Patent ID: 7442349
Filing Date: 2008-10-28
Classification: C01B,C01C,F25J,Y02P

Abstract:
1. A plant comprising: a primary reformer fluidly coupled to a secondary reformer, wherein the secondary reformer is configured to receive (a) a reformed gas from the primary reformer and (b) a stream of additional process air to thereby produce a reformer effluent that has a molar ratio of hydrogen to nitrogen of less than 2.5; an ammonia synthesis loop that is configured to form an ammonia product from an ammonia synthesis make-up gas having a molar ratio of hydrogen to nitrogen of about 3.0, wherein the synthesis loop is downstream of and operationally coupled to a refrigeration circuit that is configured to use a refrigerant other than air to cool the reformer effluent that has the molar ratio of hydrogen to nitrogen of less than 2.5; and a separation unit that is operationally coupled to the refrigeration circuit and that is upstream of and fluidly coupled to the synthesis loop, wherein the separation unit is configured to receive the cooled reformer effluent and to separate the cooled reformer effluent into a fuel gas and the ammonia synthesis make-up gas.