The hydrogen (H2) generation unit (HGU) manufactures H2 by steam reforming propane and butane. In the final part of the HGU, the high-temperature shift conversion (HTSC) process takes place in HTSC reactors. A schematic flow has been illustrated in FIG. 1.
FIG. 1. An HTSC reactor in a H2 plant.
The shift conversion combines carbon monoxide (CO) with excess steam to produce carbon dioxide (CO2). More H2 and HTSC reduces the CO level in the reformed gas. In the reactor vessels discussed here, the gas and steam flow over an iron and chromium catalyst with a design life of 4 yr. Plant operators had observed an increase in the pressure drop trend fo
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