure swing adsorber to remove a second portion of carbon dioxide from said shifted gas stream to produce a hydrogen stream;mixing said hydrogen stream with a nitrogen stream to form a mixed stream having a desired ratio of hydrogen to nitrogen; andconverting a portion of said mixed stream into ammonia.