Low Temperature Shift Catalysts

The effluent of High temperature shift reactor should be cooled down to about 180¥C
for being cool enough to be introduced in LTS reactor. RTS.co LTS catalyst has a high
activity toward converting remaining content of carbon monoxide still presents in the
HTS outlet stream. Inlet CO concentration may vary between 1 and 5% (dry Molar
Basis) depending on the operational parameter and the performance of the HTS catalysts
which installed upstream. The CO content should be reduced down to 0.2-0.45% (Dry
Molar Basis). This catalyst is generally constituted of a ternary mixture of copper oxide
as the active metal, zinc oxide and alumina as the structure forming agents. The copper
should be reduced prior to be used for the conversion of the feed stream. The LTS
catalysts have both high and low copper content generations.
In addition, these catalysts are supplied in two types, promoted and non-promoted.
While having the same activity as non-promoted type, the promoted one can be used to
significantly suppress the formation of methanol as a by-product of the LTS reactors.