A method for producing ammonia may be provided. The method may include supplying ammonia synthesis gas to a synthesis gas screw compressor and compressing the synthesis gas. The compressed synthesis gas may be joined with a flow of recycle gas compressed in a recycle gas screw compressor. The compressed combined flow may then be introduced to an ammonia reactor. The ammonia reactor may discharge ammonia, purge gas, and unconverted gas, which may be the recycle gas.

A method of producing ammonia by the compression of the synthesis and recycle gas by screw compressors enabling efficient small ammonia plants to be designed.

The invention relates to a compression arrangement for compressing hydrogen, having at least eight compressors of a first type which, on the inlet side, are fluidically connected to a hydrogen inlet line, at least two compressors of a second type which, on the inlet side, are fluidically connected to the outlet of the compressors of the first type, at least one compressor of a third type which, on the inlet side, is fluidically connected to the outlet of the compressors of the second type, at least one compressor of a fourth type which, on the inlet side, is fluidically connected to the outlet of the compressor of the third type.