What factors determine the actual service life of a catalyst?
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The lifespan of a catalyst is actually a question that is not easy to answer. In the converters of some factories, catalysts supplied by Monomoc over 20 years ago can still be seen. In brief, there are two definitions for the lifespan of sulfuric acid catalysts (i.e., catalysts). Definition 1: The catalyst lifespan determined by sieve loss. For example, the typical sieve loss for Memonite vanadium catalysts using artificial sieving is 5%; assuming sieving is performed once a year, the catalyst would need to be replaced after 20 years. Thus, the catalyst lifespan determined by sieve loss can be considered to be 20 years. Definition 2: The actual service life of a catalyst in sulfuric acid production plants. The actual service life of a catalyst in such plants is determined by various factors: 1. The sieve loss of the catalyst, which is a necessary condition; 2. Whether there is sufficient head pressure from the fans; 3. The available filling height in the conversion bed; 4. The level at which emissions are controlled. If the old standard of 960 mg/Nm3 is applied, then for several years after the new catalyst is installed, it is only necessary to replace the catalyst due to sieve loss. If the standard is 400 mg/Nm3 or a stricter one such as 200 mg/Nm3, then the user must replace part of the catalyst every time maintenance is carried out. The replaced portion of the imported catalyst will still perform well if used in a unit filled with domestic catalyst.
For exhaust emission control, it’s not necessary to use catalysts; instead, increasing the amount of hydrogen peroxide used for exhaust treatment can achieve zero emissions of sulfur dioxide. We have been using this method all along
You can’t bet all of your chips on the low-tail exhaust on catalysts or tail scoops! There is a balance point at which the total cost can be minimized.
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With a long catalyst lifespan, the pressure and cost associated with handling waste catalysts are reduced.
1. Incineration screening loss； 2. Activity decay loss ； The economics of conversion and subsequent emissions determine the number of replacements.
Is hydrogen peroxide effective in removing sulfur dioxide from exhaust gases?
The pulverization of the catalyst, its activity, arsenic poisoning, and other factors can all affect the catalyst’s lifespan