【Q&A Question 141】2018.05.21
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【Q&A Question 141】May 21, 2018: Briefly explain why, before raising the temperature of a new catalyst to 150°C, it is necessary to strictly control the heating rate at 10–15°C During loading, it is exposed to the atmosphere and is prone to moisture absorption; the temperature of the newly installed catalyst
During production, transportation, and loading, the new catalyst absorbs a certain amount of water vapor. If the temperature is raised too quickly, the temperature in the upper layer will become very high while the temperature in the lower layer remains low. In this case, the water vapor in the upper layer can be carried down to the lower layer by nitrogen, where it may condense into liquid water. This can result in the lower layer of catalyst being wetted, leading to caking or even rendering the catalyst unusable.
During production, transportation, and loading, the new catalyst absorbs a certain amount of water vapor. If the temperature is increased too quickly, the temperature in the upper layer will become very high while the temperature in the lower layer remains low. In this case, the water vapor in the upper layer can be carried down to the lower layer by nitrogen, where it may condense into liquid water. This can result in the lower layer of catalyst being wetted, leading to caking or even rendering the catalyst unusable
Answer: During loading, it is exposed to the atmosphere and prone to moisture absorption; the temperature of the newly installed catalyst
During the catalyst loading process, it is exposed to the atmosphere and can become damp; the temperature of the newly installed catalyst
During production, transportation, and loading, the new catalyst absorbs a certain amount of water vapor. If the temperature is raised too quickly, the temperature in the upper layer will become very high while the temperature in the lower layer remains low. In this case, the water vapor in the upper layer can be carried down to the lower layer by nitrogen, where it may condense into liquid water. This can result in the lower layer of catalyst being wetted, leading to caking or even rendering the catalyst unusable. Typically, catalyst manufacturers will provide the owner with a heating curve. Technical personnel from the manufacturer are present during startup, and as long as the heating is carried out according to the curve provided, there are usually no problems.
Prevent sudden vaporization of moisture from damaging the catalyst
During production, transportation, and loading, the new catalyst absorbs a certain amount of water vapor. If the temperature is raised too quickly, the temperature in the upper layer will become very high while the temperature in the lower layer remains low. In this case, the water vapor in the upper layer can be carried down to the lower layer by nitrogen, where it may condense into liquid water. This can result in the lower layer of catalyst being wetted, leading to caking or even rendering the catalyst unusable.
During production, transportation, and loading, the new catalyst absorbs a certain amount of water vapor. If the temperature is increased too quickly, the temperature in the upper layer will become very high while the temperature in the lower layer remains low. In this case, the water vapor in the upper layer can be carried down to the lower layer by nitrogen, where it may condense into liquid water. This can result in the lower layer of catalyst being wetted, leading to caking or even rendering the catalyst unusable
During filling, it is exposed to the atmosphere and prone to moisture absorption; the temperature of the newly installed catalyst