Sulfur Recovery Daily Question 2018.12.15
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Why is it necessary to passivate catalysts? Answer: The Claus and exhaust gas purification catalysts in this unit accumulate a certain amount of iron sulfide during operation. Iron sulfide has the property of self-igniting when exposed to air at low temperatures; once it does ignite, the temperature of the reactor bed rises rapidly, damaging the catalysts. This poses a serious threat to human safety. Therefore, it is necessary to passivate the catalysts when the unit is shut down.
The Claus and exhaust gas purification catalysts in this unit accumulate a certain amount of iron sulfide during operation. Iron sulfide has the property of self-igniting when exposed to air at low temperatures; once it does ignite, the temperature of the reactor bed rises rapidly, damaging the catalysts. This poses a serious threat to human safety. Therefore, it is necessary to passivate the catalysts when the unit is shut down.
The Claus and flue gas purification catalysts in the plant accumulate a certain amount of iron sulfide during operation. Iron sulfide has the property of self-igniting when exposed to air at low temperatures; once it does ignite, the temperature of the reactor bed rises rapidly, damaging the catalysts. This poses a serious threat to human safety. Therefore, it is necessary to passivate the catalysts when the plant is shut down.
Passivation is divided into pre-start passivation and shutdown passivation; pre-start passivation is used to prevent loss of control due to excessive activity of the new catalyst, while shutdown passivation is intended to prevent spontaneous oxidation
The Claus and exhaust gas purification catalysts in this unit accumulate a certain amount of iron sulfide during operation. Iron sulfide has the property of self-igniting when exposed to air at low temperatures; once it does ignite, the temperature of the reactor bed rises rapidly, damaging the catalysts. This poses a serious threat to human safety. Therefore, it is necessary to passivate the catalysts when the unit is shut down.
The Claus and exhaust gas purification catalysts in this unit accumulate a certain amount of iron sulfide during operation. Iron sulfide has the property of self-igniting when exposed to air at low temperatures; once it does ignite, the temperature of the reactor bed rises rapidly, damaging the catalysts. This poses a serious threat to human safety. Therefore, it is necessary to passivate the catalysts when the unit is shut down.
The Claus and exhaust gas purification catalysts in this unit accumulate a certain amount of iron sulfide during operation. Iron sulfide has the property of self-igniting when exposed to air at low temperatures; once it does ignite, the temperature of the reactor bed rises rapidly, damaging the catalysts. This poses a serious threat to human safety. Therefore, it is necessary to passivate the catalysts when the unit is shut down.