System and Process for Producing Ammonia Using an Ion Transport Membrane, Gasifier, and Ammonia Synthesis Unit

摘要

System for producing ammonia wherein a gasifier is used to make synthesis gas to provide hydrogen to an ammonia reactor. An ion transport membrane assembly and optionally a cryogenic air separation are used to provide oxygen for a gasifier. The ion transport membrane assembly also provides high pressure nitrogen for use in the ammonia reactor.

主权项

1. A system for producing ammonia, the system comprising:
an ion transport membrane assembly comprising an ion transport membrane layer and having an inlet for introducing a first feed gas comprising oxygen and nitrogen into the ion transport membrane assembly, a first outlet for withdrawing a nitrogen product from the ion transport membrane assembly, and a second outlet for withdrawing a first oxygen product from the ion transport membrane assembly; a cryogenic air separation unit for producing a second oxygen product and a nitrogen-containing by-product; a gasifier operatively disposed to receive at least a portion of the first oxygen product from the ion transport membrane assembly and at least a portion of the second oxygen product from the cryogenic air separation unit, the gasifier for reacting a carbonaceous material with the at least a portion of the first oxygen product and the at least a portion of the second oxygen product to produce a synthesis gas comprising H2, CO2, CO, and H2O; a shift reactor operatively disposed to receive at least a portion of the synthesis gas from the gasifier, the shift reactor for reacting the CO in the at least a portion of the synthesis gas with H2O in the presence of a shift catalyst to produce additional H2 and CO2 in the at least a portion of the synthesis gas; a separator operatively disposed to receive at least a portion of the synthesis gas from the shift reactor, the separator for separating the at least a portion of the synthesis gas to form a hydrogen product and a by-product comprising at least CO2, H2S, and H2O; and an ammonia synthesis unit operatively disposed to receive at least a portion of the hydrogen product from the separator and operatively disposed to receive at least a portion of the nitrogen product from the ion transport membrane assembly, the ammonia synthesis unit for reacting the at least a portion of the hydrogen product with the at least a portion of the nitrogen product in said ammonia synthesis unit to produce an ammonia product.