The effect of iron on methanol catalysts?
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The effect of iron on methanol catalysts? Iron has a significant impact on methanol catalysts; a small amount of iron leads to wax formation, while an excessive amount causes the catalyst to become inactive very quickly.
Before exploring the effect of iron on methanol catalysts, it is necessary to understand the sources of iron. Typically, in newly built methanol plants, there is a lot of rust in the pipelines, and thorough purging is not achieved, which can easily lead to wax formation on the catalysts.
As long as the purging is functioning properly, the impact is minimal; the required quality level for the methanol raw material is not high either, and carbon steel can be used for the storage tanks and pipelines
If the material chosen for the gas-gas heat exchanger is inappropriate, it has a significant impact on the catalyst.
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After operating for a long time, the iron in the device ends up on the catalyst, so the catalyst is prone to problems over time
Therefore, during the major maintenance, the bottom of the tank must be cleaned promptly
Regarding the selection of pipe material, if carbon steel such as 20# steel is used in the syngas circuit, carbonyl iron will be formed.