Semi-water gas shift reaction problem
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Our factory adopts high-string-low production technology! The lower reactivity of the hypervariable catalyst is not good! The highly variable export carbon monoxide exceeds the standard. How should the export indicators be controlled to meet the standards without changing the process?
Normally, in the mid-stream low process, the carbon monoxide at the outlet of the medium transformer is 4-5%. If there is a linker at the back, the load on the low transformer will be lighter. If there is methanation behind, the requirements on the low transformer will be higher. I don’t know how bad the medium-change catalyst activity you mentioned is, exporting 10% carbon monoxide? Or 15%? Generally, medium-change catalysts mainly increase the temperature and increase the steam-to-gas ratio to increase the conversion rate. If the carbon monoxide at the medium converter outlet cannot be controlled, we can only increase the conversion rate of the low converter catalyst.: Increase the hot spot temperature of the first-stage low-change catalyst bed, lower the inlet temperature of the second-stage catalyst bed, and increase the amount of low-change catalyst. The last resort is to replace the catalyst. I specialize in sulfur-tolerant shift catalysts. If necessary, you can email me the operating data of your plant and I will analyze it. mine email:dongchuancheng@tom.com
The most direct way is to increase the lower inlet temperature.
Generally speaking, increasing the temperature of the catalyst can increase its activity, and can also increase the gas-to-steam ratio of conversion. If that still doesn't work, consider the service life of your catalyst and calculate the conversion rate to see if the service life of the catalyst has expired.