Process for improving the hydrogen content of a synthesis gas

摘要

A process for improving the hydrogen content of a synthesis gas stream to a synthesis loop, comprising the steps of: (a)removing a purge stream comprising hydrogen and hydrocarbons from a synthesis loop; (b)separating hydrogen from the purge stream; (c)passing the purge stream to a reformer and reacting with steam and oxygen to produce a stream comprising hydrogen and carbon monoxide; (d)subjecting the reformed reaction product stream to a shift reaction to produce a stream comprising carbon dioxide and hydrogen; (e)subjecting the product stream from the shift reaction to separation to separate hydrogen from carbon dioxide; (f)supplying the separated hydrogen to the synthesis loop; and (g)removing the carbon dioxide.