Abstract: A modified purifier process, includes supplying a first stream of a feed gas containing hydrogen and nitrogen in a mol ratio of about 2:1, and also containing methane and argon, then cryogenically separating the feed gas into the following: f) a second stream of synthesis gas containing hydrogen and nitrogen in a mol ratio of about 3:1, g) waste gas containing principally nitrogen, and also containing some hydrogen and all of the methane supplied in the first stream, and splitting the waste gas into: h) a third stream of hydrogen/nitrogen gas i) a fourth stream of high concentrated nitrogen j) a fifth stream of methane rich gas, to be used as fuel. The combined second and third streams typically are passed to an ammonia synthesis process.

Abstract: A modified purifier process, includes supplying a first stream of a feed gas containing hydrogen and nitrogen in a mol ratio of about 2:1, and also containing methane and argon, then cryogenically separating the feed gas into the following: f) a second stream of synthesis gas containing hydrogen and nitrogen in a mol ratio of about 3:1, g) waste gas containing principally nitrogen, and also containing some hydrogen and all of the methane supplied in the first stream, and splitting the waste gas into: h) a third stream of hydrogen/nitrogen gas i) a fourth stream of high concentrated nitrogen j) a fifth stream of methane rich gas, to be used as fuel. The combined second and third streams typically are passed to an ammonia synthesis process.

Abstract: A process for producing ammonia synthesis gas in which a pressure swing adsorption unit is utilized to replace former CO.sub.2 removal, methanation, drying and purification steps. To increase the efficiency of the process, a hydrogen fuel cell is utilized to generate electricity and a high purity nitrogen purge stream for a pressure swing absorption unit. Accordingly, after reforming and high temperature catalytic shift conversion, the feed stream is divided into a first stream to feed the fuel cell and a second stream which is directly introduced to the pressure swing adsorption unit. After the first stream is reacted in the fuel cell, a nitrogen rich stream is passed to a de-oxygenation unit and then utilized as the pressure swing adsorption purge stream.