| abstract |
The present invention relates to a retrofit method for increasing the capacity of a plant front end, the plant comprising: - a recombination zone, wherein the feedstock is recombined into CH 4 , CO, CO 2 , H 2 and H 2 in at least one recombination step a recombination stream of O; a transforming region, wherein the recombination stream is transformed in a shift reaction in at least one high temperature shifting step, the method comprising the steps of: - exchanging the original Fe group with a non-Fe based catalyst in the high temperature shifting step a catalyst; - a feed stream added to the recombination zone; and - a reduced S/DG ratio (S/DG) in the original HTS step compared to the use of the original Fe-based catalyst This HTS step is carried out under DG. |