By how much will the activity of the low-temperature catalyst decrease after water is introduced?
Thread Content
After the tubes of the inlet water heater for the second stage of the low-voltage transformer in our plant were installed, water entered the second stage, causing the temperature to drop to 150 degrees. By the way, by how much does the activity of the low-temperature catalyst decrease after water is introduced? After the water is introduced, what factors affect the activity of the catalyst?
This is hard to quantify; it has a certain impact
Could you tell me: what factors affect catalyst activity after water is introduced?
Since some catalysts are highly sensitive to water, their activity can be significantly affected
There are several types of low-temperature catalysts: copper-containing catalysts and cobalt-molybdenum catalysts. It is necessary to specify which type of catalyst is being used in order to determine its performance after it is applied to the water stream
Low-temperature shift catalysts are particularly sensitive to water, as they are manufactured using the impregnation method; moreover, K is used in this process, and its main function is to enhance the catalyst’s activity at low temperatures. When water enters the catalyst, the active components are lost. What you are feeding water into is Section 2, and the main function of Section 2 is low-temperature conversion and quality control. I’m not sure about the amount of water that entered and the time it happened. If the situation isn’t too serious, re-sulfurizing can improve the catalyst’s activity, and the sulfurization temperature can be deliberately raised to 450 degrees. If the water ingress is severe, the catalyst can only be replaced. However, if the catalyst has been in use for a short period of time, it is possible to consider reviving and regenerating that portion of the catalyst.
Long-term exposure to water in low-variation catalysts can cause caking of the catalyst, increasing system resistance; the catalyst loses its activity after being exposed to water and should be replaced.