Medium temperature shift catalyst
Topsoe’s MTS catalysts have specifically been developed to cover a wide range of operating conditions: Topsoe MTS catalysts may be used as a replacement for the standard high temperature shift catalyst in ammonia and hydrogen plants operating at low steam to carbon ratios. In ammonia plants, the MTS catalyst will typically be followed by a low temperature shift catalyst where the CO content is further reduced.
In new hydrogen plants, the MTS catalysts may replace both the high and low temperature shift catalysts in which case the MTS exit gas is directly sent to a PSA unit.
Catalyst loading scheme and characteristics
The standard MTS loading is a tripledecker/”sandwich” loading:
- At the low temperatures in the top of the bed, the LK-813 has a higher activity than LK-819
- It has a higher sulfur capacity than LK-819 and thus gives a better protection in case sulfur should enter the system
In the hot bottom part, the more thermo-stable LK-819 is installed.