Temperature at which the activity of low-temperature shift catalyst decreases
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Our company specializes in low-temperature shift technology and cobalt-molybdenum catalysts; these catalysts have been in use for two years without any sulfidation occurring. At present, the catalyst’s activity has declined and the CO content in the output has increased; currently a large amount of steam is being used to maintain production, and there are no plans for further sulfidation. Does anyone have any methods to keep this catalyst in operation for another 2 months while reducing the amount of steam used?
If conditions permit, the inlet temperature of the converter can be appropriately increased.
In the owner’s case, raising the temperature for re-vulcanization doesn’t help much; the owner should just maintain that condition for two months. Increasing the inlet temperature with Kinlong will improve activity; the second stage temperature can also be increased slightly. Maintaining this setting for two months should not pose any major problems.
It is best to increase the inlet temperature of the second furnace
1# wujianfeng: Increase the hotspot temperature to raise the sulfur content at the inlet
Since the original poster doesn’t want to increase the steam volume! To increase the temperature at the inlet of the converter: as already mentioned, it is also possible to raise the concentration of carbon monoxide at the inlet of the converter; under permissible conditions, the pressure of the entire system can be increased, as well as the sulfur content in the process gas
If that’s not possible, the load can be reduced a bit
In this approach, production is generally maintained by raising the inlet temperature; efforts are made to increase the temperature at the hot spots as much as possible, in order to maximize the remaining activity of the catalyst and help overcome the difficulties
The inlet temperature has reached 220 degrees. . . Can it be added yet? The hotspot temperature rises only when the oxygen content in semi-water gas increases. . High oxygen levels aren’t good for the catalyst, right?
The inlet temperature has reached 220 degrees. . . Can it be added yet? 220 degrees isn’t high; it will just be maintained for two months. In the later stages of catalyst use, the activation temperature is high; try to raise it as much as possible.
Adding more superheated steam can not only raise the inlet temperature but also accelerate the reaction.