PROCESS FOR MAKING AMMONIA FROM HETEROGENEOUS FEEDSTOCK.

摘要

Ammonia is made from a carbon containing heterogeneous feedstock (A) by partially oxidizing the feedstock in gasifier/gas cleanup unit (1) to generate a synthesis gas containing Co; compressing the synthesis gas in compressor (2) to form a compressed synthesis gas (F) which is mixed with pressurized steam (G) to form a wet compressed synthesis gas (J); reacting the wet compressed synthesis gas (J) in shift reactor unit (3) to form H2; cryogenically removing CO2 from the shifted gas in cryogenic unit (8); feeding the gases (KK) rich in H2 leaving cryogenic unit (8) to pressure during adsorption unit (4) to obtain gas stream (L); mixing gas stream (L) with a high purity N2 stream (P) to form mixed stream (Q) in compressor (5) to form a compressed mixed stream (R) which is fed to ammonia synthesis unit (6). The tail stream (M) from the pressure swing adsorber (4) can be recycled with the synthesis gas for control purposes and for use as boiler fuel.